Is there an ASP.NET WebStatus bar control or ?Please wait? notification message to let the user know that the Web-based application is performing an action, such as loading a page, searching or processing data?
Nope, there isn't. You can resort to showing a modal browser window with a gif or forcedly rendering a "." to the user with:
You would have to put those dots inside a <div> with an id so you can hide it at the body.onload event of the page.
This was first published in October 2003