如何在Sharepoint 2007中获取页面上的所有WebpartZones?

看 http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.webparts.webpartmanager.zones.aspx

if(!string.IsNullOrEmpty(this.SPWebPartManager))
{
    WebPartPage l_oPage = (WebPartPage) this.Page;
    SPWebPartManager l_oManager = (SPWebPartManager) l_oPage.Master.FindControl(this.SPWebPartManager);

    if (l_oManager.DisplayMode.Name.Equals(WebPartManager.BrowseDisplayMode.Name))
    {
        foreach (WebZone zone in l_oManager.Zones)
        {
            // Do something with the zone.
        }
    }
}