3/25/2023 0 Comments Wpf treeview selecteditem![]() NOTE: By doing this, I don't kow if the property can be SET, but it can certainly be used to get the selected item. Var item = e. I would approach this by creating a control that inherits TreeView, and has the SelectedItem property with a dependency property so it can be used in XAML code and bindings. The basic principle is to implement two extra properties on your data class: IsExpanded and IsSelected. Private void OnPropertåhanged(PropertåhangedEventArgs e)Īnd Finally: private void TreeViewControl_SelectedItemChanged(object sender, RoutedPropertåhangedEventArgs e) You can use breakpoint then see those properties value and type in Visual Studio's watch. #endregion // INotifyPropertåhanged MembersĪnd: public class Item: HierachicalGroup, INotifyPropertåhanged Try this to get selected item: TreeViewItem item e.NewValue as TreeViewItem Or this to get previously selected item: TreeViewItem item e.OldValue as TreeViewItem e.Source and e.OriginalSource refer to the TreeView not the TreeViewItem selected. This.Propertåhanged(this, new PropertåhangedEventArgs(propertyName)) Protected virtual void OnPropertåhanged(string propertyName) Public event PropertåhangedEventHandler Propertåhanged Public virtual HierachicalGroup Children The SelectedItem property on the TreeView control is a read-only property hence, you cannot explicitly set it. So my question is, how can I keep the SelectedItem of the treeview in sync with my SelectedItem property in my code behind and also how can I reselect an item if the user selects a group? A new set of properties namely SelectedTreeItem have been defined to bind SelectedItem value for TreeViewAdv in MVVM pattern. ![]() This will then cause stack overflow in methods I've tried so far a group) reselect the first Item in that group if the user tries to select an object that isn't an Item (i.e. oViewModel MVVM colors Test WorksTest Works Test not work colors ListBoxItemsSource. For example, the following markup creates a binding between a TextBlock and the selected item in the TreeView. keep SelectedItem in sync with Treeview.SelectedItem I currently have a SelectedItemChanged event handler hooked up to this treeview like so private void TreeViewControl_SelectedItemChanged(object sender, RoutedPropertåhangedEventArgs e) Group 1 (Hierarchical Group) Below is an update with a working example for getting the selected item for a TreeView. I want after MouseRightButtonUp expand selected node and collapse other nodes.
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