CODEWITHSUNDEEP
c#asp.net-mvcowin
Antonin Jelinek
Antonin Jelinek

Reputation: 2317

Can I use OwinContext to share data across single ASP.NET MVC5 application?

I'd like to have specific static data (site menu DTO in particular) shared across all application requests. In the old system.web.dll days, that would be adding data in Application_Start into HttpContent.Current.Application[] dictionary. I'm sure very similar can be achieved with Owin / OwinContext but cannot find the easy way how to add it / access it. Can anyone help?

Upvotes: 2

Views: 1343

Answers (1)

Erik Philips
Erik Philips

Reputation: 54628

The Microsoft.AspNet.Identity.Owin library contains the class OwinContextExtensions which has the following methods:

public static T Get<T>(this IOwinContext context)
{
  if (context == null)
  {
    throw new ArgumentNullException("context");
  }
  return context.Get<T>(OwinContextExtensions.GetKey(typeof(T)));    
}


public static T Set<T>(this IOwinContext context, T value)
{
  if (context == null)
  {
    throw new ArgumentNullException("context");
  }
  return context.Set<T>(OwinContextExtensions.GetKey(typeof(T)), value);
}

I'm pretty sure you can use these to set and get values stored in the OwinContext. Notice that the key name of the object stored in the context is the type, so for collections you should create a concrete type for the unique name:

public MyDictionary : Dictionary<string, int>
{
}

var myDic = new MyDictionary();

var context = HttpContext.GetOwinContext();

context.Set(myDic);

var myDic2 = context.Get<MyDictionary>();

Upvotes: 2

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