ControlTemplate 내에서 컨트롤을 찾을 수 없습니다.

Question

Template.FindName ("Name", templatedParent) 함수를 사용하여 템플릿 내에서 컨트롤에 액세스하려고합니다. 어떤 이유로 그것은 null을 반환합니다. XamlReader를 사용하여 아래 xaml을로드하고 있습니다. 상기 XAML에서

<Window x:Class="WpfApplication2.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:local="clr-namespace:WpfApplication2;assembly=WpfApplication2" 
    xmlns:ice="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" 
    xmlns:igecac="clr-namespace:namespace1;assembly=assembly1" 
    Loaded="Window_Loaded" 
    Title="MainWindow" Height="350" Width="525"> 
<Window.Resources> 
    <Style TargetType="{x:Type igecac:ApplicationContainer}"> 
     <Setter Property="Control.Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="{x:Type igecac:ApplicationContainer}"> 
        <ControlTemplate.Resources> 
         <DataTemplate x:Key="selectedItemTemplate"> 
          <TextBlock Padding="10,10,10,10" Text="{Binding Path=Id}" Background="{DynamicResource PanelBrush}" Width="100" Height="50"> 
       <TextBlock.Foreground> 
       <SolidColorBrush Color="Black" ice:Freeze="True" /> 
       </TextBlock.Foreground> 
          </TextBlock> 
         </DataTemplate> 
         <DataTemplate x:Key="ItemTemplate"> 
          <TextBlock Padding="10,10,10,10" Text="{Binding Path=Id}" Background="{DynamicResource ObjectStrokeBrush}" Width="100" Height="50"> 
       <TextBlock.Foreground> 
       <SolidColorBrush Color="Black" ice:Freeze="True" /> 
       </TextBlock.Foreground> 
          </TextBlock> 
         </DataTemplate> 
        </ControlTemplate.Resources> 
        <Grid Background="{DynamicResource ObjectGradientBrush}"> 
         <Grid.RowDefinitions /> 
         <Grid.ColumnDefinitions> 
          <ColumnDefinition Name="grd1" Width="110" /> 
          <ColumnDefinition Width="50" /> 
          <ColumnDefinition Width="2*" /> 
         </Grid.ColumnDefinitions> 
         <Canvas Margin="0,-7,0,0" Width="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=HostableWidth}" Height="{Binding RelativeSource={RelativeSource Mode=TemplatedParent}, Path=HostableHeight}"> 
          <ContentPresenter Name="PART_HostArea" Content="{Binding Path=SelectedPanel.Document.Editor}" /> 
         </Canvas> 
         <igecac:CustomListBox Name="PART_AssociatedPanels" ItemsSource="{Binding Path=AssociatedPanels}" SelectedItem="{Binding Path=SelectedPanel, Mode=TwoWay}" IsSynchronizedWithCurrentItem="True" HorizontalContentAlignment="Stretch" Background="{DynamicResource ObjectGradientBrush}"> 
          <igecac:CustomListBox.ItemsPanel> 
           <ItemsPanelTemplate> 
            <StackPanel Orientation="Vertical" IsItemsHost="True" /> 
           </ItemsPanelTemplate> 
          </igecac:CustomListBox.ItemsPanel> 
          <igecac:CustomListBox.ItemContainerStyle> 
           <Style TargetType="{x:Type ListBoxItem}"> 
            <Setter Property="ContentControl.ContentTemplate" Value="{StaticResource ItemTemplate}" /> 
            <Setter Property="Control.HorizontalContentAlignment" Value="Stretch" /> 
            <Setter Property="FrameworkElement.Margin" Value="1,1,1,1" /> 
            <Setter Property="Control.Padding" Value="2,2,2,2" /> 
            <Setter Property="UIElement.Visibility" Value="Visible" /> 
            <Style.Triggers> 
             <Trigger Property="Selector.IsSelected" Value="True"> 
              <Setter Property="ContentControl.ContentTemplate" Value="{StaticResource selectedItemTemplate}" /> 
             </Trigger> 
            </Style.Triggers> 
           </Style> 
          </igecac:CustomListBox.ItemContainerStyle> 
         </igecac:CustomListBox> 
         <Grid Name="CloseButton" Margin="-6,-6,0,0" Grid.Column="1" Width="50" Height="40" HorizontalAlignment="Left" Visibility="Visible" VerticalAlignment="Top"> 
          <Grid.RowDefinitions /> 
