discuz !NT 3.5 论坛整合 .net 网站用户登录，退出

using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls.WebParts;
using System.Data;
using System.Text;
using Discuz.Toolkit;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
using System.Xml.Linq;
using System.IO;
using Discuz.Common;
using Discuz.Forum;
using Discuz.Config;
using Discuz.Entity; 

protected void Page_Load(object sender, EventArgs e)
    {

        if (!IsPostBack)
        {
            if (Request.Cookies["dnt"] != null && Request.Cookies["dnt"].Values["userid"] != null)
            { //从cookie中获得UserID
                int uid = Convert.ToInt32(Request.Cookies["dnt"].Values["userid"].ToString());
                //得到这个用户的全部信息
                UserInfo a = Discuz.Forum.Users.GetUserInfo(uid);
                //打印出来看看对不对。
                //Response.Write(a.Username); 

                this.denglu.Visible = false;
                this.tuichu.Visible = true;
                Label1.Text =  a.Username ;
            }
            else
            {

                this.denglu.Visible = true;
                this.tuichu.Visible = false;
            }
        }

//登录
protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
    {
        string username = txtUserName.Text.Trim();
string password = txtPassWord.Text.Trim();

string apikey = "7c48cc03caede883471b42e5e9b533d8";//有Discuz后台管理扩展->通行证设置获得
string secret = "2ad48b05ac6cf0025011600d4e658db5";//同上
string url = "http://bbs.xxxx.com/";//你的bbs路径
string cookieDomain = "http://xxxx.com/";//你的域名
DiscuzSession ds = new DiscuzSession(apikey, secret, url);
int id = ds.GetUserID(username);//根据用户名获取用户ID
//用户名存在
if (id > 0)
{
//取得用户数据库中的密码
 string dbpassword=ds.GetUserInfo(id).Password;
//判断数据库中的密码和输入的密码是否一致
 if (dbpassword == FormsAuthentication.HashPasswordForStoringInConfigFile(password, "MD5").ToLower())
 {
 //输入密码正确，则登录
     ds.Login(id, password, true, 10000, cookieDomain);

     Discuz.Config.GeneralConfigInfo config = Discuz.Config.GeneralConfigs.GetConfig();

     //删除之前的错误登录信息
     LoginLogs.DeleteLoginLog(DNTRequest.GetIP());
     //根据积分公式刷新用户总积分
     UserCredits.UpdateUserCredits(id);
     //写入用户登录后的cookie
     ForumUtils.WriteUserCookie(id, Utils.StrToInt(DNTRequest.GetString("expires"), -1), config.Passwordkey, DNTRequest.GetInt("templateid", 0), DNTRequest.GetInt("loginmode", -1));
     //更新用户最后动作，如不需要可不执行
     //OnlineUsers.UpdateAction(olid, UserAction.Login.ActionID, 0, config.Onlinetimeout);
     //更新该用户最后访问时间
    // Users.UpdateUserLastvisit(id, DNTRequest.GetIP());

  this.denglu.Visible = false;
  this.tuichu.Visible = true;
  Label1.Text = ds.GetUserInfo(id).UserName;

 }
 else
 {
  //密码输入错误
   Label1.Text = "密码输入错误";

 }
}
else
{
    Label1.Text = "用户名不存在";
 }

    }

//退出
 protected void ImageButton3_Click(object sender, ImageClickEventArgs e)
    {
        //string username = txtUserName.Text.Trim();
        //string password = txtPassWord.Text.Trim();
        if (Request.Cookies["dnt"] != null && Request.Cookies["dnt"].Values["userid"] != null)
        {
            int uid = Convert.ToInt32(Request.Cookies["dnt"].Values["userid"].ToString());
            UserInfo a = Discuz.Forum.Users.GetUserInfo(uid); 

            string apikey = "7c48cc03caede883471b42e5e9b533d8";//有Discuz后台管理扩展->通行证设置获得
            string secret = "2ad48b05ac6cf0025011600d4e658db5";//同上
            string url = "http://bbs.xxxx.com/";//你的bbs路径
            string cookieDomain = "http://xxxx.com/";//你的域名
            DiscuzSession ds = new DiscuzSession(apikey, secret, url);
            ds.Logout(cookieDomain);
            int id = ds.GetUserID(a.Username);
            int olid = OnlineUsers.GetOlidByUid(id);
            OnlineUsers.DeleteRows(olid);
            ForumUtils.ClearUserCookie();
            this.denglu.Visible = true;
            this.tuichu.Visible = false;

        }
    }