Some controls cannot RenderControl

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Hi group,

I'm trying to get the outputted html from some specific controls on a page, and I'm finding that some controls will render fine, while others will throw the error that "[control] must be placed inside a form tag with runat=server." For example, a label control will render fine, but a button will not. It seems that any control that has a server-side click event will not accept being rendered in this way. Does anyone know what I can do to get such controls to render? Here's my code:

aspx snippet:

<form id="f" runat="server">
<div>
<asp:Label ID="control" runat="server" Text="Chage to an asp:Button" />
</div>
</form>


..cs snippets:

using System;
using System.Web.UI;
using System.IO;

// ...

using (StringWriter sw = new StringWriter())
{
HtmlTextWriter htw = new HtmlTextWriter(sw);
control.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}

Thanks for any help.

Joshua C

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