ELK/FrameworkLocal/UIClient/CenterViews/Editors/RecipeSequenceSelectDialogView.xaml

<UserControl x:Class="MECF.Framework.UI.Client.CenterViews.Editors.Sequence.RecipeSequenceSelectDialogView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
             xmlns:micro="clr-namespace:Caliburn.Micro"
             mc:Ignorable="d"
             Width="350"
             Height="500">
    <UserControl.Resources>
        <HierarchicalDataTemplate x:Key="FileTemplate" ItemsSource="{Binding Files}">
            <StackPanel>
                <TextBlock Text="{Binding Name}" />
            </StackPanel>
        </HierarchicalDataTemplate>
    </UserControl.Resources>
    <Border BorderBrush="Gray" BorderThickness="0,1,0,0" Background="{DynamicResource Tab_BG}">
        <Grid Margin="20,30">
            <Grid.RowDefinitions>
                <RowDefinition />
                <RowDefinition Height="auto"/>
            </Grid.RowDefinitions>
            <Border BorderBrush="{DynamicResource Table_BD}" BorderThickness="1" Background="{DynamicResource Table_BG_Content_Highlight}">
                <TreeView x:Name="PART_TREE" Margin="5" ItemsSource="{Binding Files[0].Files}" ItemTemplate="{StaticResource FileTemplate}"
                       VirtualizingPanel.IsVirtualizing="True" VirtualizingPanel.VirtualizationMode="Recycling"
                       Height="{Binding Path=ActualHeight,ElementName=PART_BORDER, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}">
                    <!--Height should add for VirtualizingPanel, otherwise the App will be slow-->
                    <TreeView.ItemContainerStyle>
                        <Style TargetType="{x:Type TreeViewItem}" BasedOn="{StaticResource ResourceKey={x:Type TreeViewItem}}">
                            <Setter Property="IsExpanded" Value="True"></Setter>
                        </Style>
                    </TreeView.ItemContainerStyle>
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="SelectedItemChanged">
                            <micro:ActionMessage MethodName="TreeSelectChanged">
                                <micro:Parameter Value="{Binding SelectedItem, ElementName=PART_TREE}" />
                            </micro:ActionMessage>
                        </i:EventTrigger>
                        <i:EventTrigger EventName="MouseDoubleClick">
                            <micro:ActionMessage MethodName="TreeMouseDoubleClick">
                                <micro:Parameter Value="{Binding SelectedItem, ElementName=PART_TREE}" />
                            </micro:ActionMessage>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </TreeView>
            </Border>
            <StackPanel Grid.Row="1" Margin="0,10,0,0" Orientation="Horizontal" HorizontalAlignment="Center">
                <Button Content="OK" Width="90" Height="30">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="Click">
                            <micro:ActionMessage MethodName="OK">
                            </micro:ActionMessage>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
                <Button Content="Cancel" Margin="10,0,0,0" Width="90" Height="30">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="Click">
                            <micro:ActionMessage MethodName="Cancel">
                            </micro:ActionMessage>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </Button>
            </StackPanel>
        </Grid>
    </Border>
</UserControl>