13.画刷（Brush）

怪味豆

在进行WPF界面设计时，我们需要在很多地方设置颜色属性，比如元素的背景色、前景色以及边框的颜色，还有形状的内部填充和笔画，这些颜色的设置在WPF中都以画刷（Brush）的形式实现。比如最常用的画刷就是SolidColorBrush，它表示一种纯色。

1. public abstract class Brush : Animatable, IFormattable, IResource
2. {
3. <Window.Resources>
4.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
5. </Window.Resources>
6. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty OpacityProperty;
7. <Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty TransformProperty;
11. <Window.Resources>
12.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
13. </Window.Resources>
14. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty RelativeTransformProperty;
16. <Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> protected Brush();
21. <Window.Resources>
22.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
23. </Window.Resources>
24. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public double Opacity { get; set; }
25. <Window.Resources>
26.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
27. </Window.Resources>
28. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Transform Transform { get; set; }
29. <Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Transform RelativeTransform { get; set; }
34. <Window.Resources>
35.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
36. </Window.Resources>
37. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Brush Clone();
38. <Window.Resources>
39.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
40. </Window.Resources>
41. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Brush CloneCurrentValue();
42. <Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public override string ToString();
46. <Window.Resources>
47.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
48. </Window.Resources>
49. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public string ToString(IFormatProvider provider);
51. }

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Brush继承于Animatable基类和Freezable基类，说明它支持更改通知。如果改变了画刷，任何使用该画刷的控件的颜色都会自动重绘。
Opacity 属性表示它支持部分透明。
Brush一共有7个子类，下表中列出了它们的信息。

画刷名称	功能说明
SolidColorBrush	使用单一的连续颜色填充区域
LinearGradientBrush	使用线性渐变绘制区域。
RadialGradientBrush	使用径向渐变绘制区域。 焦点定义渐变的开始，而圆定义渐变的终点。
ImageBrush	使用图像绘制区域。
VisualBrush	使用一个视图绘制区域。
BitmapCacheBrush	绘制带有缓存的内容的区域。
DrawingBrush	使用包括形状、文本、视频、图像或其他绘制项等填充区域。

Brush基类和子类的继承关系

 
SolidColorBrush纯色画刷
SolidColorBrush继承于Brush抽象类，表示用某一种颜色填充区域。从定义上看，它拥有一个Color属性，表示具体的颜色值。

1. public sealed class SolidColorBrush : Brush
2. {
3. <Window.Resources>
4.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
5. </Window.Resources>
6. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ColorProperty;
8. <Window.Resources>
9.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
10. </Window.Resources>
11. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public SolidColorBrush();
12. <Window.Resources>
13.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
14. </Window.Resources>
15. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public SolidColorBrush(Color color);
17. <Window.Resources>
18.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
19. </Window.Resources>
20. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Color Color { get; set; }
22. <Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static object DeserializeFrom(BinaryReader reader);
26. <Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public SolidColorBrush Clone();
30. <Window.Resources>
31.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
32. </Window.Resources>
33. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public SolidColorBrush CloneCurrentValue();
34. }

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Color 在WPF中代表颜色值，被设计成一个结构体，主要是4个属性，即A、R、G、B，分别表示Alpha透明通道值，红色通道值、绿色通道值和蓝色通道值。它们的取值范围都是0-255
案列：
设置Grid的背景颜色

1. <Grid>
2. <Window.Resources>
3.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
4. </Window.Resources>
5. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
6. <Window.Resources>
7.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
8. </Window.Resources>
9. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
10.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
11. </Window.Resources>
12. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
13. <Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
23. <Window.Resources>
24.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
25. </Window.Resources>
26. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
33.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
34. </Window.Resources>
35. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
36.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
37. </Window.Resources>
38. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
39. <Window.Resources>
40.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
41. </Window.Resources>
42. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
46.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
47. </Window.Resources>
48. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
49.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
50. </Window.Resources>
51. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
52. <Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
59. <Window.Resources>
60.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
61. </Window.Resources>
62. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
63. </Grid>

