代码如下:

// JScript 文件function usersLogon(){ var userName = document.getElementById("txtuserName").value; var password = document.getElementById("txtpassword").value; var checkCode = document.getElementById("txtCheckCode").value; var response = userControl_logon.CheckCodeIsRight(checkCode).value; if(userName == "") { document.getElementById("txtuserName").focus(); return false; } else if(password == "") { document.getElementById("txtpassword").focus(); return false; } else if(checkCode =="") { document.getElementById("txtCheckCode").focus(); return false; } else { if(response == true) { //判断用户是否存在 userControl_logon.userNameAndPasswordIsExist(userName,password,userNameIsRight); } else { alert("验证码出错"); userControl_logon.checkCodeOperaotr(refreshCheckCode); document.getElementById("txtpassword").value = ""; } } }function userNameIsRight(res){ var userName = document.getElementById("txtuserName").value; if(res.value == true) { //用户存在,但要看此用户有没有进入管理留言版权限, userControl_logon.userNameIsRight(userName,CallBack); } else { alert("用户名或密码错误"); document.getElementById("txtpassword").value = ""; OnLoad_checkCode(); }}function CallBack(res){ if(res.value == true) { hideLogon(); var url = userControl_logon.returnUrl(); if ( url.value == 404) { showDefault(); } else { document.getElementById("Url").innerHTML = '<a href="' + url.value + '">' + url.value + '</a>' } } else { alert("对不起你的权限不够"); document.getElementById("txtpassword").value = ""; OnLoad_checkCode(); }}//隐藏登录框function hideLogon(){ var element = document.getElementById("hideLogon") element.style.display = "none" }//显示返回首页function showDefault(){ var element = document.getElementById("Returndefault") element.style.display = "block" }function OnLoad_checkCode(){ userControl_logon.checkCodeOperaotr(refreshCheckCode); document.getElementById("txtuserName").focus(); // return false;}///重新得到新的验证吗function refreshCheckCode(res){ document.getElementById("txtCheckCode").value = ""; document.getElementById("lblNumber").innerHTML = res.value;}function abce(){ alert(document.getElementById("lblNumber").value)}

下面代码

using System;using System.Data;using System.Configuration;using System.Collections;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 System.Drawing;using LHB_SQL_2005;public partial class userControl_logon : System.Web.UI.UserControl{ protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { AjaxPro.Utility.RegisterTypeForAjax(typeof(userControl_logon)); } } [AjaxPro.AjaxMethod] public static string checkCodeOperaotr() { string _checkCode = GeneralMethod.GenerateCheckCode(); System.Web.HttpContext.Current.Session["checkCode"] = _checkCode; //返回验证码 return _checkCode; } /// <summary> /// 判断验证是否正确 /// </summary> /// <param name="checkCode"></param> /// <returns></returns> [AjaxPro.AjaxMethod] public static bool CheckCodeIsRight(string checkCode) { string _checkCode = (string)(System.Web.HttpContext.Current.Session["checkCode"]); if (_checkCode == checkCode) { return true; } else { return false; } } /// <summary> /// 判断用户名及密码添加是否正确 /// </summary> /// <param name="userName">用户名</param> /// <param name="_password">用户名密码</param> /// <returns>bool</returns> [AjaxPro.AjaxMethod] public static bool userNameAndPasswordIsExist(string userName, string _password) { string password = GeneralMethod.ToEncryptPassword(_password); string executeString = "SELECT COUNT(*) FROM users WHERE userName = '" + userName.ToString() + "' AND password = '" + password + "'"; int count = int.Parse(GetCommand.ExecuteScalar(executeString)); if (count == 1) { System.Web.HttpContext.Current.Session["userName"] = userName; return true; } else { return false; } } /// <summary> /// 判断用户是不是有这进入管理留言版的权限 /// </summary> /// <param name="userName">用户名</param> /// <returns></returns> [AjaxPro.AjaxMethod] public static bool userNameIsRight(string userName) { string executeString = "SELECT [right] FROM role WHERE usersId = (select userNameId from users where userName = '" + userName + "')"; int count = int.Parse(GetCommand.ExecuteScalar(executeString)); if (count > 0) { return true; } else { return false; } } /// <summary> /// 返回Url值 /// </summary> /// <returns></returns> [AjaxPro.AjaxMethod] public static string returnUrl() { string url = ""; try { url = System.Web.HttpContext.Current.Session["url"].ToString(); } catch { url ="404"; } return url; }}

下面是页面代码

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="logon.ascx.cs" Inherits="userControl_logon" %><script language="javascript" type="text/javascript" src="../JavaScript/logon.js"></script><script language="javascript" type="text/javascript" src="JavaScript/logon.js"></script><link href="../CSS/table_css.css" rel="stylesheet" type="text/css" /><link href="CSS/table_css.css" rel="stylesheet" type="text/css" /><body onload="OnLoad_checkCode();"><div><table border="0" cellpadding="0" cellspacing="0"> <tr> <td> <table id="hideLogon" border="0" cellpadding="0" cellspacing="0" style="display:block;"> <tr> <td style="background-color: #99ccff">用户名：</td> <td><input type="text" id="txtuserName" style="width: 105px" /></td> </tr> <tr> <td style="background-color: #99ccff">密 码：</td> <td> <input id="txtpassword" type="password" style="width: 105px" /></td> </tr> <tr> <td style="background-color: #99ccff">验证码：</td> <td style="background-color: #99ccff"> <input type= "text" id="txtCheckCode" style=" width:60px" /><label id="lblNumber"></label></td> </tr> <tr> <td style="background-color: #99ccff"></td> <td style="background-color: #99ccff"> <input type="button" onclick="usersLogon();" value="登录" id="btnLogon" /></td> </tr> </table> </td> </tr> <tr> <td > <div id="Url"></div> </td> </tr> <tr> <td align="center"> <table id="Returndefault" border="0" cellpadding="0" cellspacing="0" style="display:none;"> <tr> <td> <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="~/Default.aspx">返回首页</asp:HyperLink></td> </tr> </table> </td> </tr> </table></div></body>

以上所述是小编给大家介绍的基于Ajax技术实现无刷新用户登录功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！