I assume you are using Internet Explorer right? I used the Network Monitor to observe the http request/response and come to the following conclusion.
When you issue a redirect from the asp.net, a Http 302 is returned from IIS. If you original request is a get method, I.E will issue another get to get the pdf file and the result you get is correct. I get the pdf displayed correctly in IE. If you method is a post, according to the spec http://www.w3c.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3 and if IE warn if form is redirected is checked in the advanced setting , the browser should not re-direct but must warn you before the redirection. On my IE , this is not a case, using Network Monitor , a Get to get the pdf is issued but did not complete(about 30 tcp frame returned from IIS) the full download of the pdf file, as a result the acrobat reader will issue an error message and display a blank page. Since IE issues the a get when it received the Http 302 after the post method, I figure out that if the PDF file is small enough, it will not have the error, so I use a 5K PDF and it confirms my observation. So my conclusion is that it's a bug in IE. By the way, Mozilla 1.0/Netscape 6.2 do not seems to be have this problem with post or get methods. Hope this is a correct observation :-). Time to sleep after spending somtime looking at the Http packets :-(. Best Regards, Hun Boon Teo 03:09AM (GMT+0800) 12/07/2002 >From Singapore You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
