Question

I have this in an ASP.Net Master Page:

 <script language="javascript" type="text/javascript">
        <asp:ContentPlaceHolder ID="scriptContentHolder" runat="server"></asp:ContentPlaceHolder>
    </script>

But when I try to view the content page in design mode it tells me there is an error in the associated Master page because “scriptContentHolder” does not exist.

<asp:Content ID="scriptContent" ContentPlaceHolderID="scriptContentHolder" runat="server">
    g_page = "mnuSurveys";
</asp:Content>

If I change the Master page to this:

<asp:ContentPlaceHolder ID="scriptContentHolder" runat="server"></asp:ContentPlaceHolder>

and the content page to this:

<asp:Content ID="scriptContent" ContentPlaceHolderID="scriptContentHolder" runat="server">
<script language="javascript" type="text/javascript">
    g_page = "mnuSurveys";   
    </script>
</asp:Content>

Then all is cool. Why is this? The page compiles and executes just fine… but as above the designer squawks when placing ContentPlaceHolder controls within tags.

Answer 1

According to this MS Connect posting as of May ’09, the

VS designer doesn’t support controls
within script blocks. Alternately, you
can call
Page.ClientScriptManager.RegistgerClientScriptBlock
from content page

[sic]

So you’ll have to use the second/work around method you posted.