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ASP.NET AJAX无刷新验证用户名

 2008-08-15 11:18:40 来源:WEB开发网   
核心提示:极其简单,自行扩展HTML代码<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”_Default” %><!DOCTYPE html PUBLIC “-//W3C//DTD XHTML

极其简单,自行扩展

HTML代码

<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”Default.aspx.cs” Inherits=”_Default” %>

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.1//EN” “http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd“>
<html xmlns=”http://www.w3.org/1999/xhtml“>
<head runat=”server”>
   <title>Untitled Page</title>
   <script type=”text/javascript”>
   function GetUser()
{
   requestSimpleService = WebServiceSample.GetUser(document.getElementById(’UserName’).value, OnRequestComplete);
   return false;
}
//显示提示信息
function OnRequestComplete(result)
{
   if(result == ‘true’)
   {
     document.getElementById(’Message’).innerHTML = ‘提示:用户名已被注册.’;
     document.getElementById(’PostButton’).disabled = ‘disabled’;
   }
   else
   {
     document.getElementById(’Message’).innerHTML = ‘提示:用户名可以使用.’;
     document.getElementById(’PostButton’).disabled = ”;
   }
}
   </script>
</head>
<body>
   <form id=”form1″ runat=”server”>
     <asp:ScriptManager ID=”ScriptManager1″ runat=”server”>
     <Services>
     <asp:ServiceReference Path=”WebServiceSample.asmx” />
     </Services>
     </asp:ScriptManager>
     <input id=”UserName” type=”text” onblur=”return GetUser()” />
<input id=”PostButton” type=”button” value=”注 册” disabled=”disabled” /><br />
     <div id=”Message”></div>
   </form>
</body>
</html>

WebService代码

using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.PRotocols;
using System.Web.Script.Services;

/// <summary>
/// WebServiceSample 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]

public class WebServiceSample : System.Web.Services.WebService
{

   public WebServiceSample () {

   //如果使用设计的组件,请取消注释以下行
     //InitializeComponent();
   }

   [WebMethod]
   public string GetUser(string strUser)
   {
     string strMessage = null;
     if (strUser == “ADMIN”)
     {
       strMessage = “true”;
     }
     else
     {
       strMessage = “false”;
     }
     return strMessage;
   }
}

Tags:ASP NET AJAX

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