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ASP.NET中Config文件的读写示例

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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");

    总结

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