How do I get IE9 to use standards compliant mode when developing on localhost?

Question

According to MSDN, all I need to force standards compliant mode is to include the HTML 5 doctype:

http://msdn.microsoft.com/en-us/library/gg699338%28v=vs.85%29.aspx<

Answer 1

I had this same problem. I had the HTML5 doctype on my aspx file, but it still rendered in IE7 mode. I fixed it without setting HTML4.01 Strict, and without meta http-equiv.

My problem was that I had an ASP tag, then the doctype in a separate line. IE9 wants the doctype to be on line 1 and nowhere else.

So if you have this:

<%
' some asp code
%>

Consider changing it to this:

<%
' some asp code
%>

This worked for me even with @Import statements before the initial asp block:

<%@ Import Namespace="System.Text.RegularExpressions" %>
<%
' some asp code
%>