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C#代码的方式去设置背景颜色

1. SolidColorBrush solidColorBrush = new SolidColorBrush();
2. //使用系统自定义的颜色
3. solidColorBrush.Color = Colors.Green;
4. //或者从Color的FromRgb成员中得到颜色
5. solidColorBrush.Color = Color.FromRgb(0, 0x80, 0);
6. grid.Background = solidColorBrush;

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实例化成一个资源：

1. <Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>

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LinearGradientBrush渐变画刷
LinearGradientBrush是一个比较有意思的画刷，它可以从一种颜色过渡到另一种颜色，使被填充的区域呈现渐变效果

1. public sealed class LinearGradientBrush : GradientBrush{<Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty StartPointProperty;<Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty EndPointProperty;<Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public LinearGradientBrush();<Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush(GradientStopCollection gradientStopCollection);<Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush(GradientStopCollection gradientStopCollection, double angle);<Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush(Color startColor, Color endColor, double angle);<Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush(GradientStopCollection gradientStopCollection, Point startPoint, Point endPoint);<Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush(Color startColor, Color endColor, Point startPoint, Point endPoint);<Window.Resources>
26.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
27. </Window.Resources>
28. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public Point StartPoint { get; set; }<Window.Resources>
29.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
30. </Window.Resources>
31. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Point EndPoint { get; set; }<Window.Resources>
32.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
33. </Window.Resources>
34. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public LinearGradientBrush Clone();<Window.Resources>
35.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
36. </Window.Resources>
37. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public LinearGradientBrush CloneCurrentValue();}

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从定义上看，它有StartPoint 和EndPoint 两个点，表示获取和设置线性渐变的二维起始坐标和结束坐标。而它因为继承于GradientBrush基类，所以它的颜色都保存在GradientStops集合属性中。GradientStops集合中的元素类型必须为GradientStop，表示渐变中转换点的位置和颜色。所以，GradientStop拥有Color属性和Offset属性，分别表示颜色值和偏移值。
案例：
一个Grid，希望从左上角设置一个绿色，右下角设置一个蓝色，中间是两种颜色的渐变效果

1. <Grid>
2. <Window.Resources>
3.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
4. </Window.Resources>
5. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
6. <Window.Resources>
7.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
8. </Window.Resources>
9. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
10.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
11. </Window.Resources>
12. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
13. <Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
23. <Window.Resources>
24.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
25. </Window.Resources>
26. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
33.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
34. </Window.Resources>
35. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
36.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
37. </Window.Resources>
38. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
39. <Window.Resources>
40.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
41. </Window.Resources>
42. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
46.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
47. </Window.Resources>
48. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
49.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
50. </Window.Resources>
51. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
52. <Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
59. <Window.Resources>
60.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
61. </Window.Resources>
62. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
63. </Grid><Grid>
64. <Window.Resources>
65.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
66. </Window.Resources>
67. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
68. <Window.Resources>
69.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
70. </Window.Resources>
71. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
72.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
73. </Window.Resources>
74. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
75. <Window.Resources>
76.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
77. </Window.Resources>
78. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
79.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
80. </Window.Resources>
81. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
82.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
83. </Window.Resources>
84. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
85. <Window.Resources>
86.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
87. </Window.Resources>
88. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
89.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
90. </Window.Resources>
91. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
92.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
93. </Window.Resources>
94. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
95.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
96. </Window.Resources>
97. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
98.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
99. </Window.Resources>
100. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
101. <Window.Resources>
102.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
103. </Window.Resources>
104. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
105.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
106. </Window.Resources>
107. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
108.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
109. </Window.Resources>
110. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
111.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
112. </Window.Resources>
113. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
114. <Window.Resources>
115.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
116. </Window.Resources>
117. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
118.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
119. </Window.Resources>
120. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
121. <Window.Resources>
122.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
123. </Window.Resources>
124. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
125. </Grid><Window.Resources>
126.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
127. </Window.Resources>
128. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>

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LinearGradientBrush将整个Grid看成是一个0-1的矩形，所以StartPoint=（0，0）表示左上角，EndPoint=（1，1）表示右下角，这就控制了渐变的方向是从左上角到右下角的斜线。GradientStop 对象中的Offset表示在渐变方向上各颜色的占比或起点。假如我们将第一个GradientStop对象的Offset设置为0.5，那么此时的代码和效果如下所示：

