asp.net里登陆记住密码

Login.cs

using System; using System.Collections; using System.Configuration; using System.Data; using System.Data.SqlClient; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts;

public partial class Admin_Default : System.Web.UI.Page {protected void Page_Load(object sender, EventArgs e){Title = ConfigurationManager.AppSettings["WebName"].ToString() + " - 管理登陆";

if (!IsPostBack) { Cookie = Request.Cookies["UserInfo"]; if (Cookie != null) { Name.Text = Cookie.Values["userName"]; //asp.net中的TextBox如果TextMode为Password的时候不支持直接赋值， //在此处以添加属性的方式把读取的密码赋值给密码框 Pwd.Attributes.Add("value", BLL.CookieHelper.DecryptQueryString

(Cookie.Values["Pwd"].ToString())); } }

}

protected void Sub_Click(object sender, EventArgs e){Model.Admin User = new Model.Admin();User.AdminName = Name.Text;User.AdminPwd = BLL.Message.ToSHA512(Pwd.Text.ToString());BLL.Business Pn163 = new BLL.Business();DataTable Dt = Pn163.DtRead(User);if (!String.IsNullOrEmpty(User.AdminName) && !String.IsNullOrEmpty(User.AdminPwd)){if (Session["Code"].ToString() == ChkCode.Text){if (Dt.Rows.Count > 0){Session["Admin"] = User.AdminName;Session["Pwd"] = User.AdminPwd;Session["Comp"] = Dt.Rows[0]["Comp"].ToString();

// 如果选择"下次记住我" if (this.chboxRemeber.Checked) { this.SaveCookie(Name.Text, BLL.CookieHelper.EncryptQueryString

(Server.UrlEncode(Pwd.Text))); } Response.Redirect("./Admin.aspx"); } else BLL.Message.Show("用户名或密码错误!"); } else BLL.Message.Show("验证码错误!"); } else BLL.Message.Show("请输入用户名和密码!"); }

private HttpCookie Cookie = null;/// <summary>/// 记住用户名和密码/// </summary>private void SaveCookie(string userName, string Pwd){Cookie = Request.Cookies["UserInfo"];

if (Cookie == null || !Cookie.Values["userName"].Equals(userName)){Cookie = new HttpCookie("UserInfo");Cookie.Values.Add("userName", userName);Cookie.Values.Add("Pwd", Pwd);Cookie.Expires = DateTime.Now.AddDays(365);Response.Cookies.Add(Cookie);}} }

CookieHelper.cs

using System; using System.Collections.Generic; using System.Text; using System.Security.Cryptography; using System.IO;

namespace BLL {

// 这个类是实现了DES的加密和解密public class CookieHelper{//URL传输参数加密Key这个key可以自己设置支持8位这个东西很重要的,密钥static string _QueryStringKey = "e2345678";

/// <summary>/// 加密算法/// </summary>public static string EncryptQueryString(string QueryString){return Encrypt(QueryString, _QueryStringKey);}

/// <summary>/// 解密算法/// </summary>public static string DecryptQueryString(string QueryString){return Decrypt(QueryString, _QueryStringKey);}

public static string Encrypt(string originalString, string sKey){DESCryptoServiceProviderdes = new DESCryptoServiceProvider();

// 把字符串放到byte数组中byte[] inputByteArray = Encoding.Default.GetBytes(originalString);

des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的密钥和偏移量des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);//原文使用ASCIIEncoding.ASCII方法的

GetBytes方法MemoryStream ms = new MemoryStream();//使得输入密码必须输入英文文本CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);

cs.Write(inputByteArray, 0, inputByteArray.Length);cs.FlushFinalBlock();StringBuilder ret = new StringBuilder();

foreach (byte b in ms.ToArray()){ret.AppendFormat("{0:X2}", b);}ret.ToString();return ret.ToString();}

public static string Decrypt(string originalString, string sKey){DESCryptoServiceProviderdes = new DESCryptoServiceProvider();

byte[] inputByteArray = new byte[originalString.Length / 2];for (int x = 0; x < originalString.Length / 2; x++){int i = (Convert.ToInt32(originalString.Substring(x * 2, 2), 16));inputByteArray[x] = (byte)i;}

//建立加密对象的密钥和偏移量，此值重要，不能修改

des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);

des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);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());}

} }