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登录_退出

客户端代码_包含记住我

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="CZBK.TestProject.WebApp._2014_11_13.Login" %>


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=GBK"><title>
    网站管理后台登录
</title><link href="Image/style.css" rel="stylesheet" type="text/css">
    <style type="text/css">
    <!--
    body {
        margin-top: 150px;
    }
    -->
    </style>
    <script type="text/javascript">
        window.onload = function () {
            var url = document.getElementById("url");
            url.onclick = function () {
                var image = document.getElementById("Image1");
                image.src = "ValidateCode.ashx?d="+ new Date().getMilliseconds();
            }
        }
    </script>
</head>
<body>
    <form name="form1" runat="server">

    <div>
    <table width="549" height="287" border="0" align="center" cellpadding="0" cellspacing="0" background="Image/login_bg.jpg">
      <tbody><tr>
        <td width="23"><img src="Image/login_leftbg.jpg" width="23" height="287"></td>
        <td width="503" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0">
          <tbody><tr>
            <td width="49%" valign="bottom"><table width="90%" border="0" align="center" cellpadding="0" cellspacing="0">
              <tbody><tr>
                <td height="100" valign="top" class="login_text"><div align="left">
                    网站后台管理系统</div></td>
              </tr>
              <tr>
                <td><div align="right"><img src="Image/login_img.jpg" width="104" height="113"></div></td>
              </tr>
            </tbody></table></td>
            <td width="2%"><img src="Image/login_line.jpg" width="6" height="287"></td>
            <td width="49%"><div align="right">
              <table width="223" border="0" cellspacing="0" cellpadding="0">
                <tbody><tr>
                  <td><img src="Image/login_tit.jpg" width="223" height="30"></td>
                </tr>
                <tr>
                  <td><table width="100%" border="0" cellspacing="10" cellpadding="0">
                    <tbody><tr>
                      <td width="28%"><div align="left">用户名：</div></td>
                      <td width="72%"><div align="left"><span class="style1">
                          <input name="txtClientID" type="text" id="txtClientID" class="form2" style="height:15px;140px;">
                      </span></div></td>
                    </tr>
                    <tr>
                      <td><div align="left">密&nbsp;&nbsp;码：</div></td>
                      <td><div align="left"><span class="style1">
                          <input name="txtPassword" type="password" id="txtPassword" class="form2" style="height:15px;140px;"></span></div></td>
                    </tr>
                    <tr>
                      <td><div align="left">验证码：</div></td>
                      <td><div align="left">
                          <a href="javascript:void(0)" id="url"><img id="Image1" src="ValidateCode.ashx" style="border-0px;"/></a>&nbsp;</div></td>
                    </tr>
                    <tr>
                      <td><div align="left">验证码：</div></td>
                      <td><div align="left"><span class="style1">
                          <input name="txtCode" type="text" size="8" id="txtCode" class="form2" style="height:15px;"><%=ErrorMsg %></span></div></td>
                    </tr>
                  </tbody></table></td>
                </tr>
                <tr>
                  <td align="center"><table width="100%" border="0" cellspacing="0" cellpadding="0">
                    <tbody><tr>
                      <td><div align="center"><a href="http://www.800kb.com/ClientManager/#"></a></div></td>
                      <td><div align="center">
                          记住我<input type="checkbox" name="CheckMe" value="1" />
                          <input type="image" name="btnLogin" id="btnLogin" src="Image/login_menu2.jpg" style="border-0px;"><a href="http://www.800kb.com/ClientManager/#"></a></div></td>
                    </tr>
                  </tbody></table>
                      <strong><span style="color: #3180b7">辽ICP备10012593号</span></strong></td>
                </tr>
              </tbody></table>
            </div></td>
          </tr>
        </tbody></table></td>
        <td width="23"><img src="Image/login_rigbg.jpg" width="23" height="287"></td>
      </tr>
    </tbody></table>
    </div>
    </form>


