Question

Just before (or during) rendering page I would like to append a piece of code (java script). However when I try to add new LiteralControl via Page.Controls property I get an error:

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

How to get round that issue?

Answer 1

To avoid that problem do the following:

1. Add a <asp:Placeholder id="Placeholder1" runat="server" /> control in your ASPX

2. In code behind add the control to the Controls collection of that placeholder:

   Placeholder1.Controls.Add(myControl);