Set TreeView with TreeViewItem : TreeView « Windows Presentation Foundation « C# / CSharp Tutorial






<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="200" Width="300">
    <DockPanel LastChildFill="True">
        <DockPanel.Resources>
            <Style TargetType="{x:Type TreeViewItem}">
                <EventSetter Event="Selected" Handler="TreeViewItem_Selected" />
            </Style>
        </DockPanel.Resources>
        <Button Click="Button_Click" DockPanel.Dock="Bottom" Content="Show Selected" MaxHeight="23" MaxWidth="100" />
        <TreeView FontSize="16" Name="tvTree">
            <TreeViewItem Header="A" IsExpanded="True">
                <TreeViewItem Header="1">
                    <TreeViewItem Header="2" />
                    <TreeViewItem Header="3" />
                </TreeViewItem>
                <TreeViewItem Header="B" IsExpanded="True">
                    <TreeViewItem Header="11" />
                    <TreeViewItem Header="22" />
                </TreeViewItem>
            </TreeViewItem>
            <TreeViewItem Header="C">
                <TreeViewItem Header="E">
                    <TreeViewItem Header="111" />
                    <TreeViewItem Header="222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
                <TreeViewItem Header="F">
                    <TreeViewItem Header="1111" />
                    <TreeViewItem Header="2222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
            </TreeViewItem>
        </TreeView>
    </DockPanel>
</Window>

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void TreeViewItem_Selected(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = sender as TreeViewItem;
            if (item == e.OriginalSource)
            {
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
            else
            {
                Console.WriteLine("Parent of selected");
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = tvTree.SelectedItem as TreeViewItem;

            if (item != null)
            {
                MessageBox.Show("Item selected: " + item.Header, Title);
            }
            else
            {
                MessageBox.Show("No item selected", Title);
            }
        }
    }
}
WPF Set Tree View With Tree View Item








24.51.TreeView
24.51.1.TreeView uses SelectedValuePath property to provide a SelectedValue for the SelectedItem.TreeView uses SelectedValuePath property to provide a SelectedValue for the SelectedItem.
24.51.2.TreeView with DataSourceTreeView with DataSource
24.51.3.TreeView And TreeViewItemTreeView And TreeViewItem
24.51.4.Create a Tree and add childrenCreate a Tree and add children
24.51.5.Add Ellipse, TextBlock to a TreeAdd Ellipse, TextBlock to a Tree
24.51.6.Mark Tree node expandableMark Tree node expandable
24.51.7.Bind a TreeView to a data source and use DataTemplate objects to customize the TreeView.Bind a TreeView to a data source and use DataTemplate objects to customize the TreeView.
24.51.8.Handles the Selected event for all TreeViewItemsHandles the Selected event for all TreeViewItems
24.51.9.Set TreeView with TreeViewItemSet TreeView with TreeViewItem
24.51.10.View and Select Items Using a TreeView and Select Items Using a Tree
24.51.11.Get selected tree node itemGet selected tree node item