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我的项目中有一个带有代码的 Global.asax 文件：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using System.Data.SqlClient;
using WrapperObjects;
using System.Security.Principal;

namespace Application
{
    public class Global : System.Web.HttpApplication
    {
        private string userLogin = string.Empty;
        void Application_Start(object sender, EventArgs e)
        {            

        }

        void Application_End(object sender, EventArgs e)
        {

        }

        void Application_Error(object sender, EventArgs e)
        {

        }

        void Session_Start(object sender, EventArgs e)
        {                               

        }

        void Session_End(object sender, EventArgs e)
        {
            DBUsers.SetUserStatusOnline("0", userLogin);   
            Session["curUserRole"] = string.Empty;
            Session["curUserLogin"] = string.Empty;
        }

        protected void Application_AuthenticateRequest(object sender, EventArgs e)
        {
            HttpApplication app = (HttpApplication)sender;
            if (app.Request.IsAuthenticated && User.Identity is FormsIdentity)
            {
                SqlConnection myConnection = new SqlConnection(DBConnection.GetConnectionString());
                SqlCommand myCommand = new SqlCommand("SELECT * FROM Users WHERE login=@login", myConnection);
                myCommand.Parameters.AddWithValue("login", app.Context.User.Identity.Name);
                myCommand.Connection.Open();
                SqlDataReader Reader = myCommand.ExecuteReader();
                string role = string.Empty;                
                while (Reader.Read())
                {
                    userLogin = Reader["login"].ToString();
                    role = Reader["role"].ToString();
                }
                if (role != string.Empty)
                {
                    FormsIdentity fi = (FormsIdentity)app.User.Identity;
                    app.Context.User = new GenericPrincipal(fi, new string[] { role });
                }
            }
        }
    }
}

当用户登录到项目运行功能时protected void Application_AuthenticateRequest(object sender, EventArgs e)，我尝试将用户登录名存储在私有字符串类型userLogin变量中。但是当此函数中的会话结束运行函数void Session_End(object sender, EventArgs e)时，我尝试通过用户登录状态“离线”将其保存在数据库中，但变量userLogin为空。我在哪里可以快速保存用户登录并在功能中使用它void Session_End(object sender, EventArgs e)？

4

1 回答 1

1

由于 Web 应用程序的无状态，您无法通过静态变量来执行此操作。如果我在哪里，我会将登录保存到 Session 状态

 protected void Application_AuthenticateRequest(object sender, EventArgs e)
    {
        HttpApplication app = (HttpApplication)sender;
        if (app.Request.IsAuthenticated && User.Identity is FormsIdentity)
        {
            SqlConnection myConnection = new SqlConnection(DBConnection.GetConnectionString());
            SqlCommand myCommand = new SqlCommand("SELECT * FROM Users WHERE login=@login", myConnection);
            myCommand.Parameters.AddWithValue("login", app.Context.User.Identity.Name);
            myCommand.Connection.Open();
            SqlDataReader Reader = myCommand.ExecuteReader();
            var userLogin = string.Empty;
            string role = string.Empty;                
            while (Reader.Read())
            {
                userLogin = Reader["login"].ToString();
                role = Reader["role"].ToString();
            }
            if (role != string.Empty)
            {
                FormsIdentity fi = (FormsIdentity)app.User.Identity;
                app.Context.User = new GenericPrincipal(fi, new string[] { role });
                Session["UserLogin"] = userLogin;
            }
        }
    }
void Session_End(object sender, EventArgs e)
    {            
        if(Session["UserLogin"]!=null)
        {
            var userLogin = (string)Session["UserLogin"];
            DBUsers.SetUserStatusOnline("0", userLogin); 
        }              
    }
于 2012-08-02T06:52:31.370 回答