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    ASP.NET AJAX无刷新验证用户名
    时间:2016-07-24 10:08 来源: 作者: 浏览:收藏 挑错 推荐 打印
      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;
        }
        }

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