Question

I have a control that can be placed in a Web form (.aspx) or a Master Page (.master). I want it to function differently depending on which one it’s in.

My first thought is to climb the control tree back to the root and see if I cross over a MasterPage control. If so, then it would have to be in the Master Page.

But, this seems inefficient. Is there a better way?

Answer 1

First check if the page has a master page at all. Then go through the control tree to look for a content place holder:

public static bool IsInMaster(Control control) {     if (control.Page.Master == null) return false;     while (control != null) {         if (control is ContentPlaceHolder) return false;         control = control.Parent;     }     return true; }