System.Web.HttpException: The Controls collection cannot be modified because the control contains code blocks

17 November 2008 494 views No Comment

The error occurs when a JavaScript code block is placed in the head of MasterPage. Place the code block in a contentplaceholder to resolve the issue.

<head id=”Head1″ runat=”server”>
<title>Untitled Page</title>
<link href=”StyleSheet.css” rel=”stylesheet” type=”text/css”/>
<asp:ContentPlaceHolder ID=”myPlaceholder” runat=”server”>
<script language=”javascript” type=”text/javascript” src=”<%= Page.ResolveClientURL(“~/javascript/global.js”)%>”></script>
</asp:ContentPlaceHolder>
</head>