c#通用登录模块分享 c#通用登录模块分享
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// 举个例子：一个网站有用户系统、商家系统、网站后台3个系统
//可以分3个userType, user ,shop , system
//网站后台一般都有角色，如admin,employee
//那么网站的角色就有 user,shop,admin,employee,但是admin和employee在一个客户端是不能同时登陆的，所以他们是同一类用户（system）
使用方法：
1、添加一个类LoginUser.cs 代码如下：
代码：
namespace MVCCommonAuth
{
#region 功能说明
// 举个例子：一个网站有用户系统、商家系统、网站后台3个系统
//可以分3个userType, user ,shop , system
//网站后台一般都有角色，如admin,employee
//那么网站的角色就有 user,shop,admin,employee,但是admin和employee在一个客户端是不能同时登陆的，所以他们是同一类用户（system）
#endregion
public enum UserType
{
User,
Shop,
System
}
[Serializable]
public class LoginUser
{
private static string DESKEY = DateTime.Now.ToString("1234MMdd");
public int ID { get; set; }
public string UserName { get; set; }
public string Roles { get; set; }
public DateTime Expires { get; set; }
public readonly static string CookieNamePrefix = "authcookie";
public void Login(string userType, string domain = null, string path = null)
{
var keyName = CookieNamePrefix + userType;
var json = JsonConvert.SerializeObject(this);
var value = EncryptString(json, DESKEY);
HttpCookie cookie = new HttpCookie(keyName, value);
cookie.Expires = Expires;
if (!string.IsNullOrWhiteSpace(domain))
{
cookie.Domain = domain;
}
if (path != null)
{
cookie.Path = path;
}
HttpContext.Current.Items[keyName] = this;
HttpContext.Current.Response.Cookies.Add(cookie);
}
/// <summary>
/// 从cookie读取用户信息
/// </summary>
/// <param name="cookieName"></param>
private static LoginUser BuildUser(string keyName)
{
var cookie = HttpContext.Current.Request.Cookies[keyName];
if (cookie != null && !string.IsNullOrEmpty(cookie.Value))
{
try
{
var json = DecryptString(cookie.Value, DESKEY);
var loginuser = JsonConvert.DeserializeObject<LoginUser>(json);
if (loginuser != null)
{
if (loginuser.Expires >= DateTime.Now)
{
return loginuser;
}
}
}
catch
{
//do nothing
}
}
return null;
}
public static LoginUser GetUser(string userType)
{
var keyName = CookieNamePrefix + userType;
if (!HttpContext.Current.Items.Contains(keyName))
{
var user = BuildUser(keyName);
HttpContext.Current.Items[keyName] = user;
return user;
}
else
{
return HttpContext.Current.Items[keyName] as LoginUser;
}
}
public static int GetUserID(string userType)
{
var user = GetUser(userType);
if (user != null)
return user.ID;
return 0;
}
/// <summary>
/// 退出cookie登录
/// </summary>
public static void Logout(string userType)
{
var keyName = CookieNamePrefix + userType;
HttpCookie cookie = new HttpCookie(keyName, string.Empty);
cookie.Expires = DateTime.Now.AddMonths(-1);
HttpContext.Current.Response.Cookies.Add(cookie);
}
#region 字符串加密
/// <summary>
/// 利用DES加密算法加密字符串（可解密）
/// </summary>
/// <param name="plaintext">被加密的字符串</param>
/// <param name="key">密钥（只支持8个字节的密钥）</param>
/// <returns>加密后的字符串</returns>
private static string EncryptString(string plaintext, string key)
{
//访问数据加密标准(DES)算法的加密服务提供程序 (CSP) 版本的包装对象
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = ASCIIEncoding.ASCII.GetBytes(key); //建立加密对象的密钥和偏移量
des.IV = ASCIIEncoding.ASCII.GetBytes(key); //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
byte[] inputByteArray = Encoding.Default.GetBytes(plaintext);//把字符串放到byte数组中
MemoryStream ms = new MemoryStream();//创建其支持存储区为内存的流
//定义将数据流链接到加密转换的流
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//上面已经完成了把加密后的结果放到内存中去
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
/// <summary>
/// 利用DES解密算法解密密文（可解密）
/// </summary>
/// <param name="ciphertext">被解密的字符串</param>
/// <param name="key">密钥（只支持8个字节的密钥，同前面的加密密钥相同）</param>
/// <returns>返回被解密的字符串</returns>
private static string DecryptString(string ciphertext, string key)
{
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[ciphertext.Length / 2];
for (int x = 0; x < ciphertext.Length / 2; x++)
{
int i = (Convert.ToInt32(ciphertext.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(key); //建立加密对象的密钥和偏移量，此值重要，不能修改
des.IV = ASCIIEncoding.ASCII.GetBytes(key);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
//建立StringBuild对象，createDecrypt使用的是流对象，必须把解密后的文本变成流对象
StringBuilder ret = new StringBuilder();
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
catch (Exception)
{
return "error";
}
}
#endregion
}
}
2、登录处理过程，写入cookie：
[HttpPost]
public ActionResult Login(string username,string userpass)
{
if (username=="admin" && userpass=="admin")
{
LoginUser loginuser = new LoginUser();
loginuser.ID = 1;
loginuser.UserName = username;
loginuser.Roles = "Administrator";
loginuser.Expires = DateTime.Now.AddHours(2);
loginuser.Login("Administrator");
return Content("登录成功");
//return RedirectToAction("Index", "Home");
}
return RedirectToAction("Login");
}
3、判断用户是否登录：
//是否登录
if(LoginUser.GetUserID("Administrator") > 0)
{
}
// 用户ID
int userID=LoginUser.GetUserID("Administrator")
//获取用户名
string userName= LoginUser.GetUser("Administrator").UserName
再来分享一个示例
1.HTML部分：
<form id="form1" runat="server">
<script src="../Script/jquery-v1.10.2.js" type="text/javascript"></script>
<script src="login.js" type="text/javascript"></script>
<div class="" style="height: 160px">
<div>
<label for="userName">
帐号：</label>
<input type="text" name="userName" />
</div>
<div>
<label for="password">
密码：</label>
<input type="password" name="password" />
</div>
<input type="submit" id="btnSumit" value="登录" />
<p class="msg"> </p>
</div>
</form>
2.引入登录插件：login.js
/*!
