wpf RelativeSource绑定
RelativeSource有四种类型Self
FindAncestor
TemplatedParent
PreviousData
a.Self
Self用于绑定源和绑定目标相同的场景中。对象的一个属性与同一对象的另一个属性绑定。
例如，让我们取一个高度和宽度相同的椭圆。在XAML文件中添加下面给出的代码。宽度属性与高度属性相对绑定。
<Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid>
b.FindAncestor
FindAncestor
顾名思义，当绑定源是绑定目标的祖先（父级）之一时使用此选项。使用FindAncestor扩展，可以找到任何级别的祖先。
现在，让我们使用FindAncestor扩展将祖先的Name属性绑定到子元素button的Content属性。
<Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid>
c.TemplatedParent
TemplatedParent是一个属性，它使您能够创建一个包含少量未知值的控件模板。这些值取决于应用ControlTemplate的控件的属性。
<Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid><Grid>
<Ellipse Width="{Binding RelativeSource={RelativeSource Self}, Path=Height}"
Height="100"
Fill="Black" />
</Grid>
d.PreviousData
PreviousData这个用得很少，表示值相对于以前数据的变化。
文章导航
[*]https://github.com/aierong/WpfDemo (自我Demo地址)
A.Sql Server2005 Transact-SQL 新兵器学习
B.MCAD学习
C.代码阅读总结
D.ASP.NET状态管理
E.DB(数据库)
F.WAP
G.WinForm
H.Flex
希望上面提到的知识对您有所提示,同时欢迎交流和指正
作者:aierong
出处:http://www.cnblogs.com/aierong
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来源:https://www.cnblogs.com/aierong/archive/2023/04/10/17303019.html
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