在Winform中动态读写app.config文件

文文文文文文文 · 发表于 2023-5-30 05:50:07

在Winform中动态读写app.config文件

https://blog.csdn.net/kingmax54212008/article/details/38987277?spm=1001.2101.3001.6650.7&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-7-38987277-blog-82746084.235%5Ev36%5Epc_relevant_default_base3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-7-38987277-blog-82746084.235%5Ev36%5Epc_relevant_default_base3&utm_relevant_index=12
1、首先需要在项目中引用：System.Configuration
2、通过OpenExeConfiguration（）这个方法来对配置文件进行操作
若当前项目的配置文件如下：

需要对上面appSettings的键值作修改，如下代码所示：

string path = Application.StartupPath + "\\ASSEMLY.exe";
Configuration config = ConfigurationManager.OpenExeConfiguration(path);
config.AppSettings.Settings.Clear();
config.AppSettings.Settings.Add("DataSource", this.DataSource);
config.AppSettings.Settings.Add("InitialCatalog", this.InitialCatalog);
config.AppSettings.Settings.Add("UserId", this.UserId);
config.AppSettings.Settings.Add("Password", this.DePassword);
config.AppSettings.Settings.Add("ConnectTimeout", this.ConnectTimeout.ToString());
// 保存对配置文件所作的更改
config.Save(ConfigurationSaveMode.Modified);
// 强制重新载入配置文件的ConnectionStrings配置节
ConfigurationManager.RefreshSection("appSettings");

其中它是不能直接修改健值的，是在修改之前要删除该键值，然后重新添加
同是，上面的只是对AppSettings进行操作，其实也可以对ConnectionStrings、SectionGroups、Sections进行操作

读取所有的AppSettings的值

StringBuilder str = new StringBuilder();
str.Append("用户名webservices地址webservices方法名称");
AppSettingsReader reader =
new AppSettingsReader();

NameValueCollection appStgs =
ConfigurationManager.AppSettings;
string[] names =
ConfigurationManager.AppSettings.AllKeys;
String value = String.Empty;
for (int i = 0; i < appStgs.Count; i++)
{

string key = names;
if (key.IndexOf("WebSiteUser") >= 0)
{
value = (String)reader.GetValue(key, value.GetType());
string[] strValue = value.Split(',');
string webservices = strValue[0];
string method = strValue[1];
str.Append("
" + key.Replace("WebSiteUser", "") + "" + webservices + "" + method + "");
}
}
str.Append("");
ViewData["ListWebSiteUser"] = str;
return View();
Winform—C#读写config配置文件
现在FrameWork2.0以上使用的是：ConfigurationManager或WebConfigurationManager。并且AppSettings属性是只读的，并不支持修改属性值．
一、如何使用ConfigurationManager？
1、添加引用：添加System.configguration

2、引用空间

3、config配置文件配置节
常用配置节：
（1）普通配置节

　　

（2）数据源配置节

　　

（3）自定义配置节

二、config文件读写
1、依据连接串名字connectionName返回数据连接字符串

//依据连接串名字connectionName返回数据连接字符串
      public static string GetConnectionStringsConfig(string connectionName)
      {
         //指定config文件读取
         string file = System.Windows.Forms.Application.ExecutablePath;
         System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(file);
         string connectionString =
            config.ConnectionStrings.ConnectionStrings[connectionName].ConnectionString.ToString();
         return connectionString;
      }
复制代码

2、更新连接字符串

///<summary>
      ///更新连接字符串
      ///</summary>
      ///<param name="newName">连接字符串名称</param>
      ///<param name="newConString">连接字符串内容</param>
      ///<param name="newProviderName">数据提供程序名称</param>
      public static void UpdateConnectionStringsConfig(string newName, string newConString, string newProviderName)
      {
         //指定config文件读取
         string file = System.Windows.Forms.Application.ExecutablePath;
         Configuration config = ConfigurationManager.OpenExeConfiguration(file);
         bool exist = false; //记录该连接串是否已经存在
         //如果要更改的连接串已经存在
         if (config.ConnectionStrings.ConnectionStrings[newName] != null)
         {
            exist = true;
         }
         // 如果连接串已存在，首先删除它
         if (exist)
         {
            config.ConnectionStrings.ConnectionStrings.Remove(newName);
         }
         //新建一个连接字符串实例
         ConnectionStringSettings mySettings =
            new ConnectionStringSettings(newName, newConString, newProviderName);
         // 将新的连接串添加到配置文件中.
         config.ConnectionStrings.ConnectionStrings.Add(mySettings);
         // 保存对配置文件所作的更改
         config.Save(ConfigurationSaveMode.Modified);
         // 强制重新载入配置文件的ConnectionStrings配置节
         ConfigurationManager.RefreshSection("connectionStrings");
      }
复制代码

