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jQuery+AJAX实现遮罩层登录验证界面(附源码)

时间:2024-3-2 10:41     作者:韩俊     分类: Javascript


JQuery遮罩层登录界面效果的实现,AJAX实现登录验证,文章尾有完整示例源码下载,欢迎大家学习研究。

操作系统:Windwos7 Ultimate

开发工具:Visual Studio 2010

数据库:Sql Server 2005

测试浏览器:IE8、FF3.6.8、Google Chrome (IE8中弹出登录层后会出现竖拉条,其他两种没有出现,那个竖拉条可以在JS中通过修改数值让其不出现,但是下面会出现白边,越来越觉得IE有点那个了......)
1、预览

1)登录前

2)点击登录显示登录窗口(层),同时用一个灰色透明层遮罩主窗体内容,点击【登录】,隐藏【登录】,显示loading图,登录失败,显示【登录】,隐藏登录图,同时显示提示信息

3)登录成功后,去掉去掉遮罩层和登录层,显示“xxx,您好! ”

2、实现

使用VS2010创建一个Web Site,此功能是在母版页Site.master中实现的。VS2010会自动添加JQuery的js文件到Scripts文件夹,并创建一个母版页和基于此母版页的Default.aspx和About.aspx两个窗体。

1)登录层界面设计,看Site.master中的代码

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="Site.master.cs" Inherits="SiteMaster" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head runat="server">
 <title>FlyNoteBook</title>
 <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
 <script type="text/javascript" src="Scripts/common.js"></script>
 <link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
 <script type="text/javascript" src="Scripts/login.js"></script>
 <asp:ContentPlaceHolder ID="HeadContent" runat="server">
 </asp:ContentPlaceHolder>
</head>
<body>
 <form runat="server">
 <div class="page">
 <div class="header">
 <div class="title">
   <img src="Images/Pictures/logo3.png" alt="FlyNoteBook Logo" />
  FlyNoteBook
 </div>
 <div class="loginDisplay">
 <span id="popup" runat="server">登录</span>
 <span id="loginSuccess" runat="server"></span>
 </div>
 <div class="clear hideSkiplink">
 <asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="false"
  IncludeStyleBlock="false" Orientation="Horizontal">
  <Items>
  <asp:MenuItem NavigateUrl="~/Default.aspx" Text="首页" />
  <asp:MenuItem NavigateUrl="~/About.aspx" Text="关于" />
  </Items>
 </asp:Menu>
 </div>
 </div>
 <!--登录窗口:Begin-->
 <div id="divLoginWindow">
 <table style="width: 100%;" border="0" cellpadding="2" cellspacing="0">
 <tr style="background-color: #e0f3d9; border-bottom: #bfe5b3 solid 2px">
  <td style="height: 38px; width: 100px;">
   用户登录
  </td>
  <td>
  <img src="Images/Button/close.gif" id="closeBtn" align="absmiddle" alt="关闭" title="关闭" />
  </td>
 </tr>
 <tr>
  <td colspan="2" style="height: 5px;">
  </td>
 </tr>
 <tr>
  <td align="right">
   用户名:
  </td>
  <td>
   <asp:TextBox ID="txtUserName" runat="server"></asp:TextBox>
  </td>
 </tr>
 <tr>
  <td align="right">
   密   码:
  </td>
  <td>
   <asp:TextBox ID="txtPassword" TextMode="Password" runat="server"></asp:TextBox>
  </td>
 </tr>
 <tr>
  <td align="right">
   验证码:
  </td>
  <td>
   <asp:TextBox ID="txtCode" Style="width: 88px;" runat="server"></asp:TextBox>
  <img src="Code.aspx" id="imgRndCode" style="vertical-align: middle;" onclick="ChangeCode(this);"
  alt="验证码" title="看不清,点击图片更换图片" />
  </td>
 </tr>
 <tr>
  <td colspan="2" align="center">
  <a onclick="CheckLogin()" id="alogin">登 录</a>
  <img id="loading" src="Images/Loading/loading04.gif" alt="正在登录" title="正在登录..." />
  <br />
  <span id="showMes"></span>
  </td>
 </tr>
 </table>
 </div>
 <!--登录窗口:End-->
 <div class="main">
 <asp:ContentPlaceHolder ID="MainContent" runat="server" />
 </div>
 <div class="clear">
 </div>
 </div>
 <div class="footer">
 <a href="http://www.cnblogs.com/Ferry/">By Ferry</a>
 </div>
 </form>
</body>
</html>

