Winrt VisualTreeHelper on GridView

Question

When I use the visual tree helper to get the children items of a GridView the GridViewItemPresenter only has one child which is the first item in the grid view content. The other items are not retrieved. Any Idea why only the first item in the GridView is retrieved?

public static IEnumerable<DependencyObject> GetChildren(this DependencyObject obj)//obj is GridViewItemPresenter
        {
            var count = VisualTreeHelper.GetChildrenCount(obj);//Count is only 1 but GridView has 4 children??
            for (int i = 0; i < count; i++)
            {
                var child = VisualTreeHelper.GetChild(obj, i);
                yield return child;
            }
        }

Answer 1

Hi ,

Without being 100 % sure perhaps it has to do with the fact that the other children are not loaded yet.

In my case I had a flipview with 7 flipviewitems and inside some grids.

When the XAML page appears only the 3 of them are filled . 

That is why I would suggest to run your code in the loaded event of the page or if the gridview has a loaded event to run your code in there.

For example the list view has a LayoutUpdated where in the ONNavigatedto event I'm doing the below

 this.itemNumbersListView.LayoutUpdated += itemNumbersListView_LayoutUpdated;

 void itemNumbersListView_LayoutUpdated(object sender, object e)
            {
                this.itemNumbersListView.LayoutUpdated -= itemNumbersListView_LayoutUpdated;
              //write your loop
             
            }

Perhaps you might want to try the above.

thank you

Answer 2

GridViewItemPresenter presents one gridviewitem. it isnt the ItemsPanel. it the template of the GridViewItem

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Microsoft Certified Solutions Developer - Windows Store Apps Using C#

Answer 3

Good Point. I will check that out.

Answer 4

I am running my code from the Page Loaded event.