Web/ACode/CheckLogin.cs

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using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
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;
using System.Web.SessionState;
using System.Text;


public static class CheckLogin
{
    
    public static string login_info(string val)//参数:session字符串值
    {
        string tem = "";
        try
        {
            HttpSessionState mysession;
            HttpCookie mycookie;
            mysession = HttpContext.Current.Session;
            mycookie = HttpContext.Current.Request.Cookies["wxcookie"];
            if (mycookie != null)
            {
                tem = HttpUtility.UrlDecode(mycookie.Values[val].ToString());
            }
            else if (mysession[val] != null && mysession[val]+"" != "")
            {
                tem = HttpUtility.UrlDecode( mysession[val].ToString());
            }
        }
        catch { }
        return tem;
    }
    public static bool meb_Login()//检测是否登录
    {
        if (string.IsNullOrEmpty(login_info("user_id")))
        {
            return false;
        }
        else
        {
            return true;
        }
    }

}