How to access the current [web] page (outside of the current page)?

Question

The situation is this:

I have an abstract class used globally that used to reference a Session variable via a public property. We now want to change its behavior to return a property on a master page.

(By simply changing the guts of this particular property, we hope to avoid doing a lot of rewrites)

This is just a snippet of the class:

   public abstract class AppSession
   {
        public static CaseNumber CurrentCaseNo
        {
            /* OLD METHOD DELETED */

            get
            {
                if (CurrentPage.Master != null)
                 // property on the master page
                  return CurrentPage.Master.CurrentCaseNo;
                else
                  throw new Exception("This page has no master page");
            }
        }
    }

Above, "CurrentPage" is not real/valid. I just wrote that there to show context.

Is this even possible?

Thanks! J

Answer 1

I think that you would need to work with something that took a "page" object in as a parameter, and from there, you could determine if the page that was passed is your master page. And do what you need from there....

But that adds quite a bit of overhead.

The real question here is what are you trying to avoid? Trying to get rid of session and move to viewstate?

Answer 2

Look at the HttpContext.Current object. I believe it's Handler property will return the currently executing page. It would be easier to read a value stored in the Session that pulling it out of a property since the Session is available off of HttpContext.Current.

Answer 3

Building on David's answer, this can be used statically throughout your application:

Page myPage = System.Web.HttpContext.Current.CurrentHandler as Page;

if( myPage != null )
    return ((MyMaster)myPage.Master).CurrentCaseNo;