Table of Contents
Table of Contents
TreeViewItem Icon

EO.Wpf TreeView offers built-in icon support. To display an icon for a TreeViewItem, simply set the TreeViewItem's Icon property. Icon can be an image, a shape, or anything that can be displayed with a ContentPresenter. The following sample demonstrated both using an EO.Wpf.Bitmap and a Rectangle object as item icon.

XAML
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<Window x:Class="Test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:eo="http://schemas.essentialobjects.com/wpf/"
        Title="MainWindow" Height="250" Width="350">
    <StackPanel>
        <eo:TreeView Width="200" Height="200" HorizontalAlignment="Left">
            <eo:TreeViewItem Header="Colors">
                <eo:TreeViewItem.Icon>
                    <eo:Bitmap Source="pack://application:,,,/Images/colors.png"></eo:Bitmap>
                </eo:TreeViewItem.Icon>
                <eo:TreeViewItem Header="Red">
                    <eo:TreeViewItem.Icon>
                        <Rectangle Width="16" Height="10" Fill="Red"></Rectangle>
                    </eo:TreeViewItem.Icon>
                </eo:TreeViewItem>
                <eo:TreeViewItem Header="Green">
                    <eo:TreeViewItem.Icon>
                        <Rectangle Width="16" Height="10" Fill="Green"></Rectangle>
                    </eo:TreeViewItem.Icon>
                </eo:TreeViewItem>
                <eo:TreeViewItem Header="Blue">
                    <eo:TreeViewItem.Icon>
                        <Rectangle Width="16" Height="10" Fill="Blue"></Rectangle>
                    </eo:TreeViewItem.Icon>
                </eo:TreeViewItem>
            </eo:TreeViewItem>
        </eo:TreeView>
    </StackPanel>
</Window>

The above code uses an EO.Wpf.Bitmap object for the "Colors" item and a Rectangle for the child items. Using the built-in Icon property has the following benefits:

  • No need to define ItemTemplate;
  • Selecting a TreeViewItem will not highlight the icon;

The above code produces the following result: