自定义控件中怎样使用AJAX，在线急等，谢谢

Question

web自定义控件是否能有自己的AJAX---asp.net2.0

Answer 1

用AJAXPRO可以在前台JS调用后台方法

Answer 2

给你段代码，
testAjax.ascx<%@ Control Language="C#" AutoEventWireup="true" CodeFile="testAjax.ascx.cs" Inherits="testAjax" %>
    <script   type="text/javascript">   
          function   LookUpStock()   
          {   
                  var   product   =   'ppp';     
                  CallServer(product,   "");   
          }   
            
          function   ReceiveServerData(rValue)   
          {   
                  Results.innerText   =   rValue;   
          }   
      </script>   
    
  <table>   
          <tr>   
                  <td>   
              <button   onclick="LookUpStock()">Look   Up   Stock</button>   
              <br   />   
              <br   />   
              Items   in   stock:   <span   ID="Results"></span>   
              <br   />   
    
                  </td>   
          </tr>   
  </table>testAjax.ascx.csusing System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class testAjax : System.Web.UI.UserControl, ICallbackEventHandler
{
    private string str;    protected void Page_Load(object sender, EventArgs e)
    {
        String cbReference =
                this.Page.ClientScript.GetCallbackEventReference(this,
                "arg", "ReceiveServerData", "context");
        String callbackScript;
        callbackScript = "function   CallServer(arg,   context)" +
                "{   " + cbReference + "}   ;";
        this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(),
                "CallServer", callbackScript, true);
    }    protected void Button2_Click(object sender, EventArgs e)
    {    }    string ICallbackEventHandler.GetCallbackResult()
    {
        return str + "xxx";
    }    void ICallbackEventHandler.RaiseCallbackEvent(string eventArgument)
    {
        str = eventArgument;
    }
}