C#中FormsAuthentication用法实例

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)
    {
      //
      //string password="test";
      //
      string userdata = username + "#" + password+"#"+rights;
      if (true)
      {
        //数据放入ticket
        formsauthenticationticket ticket = new formsauthenticationticket(1, username, datetime.now, datetime.now.addminutes(60), false, userdata);
        //数据加密
        string enyticket = formsauthentication.encrypt(ticket);
        httpcookie cookie = new httpcookie(formsauthentication.formscookiename, enyticket);
        httpcontext.current.response.cookies.add(cookie);
      }
    }
    /// <summary>
    /// 判断用户是否登陆
    /// </summary>
    /// <returns>true,fales</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].tostring();
        }
        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].tostring();
        }
        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].tostring();
        }
        else
        {
          return "";
        }
      }
      else
      {
        return "";
      }
    }
  }
}