C# FormsAuthentication 实现基础认证完整示例

using System;
using System.Web;
using System.Web.Security;

namespace AuthTest
{
  public class Authentication
  {
    /// <summary>
    /// 设置用户登陆成功凭据（Cookie存储）
    /// </summary>
    /// <param name="UserName">用户名</param>
    /// <param name="PassWord">密码</param>
    /// <param name="Rights">权限</param>
    public static void SetCookie(string UserName,string PassWord,string Rights)
    {
      //构建用户数据字符串，格式为 UserName#PassWord#Rights
      String UserData = UserName + "#" + PassWord+"#"+Rights;
      
      //创建FormsAuthenticationTicket对象
      //参数依次为：版本号、用户名、创建时间、过期时间、是否持久化、UserData
      FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
          1,           // Version
          UserName,    // Name
          DateTime.Now,// IssueDate
          DateTime.Now.AddMinutes(60), // Expiration (60 minutes)
          false,       // IsPersistent
          UserData     // UserData
      );
      
      //加密Ticket
      string encryptedTicket = FormsAuthentication.Encrypt(ticket);
      
      //创建Cookie并添加至响应
      HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
      HttpContext.Current.Response.Cookies.Add(cookie);
    }

    /// <summary>
    /// 判断用户是否登陆
    /// </summary>
    /// <returns>True:已登录, False:未登录</returns>
    public static bool isLogin()
    {
      return HttpContext.Current.User.Identity.IsAuthenticated;
    }

    /// <summary>
    /// 注销登陆
    /// </summary>
    public static void logOut()
    {
      FormsAuthentication.SignOut();
    }

    /// <summary>
    /// 获取凭据中的用户名
    /// </summary>
    /// <returns>用户名</returns>
    public static string getUserName()
    {
      if (isLogin())
      {
        string strUserData = ((FormsIdentity)(HttpContext.Current.User.Identity)).Ticket.UserData;
        string[] UserData = strUserData.Split('#');
        if (UserData.Length != 0)
        {
          return UserData[0];
        }
        else
        {
          return "";
        }
      }
      else
      {
        return "";
      }
    }

    /// <summary>
    /// 获取凭据中的密码
    /// </summary>
    /// <returns>密码</returns>
    public static string getPassWord()
    {
      if (isLogin())
      {
        string strUserData = ((FormsIdentity)(HttpContext.Current.User.Identity)).Ticket.UserData;
        string[] UserData = strUserData.Split('#');
        if (UserData.Length!=0)
        {
          return UserData[1];
        }
        else
        {
          return "";
        }
      }
      else
      {
        return "";
      }
    }

    /// <summary>
    /// 获取凭据中的用户权限
    /// </summary>
    /// <returns>用户权限</returns>
    public static string getRights()
    {
      if (isLogin())
      {
        string strUserData = ((FormsIdentity)(HttpContext.Current.User.Identity)).Ticket.UserData;
        string[] UserData = strUserData.Split('#');
        if (UserData.Length!=0)
        {
          return UserData[2];
        }
        else
        {
          return "";
        }
      }
      else
      {
        return "";
      }
    }
  }
}