Webforms - Changing The Form Action Paramter?

Jul 22, 2010

I have an odd problem. I have a page called search.aspx. When the search button is clicked, the user is supposed to be redirected to another website. The redirection code is in one of the postback events.

Here is the form code:

<form id="form1" runat="server" onsubmit="return CheckSearchBox();" action="http://mysearch.company.com/default.aspx" method="post" target="_top" >

I have this same code deployed in two environments. Working Environment It has .NET 2.0 and 3.0, but no service packs. Here is how the source is rendered:

<form name="form1" method="post" action="search.aspx" id="form1" onsubmit="return CheckSearchBox();" target="_top">

Broken Environment

It has .NET 2.0 sp2 and 3.0 sp1.
This is how the same code is rendered:

<form name="form1" method="post" action="http://mysearch.company.com/default.aspx" id="form1" onsubmit="return CheckSearchBox();" target="_top">

Notice that the rendered "action" is different. So, I have a few questions.

Why would ASP.NET change the action in one situation, but not the other?
Why would ASP.NET change the action at all?
Is there some sort of configuration I can make so that it always changes the action to "search.aspx"? (We haven't changed this code in years, and nobody wants to touch it.)

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