I’m developing a web site that has a master page that consists of 4 different pages that will load simultaneously (using ContentPlaceHolder).
However, when I test the website on my local machine, only one page renders at a time (depending on the URL I type in).
Is there any way that on Page Load, to tell the master (or maybe the browser?) to load all 4 pages instead of only the page that was directly requested from the browser?
A master page doesn’t work like a frameset that you display other pages in, you only display a single page using the frameset.
You can have several content placeholders in the master page, but all content still comes from the same page.
If you want to have the content in separate files, you should create user controls that you can include in a page.