在MVC3里面——程序集 System.Web.Mvc.dll,
v4.0.30319有这么一个Ajax.BeginForm异步登录验证的类型，我们在下面给出一个例子：
在登录页面Logion.cshtml。使用@using
(Ajax.BeginForm("Login", "Home", new AjaxOptions { HttpMethod = "Post", OnSuccess = "tips",
OnBegin = "return ValidateLog()"
}))｛提交Form内容｝，HttpMethod="提交方式"，OnBegin="return
validateLog()"是开始提交前，对Form表单的js验证。我们直接在javascript里面写validateLog()的js验证函数就可以了。OnSuccess =
"tips"是Form表单成功提交到这个控制器后，然后再根据页面上的javascript函数tips(data)和它的返回值data，判断控制器里面回传过来的JsonResult值，是"true"还是"flase"。
[HttpPost]
public JsonResult Login(FormCollection collection){
string userName = collection["UserName"];
string passWord = collection["passWord"];
//经过数据库判断用户是否存在
//该用户有何权限
//用户和权限保存Session等等处理
JsonResult json = new JsonResult();
json.Data = new Json{result="true"}; //给JsonResult对象赋值，登录结果是否通过
return json //返回json值
}
1、用户登录页面Logion.cshtml
@{
ViewBag.Title = "登录";
Layout =
null;
}
<!DOCTYPE
html>
<html>
<head>
<link
href="/Style/index.css" rel="stylesheet" type="text/css"
/>
<title>登录</title>
<script src="/Scripts/jquery-1.5.1.min.js"
type="text/javascript"></script>
<script
src="/Scripts/PleatedEffects.js"
type="text/javascript"></script>
<script
src="/Scripts/RenzoManage.js"
type="text/javascript"></script>
<script
src="/Scripts/MicrosoftAjax.js"
type="text/javascript"></script>
<script
src="/Scripts/MicrosoftMvcAjax.js"
type="text/javascript"></script>
<script
src="/Scripts/jquery.unobtrusive-ajax.min.js"
type="text/javascript"></script>
<script
type="text/javascript">
//登录验证
function ValidateLog()
{
if
(document.getElementById(‘userName‘).value == "" ||
document.getElementById(‘userName‘).value.length == 0)
{
alert(‘用户名不能为空‘);
document.getElementById(‘userName‘).focus();
return
false;
}
if
(document.getElementById(‘passWord‘).vaule == "" ||
document.getElementById(‘passWord‘).value.length == 0)
{
alert(‘密码不能为空‘);
document.getElementById(‘passWord‘).focus();
return
false;
}
}
//登录回调函数
function tips(data)
{
try
{
if (data.result == "false")
{
alert("用户名和密码错误");
}
else
{
location.href =
‘/Home/Index‘;
}
} catch
(e)
{
alert(‘异常错误‘);
}
}
</script>
</head>
<body>
<div
id="top">
<div
class="topbg">
<div
class="main_logo_wrap">
<a href="#" class="logo" target="_blank"
title="易乐国际">易乐国际</a></div>
<div
class="nav">
<div
class="floatright">
<a href="#" class="font01 marginright45
btn_time_a">@(DateTime.Now.GetDateTimeFormats(‘D‘)[1].ToString())</a>
</div>
</div>
</div>
</div>
<div
id="content" class="c">
<div
class="rightcontents">
<div class="righttopbg
right_wrap">
<div
class="righttopword">
您所在的位置: <a
href="#">用户登录</a>
</div>
</div>
<div
class="righttable">
@using (Ajax.BeginForm("Login", "Home", new AjaxOptions { HttpMethod = "Post",
OnSuccess = "tips",
OnBegin = "return ValidateLog()"
}))
{
<table border="0" cellpadding="0" cellspacing="0" class="chaxunbiaoge
search_wh">
<tr>
<td height="55px" width="80px"
align="right">
用户名:
</td>
<td
width="175px">
<input type="text" name="userName" id="userName" class="
biaogechaxunkuang"
tabindex="1"/>
</td>
<td>
<span class="colore6080d marginleft10">*</span> <span
class="spanUserName"></span>
</td>
</tr>
<tr>
<td height="55px"
align="right">
密码:
</td>
<td>
<input type="password" name="passWord" id="passWord" class="
biaogechaxunkuang"
tabindex="2"/>
</td>
<td>
<span class="colore6080d marginleft10">*</span><span
class="spanPassWord"></span>
</td>
</tr>
<tr>
<td height="55px"
align="right">
</td>
<td>
<input name="btnlogin" type="submit" class="marginleft10 btn_dl" value="登录"
tabindex="3" style="margin-top: 14px;"
/>
</td>
<td>
</td>
</tr>
</table>
}
</div>
</div>
</div>
<div
class=" clearfloat">
</div>
<div id="bottom">
<div
class="bottomwenzi">
<span
class="floatright">后台管理系统</span></div>
</div>
</body>
</html>
2、用户登录控制器
///<summary>
///用户登陆
///</summary>
///<param
name="collection"></param>
///<returns></returns>
[HttpPost]
public JsonResult
Login(FormCollection collection)
{
string
userName =
collection["userName"];
string passWord =
collection["passWord"];
JsonResult json = new
JsonResult();
try
{
Users user = UserManage.GetUser(userName,
passWord);
if (user !=
null)
{
Session["LoginUser"] =
user;
Roles role =
AuthorityManage.GetRoleById(Convert.ToInt32(user.RoleID));
Session["AllowAuthority"] =
role.AllowAuthority;
//Session["AllowMenu"] = role.AllowMenu;
//2013116
Session["RolesInfo"] =
role;
int i = LogRecordsManage.Insert(new LogRecords() { LogMessage = role.Name +
user.Username + "于" + DateTime.Now.ToString() + "登录", OperateID = user.ID,
OperateTime = DateTime.Now, OperateType = 8
});
//json.Data = new { result = "true"
};
json.Data = new { result = "false"
};
}
else
{
json.Data = new { result = "false"
};
}
}
catch
(Exception
ex)
{
Logs.AppLogs log = new Logs.AppLogs("Casino", "Login", userName, 2,
ex.Message);
log.Insert();
CasinoWeb.Helper.LogMessage.SaveError(ex);
}
return
json;
}
Ajax.BeginForm返回方法OnSuccess,布布扣,bubuko.com
原文：http://www.cnblogs.com/BluceLee/p/3701283.html