[转][MVC]处理Session Timeout
Session Timeout導回登入頁面這樣的功能大家應該並不陌生,
而處理Session Timeout也有很多方式(也不一定要導回登入頁面),
可以使用client script固定時間輪詢Server(callback)不讓Session Timeout也是一種方法,
在MVC中個人較愛操作Action Filters(比較能展現MVC在設計上的特性~XD),
這裡自己紀錄一下。
新增自訂類別並繼承ActionFilterAttribute
public class CheckSessionFilterAttribute : ActionFilterAttribute
{
public override void OnActionExecuting( ActionExecutingContext filterContext )
{
HttpContext httpcontext = HttpContext.Current;
// 確認目前要求的HttpSessionState
if( httpcontext.Session != null )
{
//確認Session是否為新建立
if( httpcontext.Session.IsNewSession )
{
//確認是否已存在cookies
String sessioncookie = httpcontext.Request.Headers[ "Cookie" ];
if( ( sessioncookie != null ) && ( sessioncookie.IndexOf( "ASP.NET_SessionId" ) >= 0 ) )
{
Logon( filterContext );
}
}
}
base.OnActionExecuting( filterContext );
}
private void Logon( ActionExecutingContext filterContext ){RouteValueDictionary dictionary = new RouteValueDictionary
( new
{controller = "Account",
action = "Logon",
returnUrl = filterContext.HttpContext.Request.RawUrl} );filterContext.Result = new RedirectToRouteResult( dictionary );
}}Controller
public ActionResult Index()
{Session[ "mytime" ] = DateTime.Now.ToString();
ViewData[ "Message" ] = Session[ "mytime" ] as String;return View();
}[CheckSessionFilterAttribute]//自訂Action Filters
public ActionResult About()
{return View();
}
Web.config
設定2分鐘Session timeout。
結果:
2分鐘過後點擊About。
導回登入頁面。