          <Grid.ColumnDefinitions /> 
          <Rectangle Fill="{DynamicResource ObjectStrokeBrush}" Width="40" Height="25" HorizontalAlignment="Center" VerticalAlignment="Center" /> 
          <Label Content="Close" HorizontalAlignment="Center" VerticalAlignment="Center" /> 
         </Grid> 
         <Grid Name="OpenButton" Margin="-5,-6,0,0" Grid.Column="0" Width="50" Height="40" HorizontalAlignment="Left" Visibility="Hidden" VerticalAlignment="Top"> 
          <Grid.RowDefinitions /> 
          <Grid.ColumnDefinitions /> 
          <Rectangle Fill="{DynamicResource ObjectStrokeBrush}" Width="40" Height="25" HorizontalAlignment="Center" VerticalAlignment="Center" /> 
          <Label Content="Open" HorizontalAlignment="Center" VerticalAlignment="Center" /> 
         </Grid> 
        </Grid> 
        <ControlTemplate.Triggers> 
         <EventTrigger SourceName="CloseButton" RoutedEvent="Mouse.MouseDown"> 
          <EventTrigger.Actions> 
           <BeginStoryboard> 
            <BeginStoryboard.Storyboard> 
             <Storyboard> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PART_AssociatedPanels" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Hidden}" /> 
              </ObjectAnimationUsingKeyFrames> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OpenButton" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}" /> 
              </ObjectAnimationUsingKeyFrames> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CloseButton" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Hidden}" /> 
              </ObjectAnimationUsingKeyFrames> 
             </Storyboard> 
            </BeginStoryboard.Storyboard> 
           </BeginStoryboard> 
          </EventTrigger.Actions> 
         </EventTrigger> 
         <EventTrigger SourceName="OpenButton" RoutedEvent="Mouse.MouseDown"> 
          <EventTrigger.Actions> 
           <BeginStoryboard> 
            <BeginStoryboard.Storyboard> 
             <Storyboard> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="PART_AssociatedPanels" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}" /> 
              </ObjectAnimationUsingKeyFrames> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OpenButton" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Hidden}" /> 
              </ObjectAnimationUsingKeyFrames> 
              <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CloseButton" Storyboard.TargetProperty="(UIElement.Visibility)"> 
               <DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}" /> 
              </ObjectAnimationUsingKeyFrames> 
             </Storyboard> 
            </BeginStoryboard.Storyboard> 
           </BeginStoryboard> 
          </EventTrigger.Actions> 
         </EventTrigger> 
        </ControlTemplate.Triggers> 
       </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
     <Setter Property="igecac:ApplicationContainer.HostableWidth" Value="720" /> 
     <Setter Property="igecac:ApplicationContainer.HostableHeight" Value="590" /> 
    </Style> 
</Window.Resources> 
<Grid> 
    <igecac:ApplicationContainer x:Name="_ae51329a9692472099e1c0ed6b6b7937" 
            Tag="TemplatePart" Width="800" Height="600" 
            HostableWidth="500" HostableHeight="500"> 
    </igecac:ApplicationContainer> 
    <igecac:DecimalKeypad/> 
    <igecac:HexKeypad/> 
</Grid> 

난 ApplicationContainer라는 맞춤 제어가있다. 클래스를 나타내는 코드에서 OnApplyTemplate() 메서드를 재정의하고 위 스타일을 컨트롤에 적용합니다 (x : Key를 정의하지 않아 기본적으로 적용됩니다). XamlReader.Load()에서 OnApplyTemplate()이 호출되지 않은 것을 볼 수 있습니다. 그 떨어져, _ae51329a9692472099e1c0ed6b6b7937.Template에 액세스하려고하면 템플릿에 정의 된 모든 것을 볼 수 있습니다. (템플릿이 올바르게 적용된 것 같아요.)

하지만이 템플릿을 만들 때 .Template.FindName ("PART_HostArea", this) OnApplyTemplate 컨트롤 클래스 (명시 적으로 호출)에서 null을 반환합니다.

Answer 1

GetTemplateChild (ControlName) 해 보셨습니까?