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[转]Ajax简单客户登陆验证
服务器端操作方便之处我就不吹了,地球人都知道,它最烦莫过于页面刷新,头都被刷晕了,而且他在刷新的时候,还触发服务器端的事件(解决方案:http://skylaugh.cnblogs.com/archive/2006/06/05/418010.html),现在Ajax的出现,他们的结合是发展的必然!
一、介绍一下Ajax在Asp.Net中的基本使用
1、在工程中引入Ajax.dll文件。
Ajax.dll实现XmlHttpRequest请求服务器的实现细节。.net项目中,添加上对其的引用,就可以进
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
行相应封装操作了。
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2、在web.config中设置HttpHandle
<httpHandlers>
<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax"/>
</httpHandlers>
3、在 <HEAD>与</HEAD>间加入一些引用如下:
<script src=js/Xml.js></script>
<link href="css/myStyle.css" type="text/css" rel="stylesheet">
<script src="/HttpForAjax/ajax/common.ashx" type="text/javascript"></script>
<script src="/HttpForAjax/ajax/Ttyu.AjaxData,HttpForAjax.ashx" type="text/javascript"></script>
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
二、介绍正题-用户登录验证
1、前台Html:
<form id="Form1" method="post" runat="server" action="" onsubmit="login.GetLogin();return false;">
<TABLE id="Table1" cellSpacing="1" cellPadding="1" width="300" border="1">
<TR>
<TD></TD>
<TD><INPUT type="text" id="txtUsername">usename</TD>
</TR>
<TR>
<TD></TD>
<TD><INPUT type="password" id="txtPassword">pwd</TD>
</TR>
<TR>
<TD></TD>
<TD><INPUT type="submit" value="登陆"></TD>
</TR>
</TABLE>
</form>
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2、引用Js文件
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
<SCRIPT language="javascript" src="login.js" type="text/javascript"></SCRIPT>
<script language="javascript">
window.onload = function()
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
login=new Login(testAjax);
}
</script>
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login.Js文件
// 提取控件值
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
function getValueById(pObjID)
{
var obj=document.getElementById(pObjID);
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
try
{
return obj.value;
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
}catch(e)
{
alert("控件:"+pObjID+" 不存在,或没有value属性");
}
}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
function Login(obj)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
{
this.OBJ = obj;
this.GetLogin=function()
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
var returnValue;
var username=getValueById('txtUsername');
var password=getValueById('txtPassword');
if(!username||!password)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
alert('请输入用户名与密码!');
return;
}
try
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
returnValue=this.OBJ.Login(username,password).value;
}catch(e)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
alert('登录出错,请稍后再试或与管理员联系');
}
switch(returnValue)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
case 1:
alert('对不起,您输入的用户名或密码不正确或者不是管理员!');
break;
case 0:
alert('管理员登录成功!');
window.document.location.href('../Error.aspx');
break;
default:
alert('登录失败,请稍后再试或与管理员联系'+returnValue);
break;
}
}
}
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3、.cs文件
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private void Page_Load(object sender, System.EventArgs e)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
Ajax.Utility.RegisterTypeForAjax(typeof(testAjax));
}
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[Ajax.AjaxMethod()]
public int Login(string username,string password)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
{
// 管理员登陆入口
Action.Common.CDB cdb = new Action.Common.CDB();
if("admin"==cdb.ExeScalar("select upower from users where
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
uname='"+username+"' and upwd='"+password+"'"))
return 0;
else
return 1;
}
我这里写的是简单Ajax的实现,你可以密码加密,还可以加验证码之类,如此一来,就达到防止和克截获的可能
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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原文地址:https://www.cnblogs.com/kokoliu/p/524413.html
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