如何访问HttpContext.Current.Application

Question

Hello i have problem accessing HttpContext.Current.Application From global.asax its seems to be null every time i try to access it. How can i to this?

HttpContext.Current.Application.Lock();
HttpContext.Current.Application["Actions"] = "hello";
HttpContext.Current.Application.UnLock();

Thanks

Answer 1

In Global.asax, you're not in an actual request, so there's no current request nor context you can go by. However, the Global class is a subclass of HttpApplication, so just use 'this', like:

this["Actions"]

Answer 2

You need to turn on access to the Application instance object in your web.config file like so:

<system.serviceModel>
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
</system.serviceModel>

Be sure to include a reference to System.Web.

Answer 3

From MSDN

To get the HttpApplication object for the current HTTP request, use ApplicationInstance. (ASP.NET uses ApplicationInstance instead of Application as a property name to refer to the current HttpApplication instance in order to avoid confusion between ASP.NET and classic ASP. In classic ASP, Application refers to the global application state dictionary.)