ClientScript.GetCallbackEventReference几个参数的使用实例

 

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeBehind = " WebForm3.aspx.cs "  Inherits = " Cl_WebComTest.WebForm3 "   %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title ></ title >
     < script  type ="text/javascript" >
         function  fun_callbk(msg,context) {
             <%= this .ClientScript.GetCallbackEventReference( this , " msg " , " showMsg " , " context " ) %>
        }


         function  showMsg(rValue,context) {
            alert(rValue);
            alert(context.UnitText);
        }
    
     </ script >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < div >
         < div  style ="cursor:hand;background-color:#ededed;"  onclick ="var context=new Object;context.UnitText = '个';fun_callbk('大家好',context)" > click me </ div >
     </ div >
     </ form >
</ body >
</ html >

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

namespace  Cl_WebComTest
{
     public   partial   class  WebForm3 : System.Web.UI.Page, ICallbackEventHandler
    {
         string  myStr  =   string .Empty;

         public   void  RaiseCallbackEvent( string  arg)
        {

            myStr  =  arg  +   " hello " ; // 还是简单的写，将客户端传来的值赋给咱新声明的变量

             // 加一个hello,是为了验证数据的确是有服务端处理后返回的

        }


         public   string  GetCallbackResult()
        {
             return  myStr; // 将结果返回客户端
        }



         protected   void  Page_Load( object  sender, EventArgs e)
        {

        }
    }
}