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;

}
}