vb.net - disable a direct access to a specific web page in ASP.NET

Question

Is there a trusted way to disable the direct access to an special web page? I mean I want to open it only by clicking on a Button for example. I know I can access to the webpage by using this code but It can not prevent accessing to the web page directly (Pasting the url or typing it):

 Response.Redirect("~/Code.aspx")

Thanks

Answer 1

This is a long shot because I don't have the time to test this now (I can see some downvotes coming already!), but...

In the "Code.aspx" page, check for Session["allowed"]. If the value is not there, end the response.

Next, make another page (from where Code.aspx can be accessed). In this page, set Session["allowed"] and then do a Server.Transfer() to Code.aspx, which will then run OK.

Finally, at the end of processing Code.aspx., remember to clear the Session["allowed"] variable again.

Hope this makes even vague sense :)