private void TestTreeView_Expanding(TreeView sender, TreeViewExpandingEventArgs args)
{
var loadingNode = args.Node;
if (loadingNode == _virtualizedNode)
{
loadingNode.Children.Add(new TreeViewNode()
{
Content = "Loaded: 1"
});
loadingNode.Children.Add(new TreeViewNode()
{
Content = "Loaded: 2"
});
loadingNode.Children.Add(new TreeViewNode()
{
Content = "Loaded: 3"
});
loadingNode.HasUnrealizedChildren = false;
Results.Text = "Loaded";
}
}
private void ContentModeTestTreeView_Expanding(TreeView sender, TreeViewExpandingEventArgs args)
{
var loadingItem = args.Item as TreeViewItemSource;
var count = TestTreeViewItemsSource[0].Children.Count;
if (loadingItem == TestTreeViewItemsSource[0].Children[count - 1])
{
loadingItem.Children.Add(new TreeViewItemSource()
{
Content = "Loaded: 1"
});
loadingItem.Children.Add(new TreeViewItemSource()
{
Content = "Loaded: 2"
});
loadingItem.Children.Add(new TreeViewItemSource()
{
Content = "Loaded: 3"
});
loadingItem.HasUnrealizedChildren = false;
Results.Text = "Loaded";
}
}
private void DirectoryView_Expanding(Microsoft.UI.Xaml.Controls.TreeView sender, Microsoft.UI.Xaml.Controls.TreeViewExpandingEventArgs args)
{
if (args.Node.HasUnrealizedChildren)
{
ItemViewModel.FillTreeNode(args.Item, sender);
}
}