ASP.NET

public class MyBasePage : System.Web.UI.Page
{


    public ArrayList controlList = new ArrayList();
    protected override void OnLoad(EventArgs e)
    {

        ListControlCollections();
        base.OnLoad(e);
    }
    public void ListControlCollections()
    {
        ArrayList controlList = new ArrayList();

        AddControls(Page.Controls, controlList);

        foreach (string str in controlList)
        {
            Response.Write(str + "<br/>");
        }
        Response.Write("Total Controls:" + controlList.Count);
    }

    public void AddControls(ControlCollection page, ArrayList controlList)
    {
        foreach (Control c in page)
        {

           
            if (((c.ID != null) && (c.GetType().ToString().IndexOf("WebControl") >= 0)) || (c.GetType().ToString().IndexOf("CalendarControl") >= 0 || (c.GetType().ToString().IndexOf("OrienControls") >= 0)))
            {
                controlList.Add(c.ID);
            }

            if (c.HasControls())
            {
                AddControls(c.Controls, controlList);
            }
        }
    }
       
	public MyBasePage()
	{
		//
		// TODO: Add constructor logic here
		//
	}
}