js请求函数
jQuery.get(
          "/library/page/ajax.apsx",
          {
              action: "funName",
              param1:"xxxx",
              param: Math.random()
          },
          function(msg) {
              //接收并处理返回的信息
          }
        );

ajax.cs文件
      using System.Reflection;
      
      protected void Page_Load(object sender, EventArgs e)
      {
          string action= GetString("action");
          MethodInfo methodInfo;
          methodInfo = this.GetType().GetMethod(action, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.IgnoreCase);
          try
          {
              methodInfo.Invoke(this, null);
          }
          catch { }
      }
     
      public void fun()
      {
          //接收参数、处理并返回处理结果
      }