1、 web.config配置如下：

 <system.web>
  <httpHandlers>
      <add verb="POST,GET" path="ajaxpro/*.ashx" type="AjaxPro.AjaxHandlerFactory,AjaxPro.2"/>
    </httpHandlers>
 </system.web>

2、添加引用AjaxPro.2.dll

3、后台：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using AjaxPro;

    public partial class MainPage : System.Web.UI.Page
    {
        protected void Page_Load(object sender,EventArgs e)
        {
          
            AjaxPro.Utility.RegisterTypeForAjax(typeof(MainPage),this.Page);
        }
        [AjaxPro.AjaxMethod]
        public string GetServerTime()
        {
            return DateTime.Now.ToString();
        }
       }

4、前台：

<script language="javascript" type="text/javascript">
 function getAjax() {
           var oType =MainPage.GetServerTime().value;
         if(oType==1)
{
.......
}
       }
 </script>
<input id="comit" type="button" value="Ok" onclick="getAjax()" />