3、返回*.exe.config文件中appSettings配置节的value项

///<summary>
      ///返回*.exe.config文件中appSettings配置节的value项
      ///</summary>
      ///<param name="strKey"></param>
      ///<returns></returns>
      public static string GetAppConfig(string strKey)
      {
         string file = System.Windows.Forms.Application.ExecutablePath;
         Configuration config = ConfigurationManager.OpenExeConfiguration(file);
         foreach (string key in config.AppSettings.Settings.AllKeys)
         {
            if (key == strKey)
            {
                  return config.AppSettings.Settings[strKey].Value.ToString();
            }
         }
         return null;
      }
复制代码

4、在*.exe.config文件中appSettings配置节增加一对键值对

///<summary>
      ///在*.exe.config文件中appSettings配置节增加一对键值对
      ///</summary>
      ///<param name="newKey"></param>
      ///<param name="newValue"></param>
      public static void UpdateAppConfig(string newKey, string newValue)
      {
         string file = System.Windows.Forms.Application.ExecutablePath;
         Configuration config = ConfigurationManager.OpenExeConfiguration(file);
         bool exist = false;
         foreach (string key in config.AppSettings.Settings.AllKeys)
         {
            if (key == newKey)
            {
                  exist = true;
            }
         }
         if (exist)
         {
            config.AppSettings.Settings.Remove(newKey);
         }
         config.AppSettings.Settings.Add(newKey, newValue);
         config.Save(ConfigurationSaveMode.Modified);
         ConfigurationManager.RefreshSection("appSettings");
      }
复制代码

5、修改IP地址

// 修改system.serviceModel下所有服务终结点的IP地址
      public static void UpdateServiceModelConfig(string configPath, string serverIP)
      {
         Configuration config = ConfigurationManager.OpenExeConfiguration(configPath);
         ConfigurationSectionGroup sec = config.SectionGroups["system.serviceModel"];
         ServiceModelSectionGroup serviceModelSectionGroup = sec as ServiceModelSectionGroup;
         ClientSection clientSection = serviceModelSectionGroup.Client;
         foreach (ChannelEndpointElement item in clientSection.Endpoints)
         {
            string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b";
            string address = item.Address.ToString();
            string replacement = string.Format("{0}", serverIP);
            address = Regex.Replace(address, pattern, replacement);
            item.Address = new Uri(address);
         }
         config.Save(ConfigurationSaveMode.Modified);
         ConfigurationManager.RefreshSection("system.serviceModel");
      }
      // 修改applicationSettings中App.Properties.Settings中服务的IP地址
      public static void UpdateConfig(string configPath, string serverIP)
      {
         Configuration config = ConfigurationManager.OpenExeConfiguration(configPath);
         ConfigurationSectionGroup sec = config.SectionGroups["applicationSettings"];
         ConfigurationSection configSection = sec.Sections["DataService.Properties.Settings"];
         ClientSettingsSection clientSettingsSection = configSection as ClientSettingsSection;
         if (clientSettingsSection != null)
         {
            SettingElement element1 = clientSettingsSection.Settings.Get("DataService_SystemManagerWS_SystemManagerWS");
            if (element1 != null)
            {
                  clientSettingsSection.Settings.Remove(element1);
                  string oldValue = element1.Value.ValueXml.InnerXml;
                  element1.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP);
                  clientSettingsSection.Settings.Add(element1);
            }
            SettingElement element2 = clientSettingsSection.Settings.Get("DataService_EquipManagerWS_EquipManagerWS");
            if (element2 != null)
            {
                  clientSettingsSection.Settings.Remove(element2);
                  string oldValue = element2.Value.ValueXml.InnerXml;
                  element2.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP);
                  clientSettingsSection.Settings.Add(element2);
            }
         }
         config.Save(ConfigurationSaveMode.Modified);
         ConfigurationManager.RefreshSection("applicationSettings");
      }
      private static string GetNewIP(string oldValue, string serverIP)
      {
         string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b";
         string replacement = string.Format("{0}", serverIP);
         string newvalue = Regex.Replace(oldValue, pattern, replacement);
         return newvalue;
      }
复制代码
修改IP地址

config 读写方法

using System.Configuration;
//省略其他代码
public SalesOrderData()
      {
         string str = "";
         str = ConfigurationManager.ConnectionStrings["kyd"].ToString();
         conn = new SqlConnection(str);
         cmd = conn.CreateCommand();
      }
复制代码

实际应用：
1、获取配置节的值
button1 点击获取配置节指定key的value值
button2 点击获取配置节指定name的connectionString值

结果为：

2、修改配置节的值
button1 点击获取配置节指定key的value值
button2 点击修改配置节指定key的value值为文本框的值
button3 点击获取配置节指定key新的value值

结果为：

此时配置文件key1的value值为，获取key值仍为修改前的值

如何重置为修改前的值？

如何保存修改后的值？

来源:https://www.cnblogs.com/zkwarrior/archive/2023/05/30/17442131.html
免责声明：由于采集信息均来自互联网，如果侵犯了您的权益，请联系我们【E-Mail:cb@itdo.tech】我们会及时删除侵权内容，谢谢合作！

在Winform中动态读写app.config文件

本帖子中包含更多资源