Wpf-so ändern Sie im Listenfeld ItemspanelTemplate mit Trigger

Ich brauche, um die ItemsPanelTemplate Eigenschaft eines ListBox basiert auf einer DependencyProperty auf die Kontrolle. Wie verwende ich die DataTemplateSelector zu tun?

Ich habe so etwas wie:

<ListBox.ItemsPanel>
   <ItemsPanelTemplate>
       <!-- Here I need to replace with either a StackPanel or a wrap panel-->
   </ItemsPanelTemplate>
</ListBox.ItemsPanel>

Hier ( ItemsPanelTemplate Selektor in wpf? ), ist die Verbindung mit Ähnliche Frage. Unten ist mein code, aber es funktioniert nicht:

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <XmlDataProvider x:Key="myXmlDataBase" XPath="/myXmlData">
            <x:XData>
                <myXmlData xmlns="">
                    <Item Name = "CoverSheet" SNo="1"  Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000003.tif"/>
                    <Item Name = "HCFA" SNo="2" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000004.tif"/>
                    <Item Name = "HCFA" SNo="3" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000004.tif"/>
                    <Item Name = "HCFA" SNo="4" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000004.tif"/>
                    <Item Name = "HCFA" SNo="5" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000004.tif"/>
                    <Item Name = "HCFA" SNo="6" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000004.tif"/>
                    <Item Name = "HCFA_CC" SNo="7" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\00000005.tif"/>
                    <Item Name = "FrontPage" SNo="8" Type="GrpBX" Image="C:\Work\00288511851128436163\N12201_0003_003\N12201_0003_003I00.tif"/>
                </myXmlData>
            </x:XData>
        </XmlDataProvider>            
    </Window.Resources>

    <DockPanel>
        <ListBox Name="lv" ItemsSource="{Binding Source={StaticResource myXmlDataBase},XPath=Item}" FontSize="12" Background="LightGreen" ItemsPanel="{Binding RelativeSource={RelativeSource Self}, Path=Background}">
             <ListBox.Resources>                    
                 <Style x:Key="ListBoxWrapStyle" TargetType="ListBox">
                     <Setter Property="ItemsPanel">
                         <Setter.Value>
                             <ItemsPanelTemplate>
                                 <WrapPanel Width="{Binding FrameworkElement.ActualWidth),RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}" ItemWidth="{Binding (ListView.View).ItemWidth, RelativeSource={RelativeSource AncestorType=ListView}}" ItemHeight="{Binding (ListView.View).ItemHeight, RelativeSource={RelativeSource AncestorType=ListView}}" />
                             </ItemsPanelTemplate>
                         </Setter.Value>
                     </Setter>
                 </Style>

                 <Style x:Key="ListBoxHorizontalStackStyle" TargetType="ListBox">
                     <Setter Property="ItemsPanel">
                         <Setter.Value>
                             <ItemsPanelTemplate>
                                <StackPanel  Width="{Binding (FrameworkElement.ActualWidth),RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}" Orientation="Horizontal" />
                             </ItemsPanelTemplate>
                         </Setter.Value>
                     </Setter>
                 </Style>

                 <Style x:Key="ListBoxVerticalStackStyle" TargetType="ListBox">
                     <Setter Property="ItemsPanel">
                         <Setter.Value>
                             <ItemsPanelTemplate>
                                 <StackPanel Width="{Binding (FrameworkElement.ActualWidth),RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}" Orientation="Vertical" />
                             </ItemsPanelTemplate>
                         </Setter.Value>
                     </Setter>
                 </Style>
             </ListBox.Resources>

             <ListBox.Style>
                 <Style TargetType="ListBox">
                     <Style.Triggers>
                         <!-- Your Trigger.. -->
                         <Trigger Property="Background" Value="Green">
                             <Setter Property="ItemsPanel" Value="{StaticResource ListBoxVerticalStackStyle}"/>
                         </Trigger>

                         <Trigger Property="Background" Value="LightBlue">
                             <Setter Property="ItemsPanel" Value="{StaticResource ListBoxHorizontalStackStyle}"/>
                         </Trigger>

                         <Trigger Property="Background" Value="LightGreen">
                             <Setter Property="ItemsPanel" Value="{StaticResource ListBoxWrapStyle}"/>
                         </Trigger>
                      </Style.Triggers>
                 </Style>
             </ListBox.Style>

             <ListBox.ItemTemplate>
                 <DataTemplate>
                     <Viewbox Stretch="Fill" HorizontalAlignment="Stretch" >
                         <Border BorderThickness="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" DataContext="{Binding}" BorderBrush="IndianRed"   Margin="0" Height="Auto">
                            <DockPanel>
                                <Image 
                                    DockPanel.Dock="Top"
                                    Width="150" Margin="5"
                                    HorizontalAlignment="Stretch"
                                    VerticalAlignment="Stretch"
                                    Height="Auto"  x:Name="Myimage" 
                                    RenderOptions.BitmapScalingMode="HighQuality"  Source="{Binding XPath=@Image}">
                                </Image>

                                <Grid>
                                    <TextBlock Text="{Binding XPath=@SNo}" HorizontalAlignment="Center" FontWeight="Normal" FontSize="13" />
                                </Grid>
                            </DockPanel>
                        </Border>
                    </Viewbox>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </DockPanel>
</Window>

Während dieser code ausgeführt, ich bin immer ListBoxVerticalStackStyle'nur.