private void GridView_ItemClick(object sender, ItemClickEventArgs e)
 {
     _page             = 1;
     _selectCategroies = e.ClickedItem as subcateModel;
     txt_Header.Text   = _data.categories.cateTitle + " " + _selectCategroies.cateTitle;
     LoadSongs();
 }
 protected override void OnNavigatedTo(NavigationEventArgs e)
 {
     base.OnNavigatedTo(e);
     if (e.NavigationMode == NavigationMode.New)
     {
         _data             = (e.Parameter as object[])[0] as MusicHomeSongTypeModel;
         _selectCategroies = _data.categories.subcate[0];
         gv.ItemsSource    = _data.categories.subcate;
         txt_Header.Text   = _data.categories.cateTitle + " " + _selectCategroies.cateTitle;
         _sort             = 0;
         _page             = 1;
         LoadSongs();
     }
 }