The second argument is the TreeView.Īs each item is found, that item is expanded, and the final item is returned, where the caller can select it. This function takes a stack of nodes where the first one out of the stack is the top most node, and each subsequent node on the stack is a child of the previous parent. You need to walk the tree from top to bottom, looking for the tree item at each level, expanding and updating the layout along the way. The others failed for me in various ways. It's a bit of a dirty solution (and probably not the most efficient) and won't work if you're using a virtualized TreeView, because it depends on the existance of the actual visual elements.
#Wpf treeview selecteditem update#
You can select a particular value using the following piece of code: var treeViewItem = VisualTreeExt.GetDescendants(MyTreeView).FirstOrDefault(tvi => tvi.DataContext = newValue) You could update this TextBlock's text manually whenever the TreeView's SelectedItem changes: void treeViewSelectedItemChanged(object sender. When you ask for VisualTreeHelperExt.GetDescendants(MyAmazingTreeView) you'll get all the TreeViewItem childs. Var count = VisualTreeHelper.GetChildrenCount(parent) the statement 'string fileName () ' in the button click event method fills fileName as ' Header:SubSubFile.txt Items.Count:0' instead of 'SubSubFile.txt'.
The TreeView allows changing the selection background color for the selected items by using the SelectionBackgroundColor property. Selected item style Selection background. Public static IEnumerable GetDescendants(DependencyObject parent) where T : DependencyObject When selecting more than one item, the SelectedItem property returns the first selected item, and the CurrentItem property returns the last selected item. I have created a method VisualTreeExt.GetDescendants that returns an enumerable collection of elements that match the specified type: public static class VisualTreeExt Define a style for the TreeViewItems of the tree using the ItemContainerStyle property on the TreeView that binds those properties from the TreeViewItem to your data objects. I found this one in the comments to the Code Project article “WPF TreeView Selection” by DaWanderer. For those who are still looking for the right solution to this problem here is the one below.#Wpf treeview selecteditem code#
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