ASP.NET Error: The Controls collection cannot be modified because the control contains code blocks
Posted by Max | Posted in Uncategorized | Posted on 28-10-2008
0
I’ve noticed that if you try to add control to the page using Page.Controls.Add() method the following error may occur :
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Just check if following is true on the page causing this error:
- Your page doesn’t have <head> elements with runat="server" attribute
- Your page content is wrapped into form tag with runat="server" attribute