1. <Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  

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RadialGradientBrush径向渐变
RadialGradientBrush径向渐变像一个圆一样，从焦点中心位置开始向四周渐变，LinearGradientBrush线性渐变具有用于定义渐变矢量的起点和终点，而径向渐变具有一个圆和一个焦点，用于定义渐变行为。 圆定义渐变的终点。 换句话说，渐变停止点为 1.0 定义圆周的颜色。 焦点定义渐变的中心。 渐变停止点为 0.0 定义焦点处的颜色。

1. public sealed class RadialGradientBrush : GradientBrush{<Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty CenterProperty;<Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty RadiusXProperty;<Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty RadiusYProperty;<Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty GradientOriginProperty;<Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public RadialGradientBrush();<Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public RadialGradientBrush(GradientStopCollection gradientStopCollection);<Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public RadialGradientBrush(Color startColor, Color endColor);<Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public Point Center { get; set; }<Window.Resources>
26.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
27. </Window.Resources>
28. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public double RadiusX { get; set; }<Window.Resources>
29.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
30. </Window.Resources>
31. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public double RadiusY { get; set; }<Window.Resources>
32.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
33. </Window.Resources>
34. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Point GradientOrigin { get; set; }<Window.Resources>
35.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
36. </Window.Resources>
37. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public RadialGradientBrush Clone();<Window.Resources>
38.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
39. </Window.Resources>
40. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public RadialGradientBrush CloneCurrentValue();}

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Center属性：获取或设置径向渐变的最外面圆的中心。
RadiusX属性：获取或设置径向渐变的最外面圆的水平半径。默认值为 0.5。
RadiusY属性：获取或设置径向渐变的最外面圆的垂直半径。默认值为 0.5。
GradientOrigin属性：获取或设置用于定义渐变开始的二维焦点的位置。默认值为 0.5。
以Ellipse控件为例，演示一下RadialGradientBrush 的用法：

