Silverlight逾時退出怎麼實現？(AuthticationTimeOut)

Silverlight使用者用表單身份認證FormsAuthentication登入以後，如果一定的時間沒有動作（Idle）就逾時退出登入，這樣的功能怎麼實現？（關於Silverlight FormsAuthentication使用者登入，可以參考BusinessApplication，建立一個BusinessApplication即可）。好了，來實現這個逾時退出功能。

新的類FormsWithTimeoutAuthentication繼承FormsAuthentication

public class FormsWithTimeoutAuthentication : FormsAuthentication    {        private DispatcherTimer idleTimer;        private int minutesIdle;        private bool idle;        private bool attached = false;        public FormsWithTimeoutAuthentication()            : this(20)         { }         public FormsWithTimeoutAuthentication(int idleMinutes)         {             IdleMinutesBeforeTimeout = idleMinutes;             idleTimer = new DispatcherTimer();             idleTimer.Interval = TimeSpan.FromMinutes(1);             idleTimer.Tick += new EventHandler(idleTimer_Tick);         }         public int IdleMinutesBeforeTimeout         {             get;             set;         }         protected override LoginResult EndLogin(IAsyncResult asyncResult)         {             var result = base.EndLogin(asyncResult);             if (result.LoginSuccess == true)             {                 if (!attached) AttachEvents();                 minutesIdle = 0;                 idleTimer.Start();             }             return result;         }         protected override LogoutResult EndLogout(IAsyncResult asyncResult)         {             idleTimer.Stop();             return base.EndLogout(asyncResult);         }         private void AttachEvents()         {             attached = true;             Application.Current.RootVisual.MouseMove += new MouseEventHandler(RootVisual_MouseMove);             Application.Current.RootVisual.KeyDown += new KeyEventHandler(RootVisual_KeyDown);         }         private void RootVisual_KeyDown(object sender, KeyEventArgs e)         {             idle = false;         }         private void RootVisual_MouseMove(object sender, MouseEventArgs e)         {             idle = false;         }         private void idleTimer_Tick(object sender, EventArgs e)         {             if (idle == true)             {                 minutesIdle += idleTimer.Interval.Minutes;                 if (minutesIdle >= IdleMinutesBeforeTimeout)                 {                     Logout();                 }             }             else             {                 minutesIdle = 0;             }             idle = true;         }         private void Logout()         {             //這裡是你自己的退出登入代碼，我這裡是調用JS，重新整理頁面而已              HtmlPage.Window.Invoke("RefreshSL", "Invoke");         }     }

修改App.xaml，修改WebContext表單認證模式

 1 <Application 
 2  x:Class="MyAppSL.App"
 3  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 4  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 5  xmlns:app="clr-namespace:MyAppSL"
 6  xmlns:appService="clr-namespace:MyAppSL.Services"
 7  xmlns:Lng="clr-namespace:MyAppSL.Resources" 
 8  xmlns:appsvc="clr-namespace:System.ServiceModel.DomainServices.Client.ApplicationServices;assembly=System.ServiceModel.DomainServices.Client.Web"
 9  Startup="Application_Startup"
10  UnhandledException="Application_UnhandledException">
11 
12  <Application.ApplicationLifetimeObjects>
13  <app:WebContext>
14  <app:WebContext.Authentication>
15  <appService:FormsWithTimeoutAuthentication IdleMinutesBeforeTimeout="2"/>
16  </app:WebContext.Authentication>
17  </app:WebContext>
18  </Application.ApplicationLifetimeObjects>
19 
20  <!--原來是這樣的-->
21  <!--<Application.ApplicationLifetimeObjects>
22  <app:WebContext>
23  <app:WebContext.Authentication>
24  <appsvc:FormsAuthentication />
25  </app:WebContext.Authentication>
26  </app:WebContext>
27  </Application.ApplicationLifetimeObjects>-->
28 
29  </Application>

我這裡配置的Idle兩分鐘就逾時退出登入，可以自己配置逾時時間。實現的效果就是使用者登入Silverlight應用以後，如果一定的時間沒有動作（Idle）就逾時退出登入，返回登入頁面。