有关ASP.NET中Config文件的读写讲解

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方法如下：

如果是WinForm程序，需要添加引用：

• System.ServiceModel

• System.Configuration

App.config

?xML version="1.0" encoding="utf-8" ?>
    configuration>
     appSettings>
     add key="testkey" value="0">
    /add>
     /appSettings>
    /configuration>
    

NetUtilITyLib

using System.Configuration;
namespace pcauto{
 public static class ConfigHelPEr {
       ///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;
  }
      ///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");
  }
   }
}
    

读示例

ConfigHelper.GetAppConfig("testkey")

写示例

ConfigHelper.UpdateAppConfig("testkey", "abc");
    

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