1. <Grid>
2. <Window.Resources>
3.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
4. </Window.Resources>
5. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
6. <Window.Resources>
7.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
8. </Window.Resources>
9. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
10.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
11. </Window.Resources>
12. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
13. <Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
23. <Window.Resources>
24.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
25. </Window.Resources>
26. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
33.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
34. </Window.Resources>
35. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
36.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
37. </Window.Resources>
38. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
39. <Window.Resources>
40.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
41. </Window.Resources>
42. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
46.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
47. </Window.Resources>
48. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
49.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
50. </Window.Resources>
51. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
52. <Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
59. <Window.Resources>
60.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
61. </Window.Resources>
62. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
63. </Grid><Grid>
64. <Window.Resources>
65.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
66. </Window.Resources>
67. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
68. <Window.Resources>
69.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
70. </Window.Resources>
71. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
72.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
73. </Window.Resources>
74. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
75. <Window.Resources>
76.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
77. </Window.Resources>
78. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
79.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
80. </Window.Resources>
81. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
82.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
83. </Window.Resources>
84. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
85. <Window.Resources>
86.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
87. </Window.Resources>
88. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
89.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
90. </Window.Resources>
91. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
92.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
93. </Window.Resources>
94. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
95.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
96. </Window.Resources>
97. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
98.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
99. </Window.Resources>
100. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
101. <Window.Resources>
102.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
103. </Window.Resources>
104. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
105.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
106. </Window.Resources>
107. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
108.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
109. </Window.Resources>
110. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
111.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
112. </Window.Resources>
113. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
114. <Window.Resources>
115.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
116. </Window.Resources>
117. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
118.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
119. </Window.Resources>
120. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
121. <Window.Resources>
122.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
123. </Window.Resources>
124. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
125. </Grid><Grid>
126. <Window.Resources>
127.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
128. </Window.Resources>
129. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
130. <Window.Resources>
131.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
132. </Window.Resources>
133. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
134.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
135. </Window.Resources>
136. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
137. <Window.Resources>
138.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
139. </Window.Resources>
140. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
141.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
142. </Window.Resources>
143. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
144.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
145. </Window.Resources>
146. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
147. <Window.Resources>
148.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
149. </Window.Resources>
150. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
151.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
152. </Window.Resources>
153. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
154.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
155. </Window.Resources>
156. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
157.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
158. </Window.Resources>
159. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
160.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
161. </Window.Resources>
162. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
163. <Window.Resources>
164.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
165. </Window.Resources>
166. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
167.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
168. </Window.Resources>
169. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
170.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
171. </Window.Resources>
172. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
173.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
174. </Window.Resources>
175. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
176. <Window.Resources>
177.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
178. </Window.Resources>
179. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
180.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
181. </Window.Resources>
182. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
183. <Window.Resources>
184.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
185. </Window.Resources>
186. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
187. </Grid><Grid>
188. <Window.Resources>
189.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
190. </Window.Resources>
191. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
192. <Window.Resources>
193.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
194. </Window.Resources>
195. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
196.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
197. </Window.Resources>
198. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
199. <Window.Resources>
200.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
201. </Window.Resources>
202. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
203.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
204. </Window.Resources>
205. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
206.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
207. </Window.Resources>
208. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
209. <Window.Resources>
210.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
211. </Window.Resources>
212. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
213.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
214. </Window.Resources>
215. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
216.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
217. </Window.Resources>
218. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
219.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
220. </Window.Resources>
221. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
222.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
223. </Window.Resources>
224. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
225. <Window.Resources>
226.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
227. </Window.Resources>
228. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
229.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
230. </Window.Resources>
231. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
232.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
233. </Window.Resources>
234. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
235.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
236. </Window.Resources>
237. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
238. <Window.Resources>
239.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
240. </Window.Resources>
241. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
242.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
243. </Window.Resources>
244. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
245. <Window.Resources>
246.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
247. </Window.Resources>
248. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
249. </Grid><Grid>
250. <Window.Resources>
251.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
252. </Window.Resources>
253. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
254. <Window.Resources>
255.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
256. </Window.Resources>
257. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
258.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
259. </Window.Resources>
260. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
261. <Window.Resources>
262.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
263. </Window.Resources>
264. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
265.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
266. </Window.Resources>
267. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
268.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
269. </Window.Resources>
270. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
271. <Window.Resources>
272.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
273. </Window.Resources>
274. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
275.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
276. </Window.Resources>
277. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
278.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
279. </Window.Resources>
280. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
281.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
282. </Window.Resources>
283. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
284.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
285. </Window.Resources>
286. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
287. <Window.Resources>
288.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
289. </Window.Resources>
290. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
291.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
292. </Window.Resources>
293. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
294.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
295. </Window.Resources>
296. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
297.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
298. </Window.Resources>
299. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
300. <Window.Resources>
301.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
302. </Window.Resources>
303. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
304.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
305. </Window.Resources>
306. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
307. <Window.Resources>
308.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
309. </Window.Resources>
310. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
311. </Grid><Window.Resources>
312.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
313. </Window.Resources>
314. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
315.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
316. </Window.Resources>
317. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
318.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
319. </Window.Resources>
320. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>

复制代码

在上面的代码中，处于圆中心的白色渐变点由GradientOrigin属性控制，如果将值改成：GradientOrigin="0.25,0.25"，那么它会呈现下面的样子。

