signlog 登陆实现,signlog 登陆实现
【 tulaoshi.com - ASP.NET 】
关于重新登陆!
1:在Global中的设置。
//添加Init,并且添加AcquireRequestState事件;
public void Init(HttpApplication application)
{
application.AcquireRequestState +=new EventHandler(application_AcquireRequestState);
}
//实现AcquireRequestState,在每次客户端response的时候都会执行这个事件;
private void application_AcquireRequestState(object sender, EventArgs e)
{
System.Web.HttpApplication App = ((HttpApplication)sender);
if(App.Context.Session == null) return;
if(App.Context.Session["userID"] == null ) return;
System.Data.DataTable dt = (System.Data.DataTable)Application["userTable"];
if(dt.Select("userID = "+Session["userID"].ToString()).Length0)
{
dt.Rows[0]["loginTime"] = System.DateTime.Now;
dt.AcceptChanges();
}
}
//Timer的间隔时间
private int interval = 20;
//在Application_Start中 1:建立在线全局用户表; 2:注册timer事件(用于间隔一定时间来维护在线用户表)。
protected void Application_Start(Object sender, EventArgs e)
{
//--1 application user table;
System.Data.DataTable dt = new DataTable();
dt.Columns.Add("userID");
dt.Columns.Add("loginTime");
dt.PrimaryKey = new System.Data.DataColumn[]{dt.Columns["userID"]};
dt.AcceptChanges();
Application.Lock();
Application["userTable"] = dt;
Application.UnLock();
//--2 Timer
System.Timers.Timer tm = new System.Timers.Timer();
tm.Interval = 60000*this.interval;
tm.Elapsed +=new System.Timers.ElapsedEventHandler(tm_Elapsed);
tm.Start();
}
//timer事件;
private void tm_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
deleteTimeOutUser();
}
//删除过期的在线用户;
private void deleteTimeOutUser()
{
if(Application["userTable"] == null) return;
System.Data.DataTable dt = (System.Data.DataTable)Application["userTable"];
foreach(System.Data.DataRow dr in dt.Rows)
{
if(System.DateTime.Compare(((System.DateTime)dr["loginTime"]).AddMinutes(2),System.DateTime.Now)<0)
dr.Delete();
}
dt.AcceptChanges();
}
//------------------------------用户单击退出后--的过程-----------------------------------------
//退出
public void reLogin(System.Web.UI.Page currentPage)
{
if((currentPage.Session != null)&&(currentPage.Session["userID"] != null))
{
this.deleteUser(int.Parse(currentPage.Session["userID"].ToString()),currentPage.Application);
}
currentPage.Session.Abandon();
}
//删除当前用户在application中的userID;
private void deleteUser(int userID,System.Web.HttpApplicationState Application)
{
if(Application["userTable"] == null) return;
System.Data.DataTable dt = (System.Data.DataTable)Application["userTable"];
foreach(System.Data.DataRow dr in dt.Rows)
{
if(int.Parse(dr["userID"].ToString()) == userID)
dr.Delete();
}
dt.AcceptChanges();
}
在删除在线用户时如果程序使用了Form认证模式,还应该System.Web.Security.FormsAuthentication.Signout()
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遗留问题,虽然解决了超时注销的问题,但用户直接
来源:http://www.tulaoshi.com/n/20160129/1491503.html
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