Unrecognized tag prefix or device filter 'asp'

Simon

Hi

I have a vs2005 and I try to put a placeholdercont ent control on header tag
of the master page, for adding extra header on the content page, but I still
have this error when I build: " Unrecognized tag prefix or device filter
'asp' " on tag <asp:contentpla ceholder runat="server"
id="ExtraHeader "></asp:contentplac eholder>.
The page apparently work fine.
Masterpage source:

<%@ Master...
<%@ Register..
<%@ Register...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitl ed Page</title>
<LINK href="..." rel="stylesheet ">
<LINK media=".." rel="stylesheet ">
<LINK media="print" href=".." rel="stylesheet ">
<LINK href="..." rel="stylesheet ">
<LINK href="..." rel="stylesheet ">
<script language="javas cript" src="...."></script>
<asp:contentpla ceholder runat="server"
id="ExtraHeader "></asp:contentplac eholder>
</head>
<body>
</body>
</html>

Content page source:

<%@ Page ....
<asp:Content runat=server ContentPlaceHol derID=ExtraHead er>
<LINK href="extra.css " rel="stylesheet ">
</asp:Content>
Thanks

Simon

Nov 25 '05 #1

Subscribe Reply

5877

MattM

New Member

I had the same problem with master pages in a project I had. I'm pretty sure this is just a bug in Visual Studio as I downloaded code from Microsoft ( http://msdn.microsoft.com/msdnmag/is...20MasterPages/ ) and it matched what I did. Plus the pages still render fine.

To get rid of the errors, simply close the master pages when you build the web site. I did that and the errors magically vanished. It doesn't make me very confident about Visual Studio 2005 though.

Mar 22 '06 #2

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