how to disable controls of master page used in content page while processing some event in asp.net

Question

The following code works fine for disabling content page controls, but how do I disable master page controls?

public void DisableControls(Control control,bool isEnable)
{
    if (control.HasControls())
    {
        foreach (Control c in control.Controls)
        {
            DisableControls(c, isEnable);
        }
    }
    else
    {
        if (control is IPostBackDataHandler && !(control is IPostBackEventHandler))
        {
            if (control is WebControl)
            {
                ((WebControl)control).Enabled = isEnable;
            }
            else if (control is HtmlControl)
            {
                ((HtmlControl)control).Disabled = !isEnable;
            }
        }
    }
}

Answer 1

If you want to disable all the controls on a Master Page, just do the following:

DisableControls(this.Page.Master, isEnable);

Or, if you want to perform the method on a specific MasterPage contorl:

DisableControls(this.Page.Master.FindControl("Panel1"), isEnable);

Update:

Why don't you just put a method on your MasterPage:

public void SetControlEnabledState(bool enabled)
{
   DisableControls(Menu1, enabled);
   DisableControls(Control2, enabled);
}

Then, to access it, just do the following from any page that uses the master page:

((MasterPageName)this.Page.Master).SetControlEnabledState(enabled);