ASP.NET 2.0 C# AjaxPro RegisterTypeForAjax
我想知道RegisterTypeForAjax是不是工作不正常。我得到了下面代码块末尾的错误信息。示例来自这里：http://www.ajaxtutorials.com/asp-net-ajax-quickstart/tutorial-introduction-to-ajax-in-asp-net-2-0-and-c/
你知道为什么我会得到这个错误吗？谢谢。
ASP .NET 2.0 C#
以下是代码隐藏：
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.
}
}下面是ASPX页面：
<%@ 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>运行它并单击按钮，我会得到这个错误：
网页错误详细信息
用户代理: Mozilla/4.0 (兼容；MSIE8.0；Windows NT 5.1；Trident/4.0；.NET CLR 1.1.4322；.NET CLR 2.0.50727；.NET CLR 3.0.4506.2152；.NET CLR 3.5.30729；InfoPath.2；MS-RTC 8)时间戳: Mon，26 Apr 2010 17:22:44 UTC
消息：'Ajax_CSharp‘未定义行: 13字符: 11代码:0 URI：http://localhost:4678/Default.aspx
回答 2
Stack Overflow用户
发布于 2010-04-27 01:47:13
尝试使用全名。
在这种情况下，请更改：
Ajax_CSharp.GetData( GetData_CallBack );至
WebApplication1.Ajax_CSharp.GetData( GetData_CallBack );现在发生的情况是，页面根本不知道Ajax_CSharp是什么。在使用AjaxPro时，您应该始终使用类的FullName，即Namespace.ClassName。
Stack Overflow用户
发布于 2015-08-19 02:40:27
对于每个仍然有这个问题的人。您需要在页面中添加一个< form > html标记。不需要包含任何全名标签，也不需要在de form中包含任何输入。
<form id="Form1" method="post" runat="server">验证您是否已经在web.config中添加了处理程序
<httpHandlers> <add verb="POST,GET" path="ajaxPro/*.ashx" type="Ajax.PageHandlerFactory, AjaxPro" /> </httpHandlers>
https://stackoverflow.com/questions/2715515
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