CloudComputingFinalProject/App.code/Basic/LoginState.cs

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

namespace Basic.Tools
{
    /// <summary>
    /// 检测会员登录状态
    /// </summary>
    public class LoginState
    {
        /// <summary>
        /// 判断用户是否登录
        /// </summary>
        /// <param name="objUserName"></param>
        /// <returns></returns>
        public static void UserSession()
        {
            Basic.Model.user muser = Basic.Tools.LoginState.GetUserInfo();
            if (muser == null)
            {
                string URL = "http://" + HttpContext.Current.Request.Url.Host + HttpContext.Current.Request.RawUrl;
                System.Web.HttpContext.Current.Response.Write("<script>");
                System.Web.HttpContext.Current.Response.Write("parent.location.href='login.aspx?jump=" + System.Web.HttpContext.Current.Server.UrlEncode(URL) + "'");
                System.Web.HttpContext.Current.Response.Write("</script>");
            }
        }

        /// <summary>
        /// 判断管理员是否已经登录(解决Session超时问题)
        /// </summary>
        public static bool IsUserLogin()
        {
            //如果Session为Null
            if (System.Web.HttpContext.Current.Session[Keys.SESSION_USER_INFO] != null)
            {
                return true;
            }
            else
            {
                //检查Cookies
                string username = Basic.Tools.Utils.GetCookie("UserName", "str_key"); //解密用户名
                string userpwd = Basic.Tools.Utils.GetCookie("UserPwd", "str_key");//解密密码
                if (username != "" && userpwd != "")
                {

                    DAL.user dal = new DAL.user();
                    Model.user model = dal.GetModel(username, userpwd);
                    if (model != null)
                    {
                        System.Web.HttpContext.Current.Session[Keys.SESSION_USER_INFO] = model;
                        return true;
                    }
                }
            }
            return false;
        }
        /// <summary>
        /// 取得管理员信息
        /// </summary>
        public static Model.user GetUserInfo()
        {
            if (IsUserLogin())
            {
                Basic.DAL.user dal = new DAL.user();
                Model.user model = System.Web.HttpContext.Current.Session[Keys.SESSION_USER_INFO] as Model.user;
                model = dal.GetModel(model.id);
                if (model != null)
                {
                    return model;
                }
            }
            return null;
        }
    }
}