![]() ![]() Gets or sets the name of the service field in a data source that contains unique values. Gets or sets the name of a data source field assigned to the TreeViewControl. The TreeViewControl can display information in a tree from a self-referential (flat) or hierarchical data structure. It's important to add Mode=TwoWay to the binding, otherwise it won't work.If you want to display multi-column data, use the TreeListControl. To use the EnhancedTreeView all you need is to bind the SelectedObject / /// protected override void OnSelectedItemChanged / /// When the selected item is updated from inside the tree, /// this method will update the "SelectedObject" property. if the given item wasn't found here: return false If (SelectItem(childItemsControl, itemToSelect)) if the item to select is not directly under "parent", // search the child nodes of "parent" if ( > 0)įoreach ( object childItem in parent.Items) if the item to select is directly under "parent", // just select it if (childTreeNode != null) ( ItemsControl parent, object itemToSelect) / /// /// /// private static bool SelectItem # endregion /// /// Searches the given item in the parent (recursively) /// and selects it, returns true if the item was found /// and selected, false otherwise. SelectItem(treeView, eventArgs.NewValue) If (!ReferenceEquals(treeView.SelectedItem, / /// /// private static void SelectedObjectChangedCallbackĭependencyPropert圜hangedEventArgs eventArgs)ĮnhancedTreeView treeView = (EnhancedTreeView)obj ![]() / /// This method is called whenever ever the selected /// object is changed, and if it was changed from the /// outside, this method will set the selected item. / /// Gets or sets the select object (a writable version of /// the "SelectedItem" property) /// New PropertyMetadata(SelectedObjectChangedCallback)) # region SelectedObject /// /// The dependency property that allows use to bind the /// "SelectedObject" property /// public static readonly DependencyProperty ItemsContainerGenerator to find the matching TreeViewItem for the object IĪnd here's the final code: /// /// This treeview class allows databinding the /// "SelectedObject" property /// public class EnhancedTreeView : TreeView Some more googling brought me to this blog post which uses the SelectedObjectChangedCallback) and when the property was changed I needed toĬhange the selected item but, alas again!, the selected item is I added a callback to the dependency-property-changed event (see Very smooth so I added the SelectedObject property. Now that I knew what I had to do, I started writing the EnhancedTreeView classĪt first I thought about overriding the SelectedItem property but it didn't go Learn what are dependency properties and how do they work again, some googlingīrought me to this post which I think gives a very good explanation of ![]() In the code I noticed a lot of dependency properties, and I figured its time to Understanding I decided to write my own (and use Philip's TreeView as ViewModel but, alas, the TreeView's "SelectedItem" property isĪfter some googling I found the Versatile TreeView by Philip Sumi whichĪdds the property I wanted, but since I'm learning WPF and want a deeper Property of the TreeView control to the "SelectedItem" property of its In a new WPF application I'm writing I needed to bind the "SelectedItem" ![]()
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