根据这个特性，我们可以实现一个有趣的示例。那就是当鼠标移动到椭圆内，这个径向渐变的起点坐标跟随鼠标位置变化而变化。

1. <Grid>
2. <Window.Resources>
3.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
4. </Window.Resources>
5. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
6. <Window.Resources>
7.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
8. </Window.Resources>
9. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
10.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
11. </Window.Resources>
12. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
13. <Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
23. <Window.Resources>
24.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
25. </Window.Resources>
26. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
33.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
34. </Window.Resources>
35. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
36.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
37. </Window.Resources>
38. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
39. <Window.Resources>
40.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
41. </Window.Resources>
42. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
46.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
47. </Window.Resources>
48. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
49.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
50. </Window.Resources>
51. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
52. <Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
59. <Window.Resources>
60.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
61. </Window.Resources>
62. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
63. </Grid><Grid>
64. <Window.Resources>
65.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
66. </Window.Resources>
67. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
68. <Window.Resources>
69.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
70. </Window.Resources>
71. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
72.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
73. </Window.Resources>
74. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
75. <Window.Resources>
76.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
77. </Window.Resources>
78. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
79.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
80. </Window.Resources>
81. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
82.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
83. </Window.Resources>
84. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
85. <Window.Resources>
86.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
87. </Window.Resources>
88. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
89.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
90. </Window.Resources>
91. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
92.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
93. </Window.Resources>
94. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
95.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
96. </Window.Resources>
97. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
98.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
99. </Window.Resources>
100. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
101. <Window.Resources>
102.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
103. </Window.Resources>
104. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
105.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
106. </Window.Resources>
107. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
108.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
109. </Window.Resources>
110. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
111.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
112. </Window.Resources>
113. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
114. <Window.Resources>
115.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
116. </Window.Resources>
117. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
118.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
119. </Window.Resources>
120. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
121. <Window.Resources>
122.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
123. </Window.Resources>
124. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
125. </Grid><Grid>
126. <Window.Resources>
127.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
128. </Window.Resources>
129. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
130. <Window.Resources>
131.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
132. </Window.Resources>
133. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
134.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
135. </Window.Resources>
136. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
137. <Window.Resources>
138.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
139. </Window.Resources>
140. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
141.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
142. </Window.Resources>
143. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
144.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
145. </Window.Resources>
146. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
147. <Window.Resources>
148.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
149. </Window.Resources>
150. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
151.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
152. </Window.Resources>
153. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
154.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
155. </Window.Resources>
156. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
157.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
158. </Window.Resources>
159. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
160.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
161. </Window.Resources>
162. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
163. <Window.Resources>
164.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
165. </Window.Resources>
166. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
167.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
168. </Window.Resources>
169. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
170.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
171. </Window.Resources>
172. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
173.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
174. </Window.Resources>
175. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
176. <Window.Resources>
177.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
178. </Window.Resources>
179. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
180.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
181. </Window.Resources>
182. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
183. <Window.Resources>
184.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
185. </Window.Resources>
186. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
187. </Grid><Grid>
188. <Window.Resources>
189.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
190. </Window.Resources>
191. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
192. <Window.Resources>
193.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
194. </Window.Resources>
195. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
196.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
197. </Window.Resources>
198. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
199. <Window.Resources>
200.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
201. </Window.Resources>
202. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
203.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
204. </Window.Resources>
205. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
206.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
207. </Window.Resources>
208. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
209. <Window.Resources>
210.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
211. </Window.Resources>
212. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
213.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
214. </Window.Resources>
215. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
216.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
217. </Window.Resources>
218. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
219.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
220. </Window.Resources>
221. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
222.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
223. </Window.Resources>
224. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
225. <Window.Resources>
226.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
227. </Window.Resources>
228. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
229.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
230. </Window.Resources>
231. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
232.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
233. </Window.Resources>
234. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
235.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
236. </Window.Resources>
237. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
238. <Window.Resources>
239.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
