Whilst trying to capture the HTML from a Web.UI.Page at design-time (in a UITypeEditor) using the RenderControl method, I noticed that only server controls were being rendered.
So, given this aspx page:
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>WebForm1</title>
</head>
<body>
<form id="form1" runat="server">
Some text
<asp:Label runat="server" ID="label1">label1</asp:Label>
<div>
<cc1:MyControl ID="MyControl1" runat="server" BorderStyle="Solid" Height="117px" Width="341px" />
</div>
<div style="margin-top:30px;">
<asp:Button ID="Button1" runat="server" Text="Button" />
</div>
</form>
</body>
</html>
The RenderControl method would render 'label1', 'MyControl1' and 'Button1'. The head and all the divs in the form are all ignored.
I decided to look at the control tree for the page at design-time and this is what I got:
Page
Label
MyControl
Button
HtmlForm
LiteralControl
This is what it looks like at run-time:
webform1_aspx
LiteralControl
HtmlHead
HtmlTitle
LiteralControl
HtmlForm
LiteralControl
Label
LiteralControl
MyControl
LiteralControl
Button
LiteralControl
LiteralControl
Any ideas what is happening here?