ASP.NET HttpApplication local storage

Question

I need some HttpApplication local storage. I thought the ApplicationState was the place for this, but apparently this may be shared across HttpApplication instances in an Appdomain.

   public class MyHttpModule : IHttpModule
    {
        private object initializingLock = new object();

        private static HttpApplication last;

        public void Init(HttpApplication context)
        {
            lock (initializingLock)
            {
                // always is false, as expected
               if (last == context) 
               { 
               }

               // is true for 2nd HttpApplication in AppDomain!
               if (last != null && last.Application == context.Application)                    
               {                   
               }

               last = context;
            }
        }
     }

What's the best blace to use to store some data that's per HttpApplication that other stuff can access?

Answer 1

If you are coding for particular (or controlled set of) web application then you can add whatever state that you need in your HttpApplication in global.asax such as

public class Global : System.Web.HttpApplication
 {
    string MyProperty { get; set;}
    ....

Then in your module, you cast the HttpApplication to Global and access the state. For example,

var myApp = context as Global;
if (null != myApp) 
{
    var value = myApp.MyProperty;
    ...
}