240. </Window.Resources>
241. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
242.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
243. </Window.Resources>
244. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
245. <Window.Resources>
246.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
247. </Window.Resources>
248. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
249. </Grid><Grid>
250. <Window.Resources>
251.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
252. </Window.Resources>
253. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
254. <Window.Resources>
255.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
256. </Window.Resources>
257. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
258.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
259. </Window.Resources>
260. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
261. <Window.Resources>
262.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
263. </Window.Resources>
264. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
265.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
266. </Window.Resources>
267. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
268.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
269. </Window.Resources>
270. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
271. <Window.Resources>
272.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
273. </Window.Resources>
274. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
275.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
276. </Window.Resources>
277. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
278.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
279. </Window.Resources>
280. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
281.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
282. </Window.Resources>
283. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
284.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
285. </Window.Resources>
286. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
287. <Window.Resources>
288.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
289. </Window.Resources>
290. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
291.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
292. </Window.Resources>
293. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
294.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
295. </Window.Resources>
296. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
297.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
298. </Window.Resources>
299. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
300. <Window.Resources>
301.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
302. </Window.Resources>
303. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
304.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
305. </Window.Resources>
306. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
307. <Window.Resources>
308.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
309. </Window.Resources>
310. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
311. </Grid><Grid>
312. <Window.Resources>
313.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
314. </Window.Resources>
315. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
316. <Window.Resources>
317.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
318. </Window.Resources>
319. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
320.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
321. </Window.Resources>
322. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
323. <Window.Resources>
324.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
325. </Window.Resources>
326. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
327.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
328. </Window.Resources>
329. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
330.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
331. </Window.Resources>
332. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
333. <Window.Resources>
334.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
335. </Window.Resources>
336. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
337.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
338. </Window.Resources>
339. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
340.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
341. </Window.Resources>
342. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
343.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
344. </Window.Resources>
345. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
346.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
347. </Window.Resources>
348. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
349. <Window.Resources>
350.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
351. </Window.Resources>
352. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
353.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
354. </Window.Resources>
355. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
356.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
357. </Window.Resources>
358. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
359.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
360. </Window.Resources>
361. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
362. <Window.Resources>
363.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
364. </Window.Resources>
365. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
366.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
367. </Window.Resources>
368. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
369. <Window.Resources>
370.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
371. </Window.Resources>
372. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
373. </Grid><Grid>
374. <Window.Resources>
375.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
376. </Window.Resources>
377. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
378. <Window.Resources>
379.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
380. </Window.Resources>
381. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
382.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
383. </Window.Resources>
384. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
385. <Window.Resources>
386.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
387. </Window.Resources>
388. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
389.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
390. </Window.Resources>
391. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
392.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
393. </Window.Resources>
394. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
395. <Window.Resources>
396.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
397. </Window.Resources>
398. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
399.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
400. </Window.Resources>
401. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
402.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
403. </Window.Resources>
404. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
405.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
406. </Window.Resources>
407. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
408.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
409. </Window.Resources>
410. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
411. <Window.Resources>
412.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
413. </Window.Resources>
414. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
415.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
416. </Window.Resources>
417. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
418.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
419. </Window.Resources>
420. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
421.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
422. </Window.Resources>
423. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
424. <Window.Resources>
425.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
426. </Window.Resources>
427. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
428.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
429. </Window.Resources>
430. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
431. <Window.Resources>
432.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
433. </Window.Resources>
434. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
435. </Grid><Window.Resources>
436.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
437. </Window.Resources>
438. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
439.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
440. </Window.Resources>
441. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
442.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
443. </Window.Resources>
444. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
445.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
446. </Window.Resources>
447. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
448.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
449. </Window.Resources>
450. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
451.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
452. </Window.Resources>
453. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>