* 插件名称：登录插件封装，使用方法：
$('#form1').login({
url: "LoginHandler.ashx",//处理登录验证逻辑的Url
userName: $("input[name='userName']"),//用户名输入框
password: $("input[name='password']"),//密码输入框
msg: $(".msg"), //提示信息
button: $("#btnSumit") //提交按钮
});
*/
(function ($) {
$.fn.login = function (option) {
var defaults = {
url: '/account/login/',
msg: $(this).find('.msg'),
userName: $(this).find("input[name='userName']"),
password: $(this).find("input[name='password']"),
button: $(this).find("#button")
};
var options = $.extend(defaults, option);
var errMsg = {
'inputUserName': '请输入用户名',
'inputPassword': '请填写登录密码',
'passwordLength': '密码应在6-32位字符内',
'noreg': '此账号未注册',
'inviladUserName': '帐号不存在',
'accountNotMatch': '账号密码不匹配',
'userLocked': '帐号锁定中，暂时无法登录',
'serverdown': '服务器繁忙，请稍后再试'
};
//提交数据
function submit() {
var userNameInput = $.trim(options.userName.val());
var passwordInput = $.trim(options.password.val());
if (userNameInput == '') {
showMsg('登录名不能为空');
options.userName.focus();
return;
}
if (passwordInput == '') {
showMsg('密码不能为空');
options.password.focus();
return;
}
$.ajax({
type: "POST",
url: options.url,
data: "userName=" + userNameInput + "&password=" + passwordInput,
success: function (msg) {
var result = eval("[" + msg + "]")[0];
if (result.status == "ok") {
//登录成功处理
showMsg("登录成功....");
} else {
showMsg(errMsg[result.status]);
}
}
});
}
//显示错误信息
function showMsg(msg) {
options.msg.html(msg);
}
//绑定按钮事件
options.button.bind('click', function () {
submit();
return false;
});
};
})(jQuery);
3.页面调用插件：
<script type="text/javascript">
$('#form1').login({
url: "AjaxLogin.aspx",
userName: $("input[name='userName']"),
password: $("input[name='password']"),
msg: $(".msg"),
button: $("#btnSumit")
});
</script>
4.后台处理逻辑（请根据实际需求做相应调整）
using System;
using System.Web;
using System.Web.UI;
namespace Whir.SiteFactory.Website.Admin.Account
{
public partial class AjaxLogin : Page
{
protected void Page_Load(object sender, EventArgs e)
{
string status = ProcessLogin();
Response.Clear();
Response.Write(status);
Response.End();
}
private string ProcessLogin()
{
try
{
string userName = HttpContext.Current.Request.Form["userName"];
string password = HttpContext.Current.Request.Form["password"];
if (string.IsNullOrEmpty(userName))
{
return "{status:'inputUserName'}"; //请输入用户名
}
if (string.IsNullOrEmpty(password))
{
return "{status:'inputPassword'}"; //请填写登录密码
}
if (password.Length < 6 || password.Length > 32)
{
return "{status:'passwordLength'}"; //密码应在6-32位字符内
}
//var user = UserService.GetUserByName(userName);
//if (user == null)
//{
// return "{status:'inviladUserName'}"; //帐号不存在
//}
//if (user.IsLocked)
//{
// return "{status:'userLocked'}"; //帐号锁定中，暂时无法登录
//}
//if (user.Password.ToLower() != password.ToMd5().ToLower())
//{
// return "{accountNotMatch:'ok'}"; //账号密码不匹配
//}
//其他操作：
//写入客户端cookie
//登录日志
return "{status:'ok'}"; //登录成功
}
catch (Exception ex)
{
return "{status:'serverdown'}"; //服务器繁忙，请稍后再试
}
}
}
}
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