客户端访问PageMethod

•服务器端
–只能在aspx页面中定义
–只能是公开静态方法
–使用WebMethodAttribute标记
–ScriptManager的EnablePageMethods属性设为true
•客户端
–通过PageMethods.MethodName访问

aspx

     < form id = " form1 "  runat = " server " >
         < asp:ScriptManager ID = " ScriptManager1 "  runat = " server "  EnablePageMethods = " true "   />
        
         < input type = " button "  value = " Get Current Time "  onclick = " getCurrentTime() "   />
    
         < script language = " javascript "  type = " text/javascript " >
            function getCurrentTime()
            {
                PageMethods.GetCurrentTime(getCurrentTimeSucceeded);
            }
            
            function getCurrentTimeSucceeded(result)
            {
                alert(result);
            }
         </ script >
     </ form >

cs

     protected   void  Page_Load( object  sender, EventArgs e)
    {

    }

    [WebMethod]
     public   static  DateTime GetCurrentTime()
    {
         return  DateTime.UtcNow;
    }

 

如果出现PageMethods未定义的错误，请检查：
1.ScriptManager的属性 EnablePageMethods设为true
2.调用的方法要加上[System.Web.Services.WebMethod]修饰
3.调用的函数代码不能加载母板页的cs中，如果有母板页，请加到子页cs页中去