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1. private void ellipse_MouseMove(object sender, MouseEventArgs e){<Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> Ellipse ellipse = e.Source as Ellipse;<Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> Point point = e.GetPosition(ellipse);<Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> double width = ellipse.Width;<Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> double height = ellipse.Height;<Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> RadialGradientBrush brush = ellipse.Fill as RadialGradientBrush;<Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> double x = point.X / width;<Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> double y = point.Y / height;<Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> brush.GradientOrigin = new Point(x, y);}

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ImageBrush图像画刷
ImageBrush表示使用图像绘制区域。它继承于TileBrush抽象基类，另外，DrawingBrush和VisualBrush也继承于TileBrush抽象基类。
TileBrush 有三种不同类型，其中每一种都使用不同类型的内容进行绘制。下面列出它3个子类的情况。

• 若使用ImageBrush子类，则画刷的填充内容是图像；
  
• 若使用DrawingBrush子类，则画刷的填充内容是绘图；
  
• 若使用VisualBrush子类，则画刷的填充内容是视觉对象（视觉树或控件）；
  

1. public abstract class TileBrush : Brush{<Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ViewportUnitsProperty;<Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ViewboxUnitsProperty;<Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ViewportProperty;<Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ViewboxProperty;<Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty StretchProperty;<Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty TileModeProperty;<Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty AlignmentXProperty;<Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty AlignmentYProperty;<Window.Resources>
26.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
27. </Window.Resources>
28. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  protected TileBrush();<Window.Resources>
29.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
30. </Window.Resources>
31. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public TileMode TileMode { get; set; }<Window.Resources>
32.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
33. </Window.Resources>
34. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Stretch Stretch { get; set; }<Window.Resources>
35.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
36. </Window.Resources>
37. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Rect Viewbox { get; set; }<Window.Resources>
38.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
39. </Window.Resources>
40. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public Rect Viewport { get; set; }<Window.Resources>
41.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
42. </Window.Resources>
43. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public AlignmentY AlignmentY { get; set; }<Window.Resources>
44.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
45. </Window.Resources>
46. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public BrushMappingMode ViewportUnits { get; set; }<Window.Resources>
47.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
48. </Window.Resources>
49. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public AlignmentX AlignmentX { get; set; }<Window.Resources>
50.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
51. </Window.Resources>
52. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public BrushMappingMode ViewboxUnits { get; set; }<Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public TileBrush Clone();<Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public TileBrush CloneCurrentValue();<Window.Resources>
59.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
60. </Window.Resources>
61. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> protected abstract void GetContentBounds(out Rect contentBounds);}

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TileMode 属性：获取或设置基本图块如何填充区域。枚举型，它一共有5个值，Tile表示在可用区域复制图像；FlipX表示复制图像但垂直翻转每个第二列；FlipY表示复制图像但水平翻转每个第二行；FlipXY表示复制图像，但是垂直翻转每个第二列，半水平翻转每个第二行。
Stretch 属性：获取或设置内容如何拉伸。
Viewbox 属性：获取或设置图块中内容的位置和尺寸。
Viewport 属性：获取或设置基本图块的位置和尺寸。它的类型是Rect，也就是用它来指定截取原图片的某个区域进行填充，这个区域的设置可以用绝对值和相对值两种方式设置，对应属性是ViewboxUnits，它有两个值，Absolute表示取绝对坐标，RelativeToBoundingBox表示取相对坐标。
AlignmentY属性：获取或设置基本图块的垂直对齐方式。
AlignmentX属性：获取或设置基本图块的垂直水平方式。
ViewboxUnits属性：获取或设置Viewbox的值是相对内容的边界框而言，还是绝对值。
ViewportUnits属性：获取或设置Viewport的值 是否是相对于输出区域的大小。
ImageBrush的定义：

1. public sealed class ImageBrush : TileBrush{<Window.Resources>
2.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
3. </Window.Resources>
4. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public static readonly DependencyProperty ImageSourceProperty;<Window.Resources>
5.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
6. </Window.Resources>
7. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public ImageBrush();<Window.Resources>
8.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
9. </Window.Resources>
10. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public ImageBrush(ImageSource image);<Window.Resources>
11.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
12. </Window.Resources>
13. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public ImageSource ImageSource { get; set; }<Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  public ImageBrush Clone();<Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> public ImageBrush CloneCurrentValue();<Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> protected override Freezable CreateInstanceCore();<Window.Resources>
23.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
24. </Window.Resources>
25. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> protected override void GetContentBounds(out Rect contentBounds);}

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ImageBrush 画刷只需要设置它的ImageSource 属性，其它的属性都是从它的基类TileBrush继承而来
案例：