</body></html>

 1 服务器端代码
 2  public partial class Login : System.Web.UI.Page
 3     {
 4         BLL.UserInfoService UserInfoService = new BLL.UserInfoService();
 5         public string ErrorMsg { get; set; }
 6         protected void Page_Load(object sender, EventArgs e)
 7         {
 8             //服务端也要校验.(与客户端校验自己完成)
 9             //1.判断验证码是否正确
10             if (IsPostBack)//表示用户单击了登录按钮
11             {
12                 if (CheckValidateCode())
13                 {
14                     UserLoginIn();
15                 }
16                 else
17                 {
18                     ErrorMsg = "验证码错误!!";
19                 }
20             }
21             else//表示GET请求
22             {
23                 CheckCookieInfo();//校验Cookie信息
24             }
25             
26         }
27         protected void CheckCookieInfo()
28         {
29             //判断Cookie中是否有值
30             if (Request.Cookies["cp1"] != null && Request.Cookies["cp2"] != null)
31             {
32                 string userName = Request.Cookies["cp1"].Value;
33                 string userPwd = Request.Cookies["cp2"].Value;
34                 //判断Cookie中存储的用户名是否正确
35                 UserInfo userInfo=UserInfoService.GetModel(userName);
36                 if (userInfo != null)
37                 {
38                     //判断密码是否正确.
39                     if (userPwd == Common.WebCommon.GetMd5String(Common.WebCommon.GetMd5String(userInfo.UserPass)))
40                     {
41                         Session["userInfo"] = userInfo;
42                         Response.Redirect("AdminIndex.aspx");
43                     }
44                 }
45                 Response.Cookies["cp1"].Expires = DateTime.Now.AddDays(-1);
46                 Response.Cookies["cp2"].Expires = DateTime.Now.AddDays(-1);
47             }
48         }
49         protected void UserLoginIn()
50         {
51             string userName = Request.Form["txtClientID"];
52             string userPwd = Request.Form["txtPassword"];
53             string msg = string.Empty;
54             UserInfo userInfo=null;
55            bool b= UserInfoService.CheckUserInfo(userName, userPwd,out msg,out userInfo);
56            if (b)
57            {
58                Session["userInfo"] = userInfo;
59                //判断用户是否选择了记住我
60                if (!string.IsNullOrEmpty(Request.Form["CheckMe"]))
61                {
62                    HttpCookie cookie1 = new HttpCookie("cp1",userName);
63                    HttpCookie cookie2 = new HttpCookie("cp2", Common.WebCommon.GetMd5String(Common.WebCommon.GetMd5String(userPwd)));
64                    cookie1.Expires = DateTime.Now.AddDays(3);
65                    cookie2.Expires = DateTime.Now.AddDays(3);
66                    Response.Cookies.Add(cookie1);
67                    Response.Cookies.Add(cookie2);
68                }
69                Response.Redirect("AdminIndex.aspx");
70            }
71            else
72            {
73                ErrorMsg = msg;
74            }
75         }
76         /// <summary>
77         /// 对验证码进行校验
78         /// </summary>
79         /// <returns></returns>
80         protected bool CheckValidateCode()
81         {
82             bool isSuccess = false;
83             if (Session["code"] != null)
84             {
85                 string sysCode = Session["code"].ToString();
86                 string txtCode = Request.Form["txtCode"];
87                 if (sysCode.Equals(txtCode, StringComparison.InvariantCultureIgnoreCase))
88                 {
89                     Session["code"] = null;
90                    // Session.Remove("code");
91                     isSuccess = true;
92                 }
93             }
94             return isSuccess;
95             
96         }
97     }

验证码处理要增加ValidateCode

退出登录

 1   public void ProcessRequest(HttpContext context)
 2         {
 3             context.Response.ContentType = "text/plain";
 4             if (context.Session["userInfo"] != null)
 5             {
 6                 context.Session["userInfo"] = null;
 7                 context.Response.Cookies["cp1"].Expires = DateTime.Now.AddDays(-1);
 8                 context.Response.Cookies["cp2"].Expires = DateTime.Now.AddDays(-1);
 9                 context.Response.Redirect("Login.aspx");
10             }
11             
12         }

 1 public class WebCommon
 2     {
 3        /// <summary>
 4        /// 对传递过来的字符串进行MD5运算
 5        /// </summary>
 6        /// <param name="str"></param>
 7        /// <returns></returns>
 8        public static string GetMd5String(string str)
 9        {
10            MD5 md5 = MD5.Create();
11            byte[]buffer=System.Text.Encoding.UTF8.GetBytes(str);
12           byte[]md5Buffer= md5.ComputeHash(buffer);
13           StringBuilder sb = new StringBuilder();
14           foreach (byte b in md5Buffer)
15           {
16               sb.Append(b.ToString("x2"));
17           }
18           return sb.ToString();
19        }
20     }

这样验证码要使用

11.13

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原文地址：https://www.cnblogs.com/liuweiqiang11188/p/6685463.html