html控件事件處理函數調用後臺事件

html 

            function change(obj)
            {
                
                var arr = MemberData1.FunAjax(obj.value).value;
                if(    arr =="0")
                {
                    document.getElementById('lblShow').style.display ='block';
                    document.getElementById('lblShow').innerText = '此帳號已經存在';
                }        
                else
                {
                    document.getElementById('lblShow').style.display ='none';
                }    
            }

cs
private void Page_Load(object sender, System.EventArgs e)
        ...{

            if (! Page.IsPostBack)
            ...{    
                Ajax.Utility.RegisterTypeForAjax(typeof(MemberData1));//MemberData1中爲頁面的類名稱
                this.TextGAccount.Attributes.Add("onchange","javascript:change(this);");
                
                InitailData();//新增會員

                if (Request["callback"] != null && Request["callback"].ToString() == "3")
                ...{
              
                    Response.Write(BindAreaByAjax(Convert.ToInt16(Request["CityID"])));
                    Response.End();
               
                }
            }
        }


        //帳號驗證
        [Ajax.AjaxMethod()] 
        public static string FunAjax(string GAccount)
        ...{
            GuestCenter gct =new GuestCenter();
            DataTable tab = gct.GSTA_SelMemberByGAcount(GAccount);

            if(tab.Rows.Count!=0)
            ...{
                return "0";                    //帳號存在
            }
            return "1";            //帳號不存在
        }

建立HttpHandler，在web.config裏面加上

<configuration>

<system.web>

<httpHandlers>

<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />

</httpHandlers> 

<system.web>

</configuration>