当ajax出错时，自动跳转到在web.cofing中设置的错误页

aspx

     < form id = " form1 "  runat = " server " >
         < asp:ScriptManager ID = " ScriptManager1 "  runat = " server "  AllowCustomErrorsRedirect = " true " >
         </ asp:ScriptManager >

         < asp:UpdatePanel ID = " UpdatePanel1 "  runat = " server " >
             < ContentTemplate >
                 < asp:Button ID = " Button1 "  runat = " server "  Text = " Button "  OnClick = " Button1_Click "   />
             </ ContentTemplate >
         </ asp:UpdatePanel >
        

     </ form >

cs

     protected   void  Page_Load( object  sender, EventArgs e)
    {

    }

     protected   void  Button1_Click( object  sender, EventArgs e)
    {
         throw   new  Exception();
    }

在web.config中 <system.web>内加入

< customErrors mode = " On "  defaultRedirect = " ~/Error.aspx " ></ customErrors >