1. <Grid>
2. <Window.Resources>
3.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
4. </Window.Resources>
5. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
6. <Window.Resources>
7.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
8. </Window.Resources>
9. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
10.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
11. </Window.Resources>
12. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
13. <Window.Resources>
14.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
15. </Window.Resources>
16. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
17.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
18. </Window.Resources>
19. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
20.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
21. </Window.Resources>
22. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
23. <Window.Resources>
24.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
25. </Window.Resources>
26. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
27.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
28. </Window.Resources>
29. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
30.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
31. </Window.Resources>
32. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
33.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
34. </Window.Resources>
35. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
36.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
37. </Window.Resources>
38. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
39. <Window.Resources>
40.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
41. </Window.Resources>
42. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
43.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
44. </Window.Resources>
45. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
46.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
47. </Window.Resources>
48. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
49.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
50. </Window.Resources>
51. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
52. <Window.Resources>
53.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
54. </Window.Resources>
55. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
56.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
57. </Window.Resources>
58. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
59. <Window.Resources>
60.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
61. </Window.Resources>
62. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
63. </Grid><Grid>
64. <Window.Resources>
65.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
66. </Window.Resources>
67. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
68. <Window.Resources>
69.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
70. </Window.Resources>
71. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
72.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
73. </Window.Resources>
74. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
75. <Window.Resources>
76.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
77. </Window.Resources>
78. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
79.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
80. </Window.Resources>
81. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
82.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
83. </Window.Resources>
84. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
85. <Window.Resources>
86.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
87. </Window.Resources>
88. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
89.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
90. </Window.Resources>
91. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
92.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
93. </Window.Resources>
94. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
95.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
96. </Window.Resources>
97. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
98.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
99. </Window.Resources>
100. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
101. <Window.Resources>
102.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
103. </Window.Resources>
104. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
105.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
106. </Window.Resources>
107. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
108.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
109. </Window.Resources>
110. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
111.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
112. </Window.Resources>
113. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
114. <Window.Resources>
115.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
116. </Window.Resources>
117. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
118.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
119. </Window.Resources>
120. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
121. <Window.Resources>
122.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
123. </Window.Resources>
124. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
125. </Grid><Grid>
126. <Window.Resources>
127.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
128. </Window.Resources>
129. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Grid.Background>
130. <Window.Resources>
131.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
132. </Window.Resources>
133. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
134.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
135. </Window.Resources>
136. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  <<strong>SolidColorBrush</strong>>
137. <Window.Resources>
138.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
139. </Window.Resources>
140. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
141.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
142. </Window.Resources>
143. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
144.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
145. </Window.Resources>
146. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <strong>  <SolidColorBrush.Color>
147. <Window.Resources>
148.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
149. </Window.Resources>
150. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
151.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
152. </Window.Resources>
153. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
154.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
155. </Window.Resources>
156. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
157.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
158. </Window.Resources>
159. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
160.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
161. </Window.Resources>
162. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> <Color A="255" R="255" G="0" B="0"/>
163. <Window.Resources>
164.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
165. </Window.Resources>
166. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
167.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
168. </Window.Resources>
169. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
170.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
171. </Window.Resources>
172. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
173.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
174. </Window.Resources>
175. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/></SolidColorBrush.Color>
176. <Window.Resources>
177.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
178. </Window.Resources>
179. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
180.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
181. </Window.Resources>
182. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>  </SolidColorBrush></strong>
183. <Window.Resources>
184.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
185. </Window.Resources>
186. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> </Grid.Background>
187. </Grid><Window.Resources>
188.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
189. </Window.Resources>
190. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
191.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
192. </Window.Resources>
193. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
194.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
195. </Window.Resources>
196. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
197.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
198. </Window.Resources>
199. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
200.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
201. </Window.Resources>
202. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/><Window.Resources>
203.    <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
204. </Window.Resources>
205. <Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/>

复制代码

在上面的代码中，我们给Grid控件设置了一个ImageBrush 图像画刷，并设置Stretch为UniformToFill，即自适应填充，同时设置了Viewport。那么它运行之后呈现的效果如下：

此时的Grid的背景其实就是一张图片。我们给Window对象的MouseWheel事件订阅了一个回调函数，并在其实改变了Viewport的宽度和高度。滚动鼠标的滚轮，此时Grid的背景图像的填充将会呈现如下的样子：
[code]private void Window_MouseWheel(object sender, MouseWheelEventArgs e){<Window.Resources>
   <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
</Window.Resources>
<Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> double offset = e.Delta / 3600.0;<Window.Resources>
   <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
</Window.Resources>
<Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> ImageBrush imageBrush = grid.Background as ImageBrush;<Window.Resources>
   <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
</Window.Resources>
<Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> Rect rect = imageBrush.Viewport;<Window.Resources>
   <strong> <SolidColorBrush x:Key="BackgroundBrush" Color="#123456"/></strong>
</Window.Resources>
<Grid x:Name="grid" Background="{StaticResource <strong>BackgroundBrush</strong>}"/> if (rect.Width + offset