ASP.NET 2.0 C# AjaxPro RegisterTypeForAjax
I am wondering if RegisterTypeForAjax isn't working correctly. I am getting the error noted at the end of the code block below. Sample is from here: http://www.ajaxtutorials.com/asp-net-ajax-quickstart/tutorial-introduction-to-ajax-in-asp-net-2-0-and-c/
Any ideas as to why I'm getting this error? Thanks.
ASP .NET 2.0 C#
Here is the code-behind:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
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;
using AjaxPro;
namespace WebApplication1
{
public partial class Ajax_CSharp : System.Web.UI.Page
{
protected override void OnInit( EventArgs e )
{
base.OnInit( e );
Load += new EventHandler( Page_Load );
}
protected void Page_Load( object sender, EventArgs e )
{
Utility.RegisterTypeForAjax( typeof( Ajax_CSharp ) );
}
[ AjaxMethod( HttpSessionStateRequirement.ReadWrite ) ]
public string GetData()
{
// method gets a row from the db and returns a string.
}
}
Here is the ASPX page:
<%@ Page Language="C#" AutoEventWireup="false" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Ajax_CSharp" %>
<!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>Untitled Page</title>
<script type="text/javascript">
function GetData()
{
var response;
Ajax_CSharp.GetData( GetData_CallBack );
}
function GetData_CallBack( response )
{
var response = response.value;
if ( response == "Empty" )
{
alert( "No Record Found." );
}
else if ( response == "Error" )
{
alert( "An Error Occurred in Accessing the Database !!!" );
}
else
{
var arr = response.split( "~" );
var empID = arr[0].split( "," );
var empName = arr[1].split( "," );
document.getElementById( 'dlistEmployee' ).length = 0;
for ( var i = 0; i < empID.Length; i++ )
{
var o = document.createElement( "option" );
o.value = empID[i];
o.text = empName[i];
document.getElementById( 'dlistEmployee' ).add( o );
}
}
}
function dodisplay()
{
var selIndex = document.getElementById( "dlistEmployee" ).selectedIndex;
var empName = document.getElementById( "dlistEmployee" ).options( selIndex ).text;
var empID = document.getElementById( "dlistEmployee" ).options( selIndex ).value;
document.getElementById( "lblResult" ).innerHTML = "You have selected " + empName + " (ID: " + empID + " )";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div style="text-align: center;">
<input id="btnGetData"
onclick="GetData();"
type="button"
value="To Get Employee Data From DB" style="width: 203px" />
<asp:DropDownList id="dlistEmployee" OnTextChanged="dodisplay();" />
<asp:Label id="lblResult" runat="server" Text="No Record Selected" />
</div>
</form>
</body>
</html>
Run it and click on the button and I get this error:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1开发者_StackOverflow中文版.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2; MS-RTC LM 8) Timestamp: Mon, 26 Apr 2010 17:22:44 UTC
Message: 'Ajax_CSharp' is undefined Line: 13 Char: 11 Code: 0 URI: http://localhost:4678/Default.aspx
Try using the full name.
In this case change:
Ajax_CSharp.GetData( GetData_CallBack );
to
WebApplication1.Ajax_CSharp.GetData( GetData_CallBack );
What is happening is that page has no idea what Ajax_CSharp is. When using AjaxPro you always should use the FullName of a class, which is Namespace.ClassName.
For everyone still having this problem. You need to add a < form > html tag inside your page. Not necessary to include any full name tag, or any input inside de form.
<form id="Form1" method="post" runat="server">
Verify if you have already add the handlers in the web.config
<httpHandlers>
<add verb="POST,GET" path="ajaxPro/*.ashx" type="Ajax.PageHandlerFactory, AjaxPro" />
</httpHandlers>
加载中,请稍侯......
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