What are ways to update ASP.NET page from HttpModule? - asp.net

Question

I need to update an ASP.NET page from the HttpModule permanently, or from time to time.
Here is the code of IUpdatablePage interface for our page to be updated:
interface IUpdatablePage
{
void Update( string value );
}
Here is the code of HttpModule, I imagine, can be:
void IHttpModule.Init( HttpApplication application )
{
application.PreRequestHandlerExecute += new EventHandler( application_PreRequestHandlerExecute );
}
void application_PreRequestHandlerExecute( object sender, EventArgs e )
{
this._Page = ( Page )HttpContext.Current.Handler;
}
void HttpModuleProcessing()
{
//... doing smth
IUpdatablePage page = this._Page as IUpdatablePage;
page.Update( currentVaue );
//... continue doing smth
}
Here we:
save the current request page in _Page,
get access to IUpdatablePage interface while processing in HttpModule
call Update function passing some currentValue.
Now the page gets the value in Update function.
public partial class MyPage: System.Web.Page, IUpdatablePage
{
void IUpdatablePage.Update( string value )
{
// Here we need to update the page with new value
Label1.Text = value;
}
}
The question is what are the ways to transmit this value to the webform controls so that they would immediately show it in browser?
I suppose any way of refreshing the page: using UpdatePanel, Timer, iframe block, javascript etc.
NOTE, that the request from the page is being processed in HttpModule while refresh.
Please, help with code samples (I'm a web-beginner).

Answer 1

The way to transfer data between Page and HttpModule is to use Application named static objects, that are identified by session id.
The page is update via UpdatePanel triggered by timer.
The code of HttpModule (simplified):
public class UploadProcessModule : IHttpModule
{
public void Init( HttpApplication context )
{
context.BeginRequest += context_BeginRequest;
}
void context_BeginRequest( object sender, EventArgs e )
{
HttpContext context = ( ( HttpApplication )sender ).Context;
if ( context.Request.Cookies["ASP.NET_SessionId"] != null )
{
string sessionId = context.Request.Cookies["ASP.NET_SessionId"].Value;
context.Application["Data_" + sessionId] = new MyClass();
}
}
}