ASP.Net Control Button PostBack is causing redirection, when I don't want it to at all (print button)

here's how my scenario is created.

I click a button which produces a pdf via iTextSharp.

I then click 'Cancel' on the pop-up dialog.

I navigate to another page via hyperlink.

I then click the 'Back' button on IE8

I then click the button which produces the PDF, th开发者_JAVA技巧en I'm redirected to the page I previously viewed (when I clicked the hyperlink). Which is not intended what so ever.

Here's some code that affects the Response object (code is within print_click event)

Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=ManageWorkforce.pdf");
Response.End();

Anyone have a theory why this is happening?

I have always done this with a generic handler like Greg mentioned. This is also nicer if you want to link to the file from other pages in the future, or save it as a favorite, send it to your friend, etc.

Have you tried using

 Response.Clear();
 Response.ClearHeaders();

to clear any other content that may still be attached to the response content and headers?

Try to put:

<%@ OutputCache NoStore="true" %>

on the aspx page.