问在windows phone 7中，是否可以从另一个xaml页面导航到透视项目？

EN

public enum PivotDef
{
   One,
   Two,
   Three,
   Four,
}

public static PivotDef SelectedPivot;

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
   switch (SelectedPivot)
   {
      case PivotDef.One:
         this.pvtControl.SelectedItem = this.pvt1;
         break;

      case PivotDef.Two:
         this.pvtControl.SelectedItem = this.pvt2;
         break;

      case PivotDef.Three:
         this.pvtControl.SelectedItem = this.pvt3;
         break;

      case PivotDef.Four:
         this.pvtControl.SelectedItem = this.pvt4;
         break;
   }

   base.OnNavigatedTo(e);
}

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
    if (NavigationContext.QueryString.ContainsKey("PivotNada.SelectedIndex"))
    {
        int selectedIndex = -1;
        if(int.TryParse(NavigationContext.QueryString["PivotNada.SelectedIndex"].ToString(), out selectedIndex))
        {
            if(selectedIndex != -1)
            {
                pivot.SelectedIndex = selectedIndex;
            }
        }
    }
}

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
  string strItemIndex;
  if (NavigationContext.QueryString.TryGetValue("goto", out strItemIndex))
  {
    myPivot0.SelectedIndex = Convert.ToInt32(strItemIndex);
  }
  base.OnNavigatedTo(e);
}

NavigationService.Navigate(new Uri("/ContactP.xaml?goto=0", UriKind.RelativeOrAbsolute));