Did you try using "Page.IsPostBack" Property?
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"Fred" <email@example.com> wrote in message
news:firstname.lastname@example.org om...> I have an aspx page: Main.aspx which has several components that cause
> a postback. In the page Main.aspx I also have an iframe which contains
> a multi-page pdf file.
> The problem I am facing is that whenever the user does an action which
> causes a postback on the main page Main.aspx, the page posts back and
> the pdf file in the iframe is reloaded. This is a problem becuase if
> the user has rotated or magnified the page then that is lost.
> Is there anyway that the content in the iframe is not refreshed? Any
> other ideas to maintain the state of the pdf file.?
> Thanks a lot!