TreeView and GridView

[Silvio Silva Junior]

Hello.

I would like to use this example:
http://www.telerik.com/community/code-library/aspnet-ajax/general/drag-and-drop-between-radgrid-and-radtreeview.aspx

but, I have a customized Master Page, with no TreeView like the sample, so, I tryed to put the code of Default.aspx (that is the TreeView and GridView together) in a page with my Master Page linked, and the code behind in Default.aspx.cs. But, I got this error:

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

Anyone knows why?

Regards.

[Silvio Silva Junior]

For a better understand.

I tryed to use the page Default.aspx/Default.aspx.cs of:

http://www.telerik.com/community/code-library/aspnet-ajax/general/drag-and-drop-between-radgrid-and-radtreeview.aspx

and, link it with a empty master page, but I got this error:

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

I tryed to change the chars: <%= for <%#

but I it didn't work.

What's the best option?

[Princy]

Hello Silvio,

If you have code block inside head tag, then you need to move the code block (i.e. <% ... %>) outside of the head tag.
Go through the following documentations for more information on this.
General Troubleshooting
RadCodeBlock and RadScriptBlock

Regards,
Princy.