2)实现遮罩层和弹出登录界面的层的js文件Scripts/common.js的代码,注意,里面硬写了一些母版页Site.master中的元素的ID

$(function () {
 var screenwidth, screenheight, mytop, getPosLeft, getPosTop
 screenwidth = $(window).width();
 screenheight = $(window).height();
 //获取滚动条距顶部的偏移
 mytop = $(document).scrollTop();
 //计算弹出层的left
 getPosLeft = screenwidth / 2 - 200;
 //计算弹出层的top
 getPosTop = screenheight / 2 - 150;
 //css定位弹出层
 $("#divLoginWindow").css({ "left": getPosLeft, "top": getPosTop });
 //当浏览器窗口大小改变时
 $(window).resize(function () {
 screenwidth = $(window).width();
 screenheight = $(window).height();
 mytop = $(document).scrollTop();
 getPosLeft = screenwidth / 2 - 200;
 getPosTop = screenheight / 2 - 150;
 $("#divLoginWindow").css({ "left": getPosLeft, "top": getPosTop + mytop });
 });
 //当拉动滚动条时,弹出层跟着移动
 $(window).scroll(function () {
 screenwidth = $(window).width();
 screenheight = $(window).height();
 mytop = $(document).scrollTop();
 getPosLeft = screenwidth / 2 - 200;
 getPosTop = screenheight / 2 - 150;
 $("#divLoginWindow").css({ "left": getPosLeft, "top": getPosTop + mytop });
 });
 //点击链接弹出登录窗口
 $("#popup").click(function () {
 $("#divLoginWindow").fadeIn("slow"); //toggle("slow"); 
 $("#txtUserName").focus();
 //获取页面文档的高度
 var docheight = $(document).height();
 //追加一个层,使背景变灰
 $("body").append("<div id='greybackground'></div>");
 $("#greybackground").css({ "opacity": "0.5", "height": docheight });
 return false;
 });
 //点击关闭按钮
 $("#closeBtn").click(function () {
 $("#divLoginWindow").fadeOut("slow"); ////hide();
 //删除变灰的层
 $("#greybackground").remove();
 return false;
 });
});

//更换验证码图片
function ChangeCode(obj) {
 obj.src = "Code.aspx?" + Math.random();
} 

3)点击【登录】实现AJAX登录验证功能的js文件Scripts/login.js的代码

var count = 0;
$(document).ready(function () {
 $("#loading").hide()
});

function CheckLogin() {
 $("#alogin").hide();
 $("#loading").show();
 var txtCode = $("#txtCode");
 var txtName = $("#txtUserName");
 var txtPwd = $("#txtPassword");
 $.ajax({
 url: "CheckLogin.aspx?Code=" + txtCode.val() + "&Name=" + txtName.val() + "&Pwd=" + txtPwd.val(),
 type: "post",
 datatype: "text",
 success: function (returnValue) {
 if (returnValue != "false") {
 $("#popup").hide();
 $("#showMes").hide();
 $("#loginSuccess").html(returnValue + ',您好!');
 $("#divLoginWindow").remove();
 $("#greybackground").remove();
 $("#showMes").hide();
 }
 else {
 count = count + 1;
 $("#loading").hide();
 $("#alogin").show();
 $("#showMes").show();
 $("#showMes").html("<font color=red>登录失败,请检查后重试!(" + count + "次)</font>");
 }
 }
 })
}

4)请求的CheckLogin.aspx的后台代码,前台清除剩Page命令一行

using System;
using System.Data;

public partial class CheckLogin : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
 try
 {
 String strCode = Request.QueryString["Code"];
 String strName = Request.QueryString["Name"];
 String strPassword = Request.QueryString["Pwd"];

 if (strCode != Session["Code"].ToString())
 {
 Response.Write("false");
 }
 else
 {
 DAO.SqlHelper helper = new DAO.SqlHelper();
 DataTable dt = helper.FillDataTable(String.Format("Select UserName,TrueName From Clients Where UserName='{0}' And Password='{1}'",
  strName,
  strPassword
  ));
 if (dt != null && dt.Rows.Count > 0)
 {
  Session["TrueName"] = dt.Rows[0]["TrueName"].ToString();
  Response.Write(dt.Rows[0]["TrueName"].ToString());
 }
 else
 {
  Response.Write("false");
 }
 }
 }
 catch
 {
 Response.Write("false");
 }
 }
}

源码下载:jQuery+AJAX实现遮罩层登录验证界面

以上就是jQuery实现遮罩层登录界面,AJAX实现登录验证的全部内容,希望对大家的学习有所帮助

标签: javascript

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