カスタマイズされたDatePickerはカレンダーをポップアップしません

Question

私はdatepickerスタイルをカスタマイズしましたが、何らかの理由でdatepickerをクリックするとカレンダーがポップアップせず、mouseupサブルーチンがアクティブになりません。

私はボタンのx変更する場合：名=「ボタン」ボタンxへ：名前=「PART_Button」カレンダーがポップアップ表示されますが、テキストブロックのコンテンツが表示されます：「表示カレンダー」を

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:controls="clr-namespace:System.Windows.Controls;assembly=PresentationFramework" 
xmlns:iPodConv="clr-namespace:Custom_DatePicker.CustomDateConverter" 
xmlns:vsm="clr-namespace:System.Windows;assembly=PresentationFramework">   
    <Style x:Key="CustomDatePickerStyle" TargetType="controls:DatePicker"> 
     <Setter Property="IsTabStop" Value="False"/> 
     <Setter Property="Background" Value="#FFFFFFFF"/> 
     <Setter Property="Padding" Value="2"/> 
     <!--Setter Property="SelectionBackground" Value="#FF444444"/--> 
     <Setter Property="BorderBrush"> 
      <Setter.Value> 
       <LinearGradientBrush EndPoint=".5,0" StartPoint=".5,1"> 
        <GradientStop Color="#FF617584" Offset="0"/> 
        <GradientStop Color="#FF718597" Offset="0.375"/> 
        <GradientStop Color="#FF8399A9" Offset="0.375"/> 
        <GradientStop Color="#FFA3AEB9" Offset="1"/> 
       </LinearGradientBrush> 
      </Setter.Value> 
     </Setter> 
     <Setter Property="BorderThickness" Value="1"/> 
     <Setter Property="Template"> 
      <Setter.Value> 
       <ControlTemplate TargetType="controls:DatePicker"> 
       <Grid x:Name="PART_Root"> 
        <Grid.Resources> 
         <SolidColorBrush x:Key="DisabledBrush" Color="#8CFFFFFF"/> 
         <ControlTemplate x:Key="DropDownButtonTemplate" TargetType="Button"> 
          <Grid> 
           <vsm:VisualStateManager.VisualStateGroups> 
            <vsm:VisualStateGroup x:Name="CommonStates"> 
             <vsm:VisualStateGroup.Transitions> 
              <vsm:VisualTransition GeneratedDuration="0"/> 
              <vsm:VisualTransition GeneratedDuration="0:0:0.1" To="MouseOver"/> 
              <vsm:VisualTransition GeneratedDuration="0:0:0.1" To="Pressed"/> 
             </vsm:VisualStateGroup.Transitions> 
             <vsm:VisualState x:Name="Normal"/> 
             <vsm:VisualState x:Name="MouseOver"> 
              <Storyboard> 
               <ColorAnimation Duration="0" Storyboard.TargetName="Background" Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)" To="#FF448DCA"/> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[3].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#7FFFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[2].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#CCFFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[1].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#F2FFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
              </Storyboard> 
             </vsm:VisualState> 
             <vsm:VisualState x:Name="Pressed"> 
              <Storyboard> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="Background" Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#FF448DCA"/> 
               </ColorAnimationUsingKeyFrames> 
               <DoubleAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="Highlight" Storyboard.TargetProperty="(UIElement.Opacity)"> 
                <SplineDoubleKeyFrame KeyTime="0" Value="1"/> 
               </DoubleAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[1].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#EAFFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[2].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#C6FFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[3].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#6BFFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
               <ColorAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="BackgroundGradient" Storyboard.TargetProperty="(Border.Background).(GradientBrush.GradientStops)[0].(GradientStop.Color)"> 
                <SplineColorKeyFrame KeyTime="0" Value="#F4FFFFFF"/> 
               </ColorAnimationUsingKeyFrames> 
              </Storyboard> 
             </vsm:VisualState> 
             <vsm:VisualState x:Name="Disabled"> 
              <Storyboard> 
               <DoubleAnimationUsingKeyFrames BeginTime="0" Duration="00:00:00.001" Storyboard.TargetName="DisabledVisual" Storyboard.TargetProperty="(UIElement.Opacity)"> 
                <SplineDoubleKeyFrame KeyTime="0" Value="1"/> 
               </DoubleAnimationUsingKeyFrames> 
              </Storyboard> 
             </vsm:VisualState> 
            </vsm:VisualStateGroup> 
           </vsm:VisualStateManager.VisualStateGroups> 
           <Grid Height="48" HorizontalAlignment="Center" Margin="0" VerticalAlignment="Center" Width="59" Background="#11FFFFFF"> 
            <Grid.ColumnDefinitions> 
             <ColumnDefinition Width="6*"/> 
             <ColumnDefinition Width="30*"/> 
             <ColumnDefinition Width="30*"/> 
             <ColumnDefinition Width="30*"/> 
            </Grid.ColumnDefinitions> 
            <Grid.RowDefinitions> 
             <RowDefinition Height="6*"/> 
             <RowDefinition Height="20*"/> 
             <RowDefinition Height="20*"/> 
             <RowDefinition Height="30*"/> 
            </Grid.RowDefinitions> 
            <Border x:Name="Highlight" Margin="-1" Opacity="0" Grid.ColumnSpan="4" Grid.Row="0" Grid.RowSpan="4" BorderBrush="#FF6DBDD1" BorderThickness="1" CornerRadius="0,0,1,1"/> 
            <Border x:Name="Background" Margin="0,-1,0,0" Opacity="1" Grid.ColumnSpan="4" Grid.Row="1" Grid.RowSpan="3" Background="#FF1F3B53" BorderBrush="#FFFFFFFF" BorderThickness="1" CornerRadius=".5"/> 
            <Border x:Name="BackgroundGradient" Margin="0,-1,0,0" Opacity="1" Grid.ColumnSpan="4" Grid.Row="1" Grid.RowSpan="3" BorderBrush="#BF000000" BorderThickness="1" CornerRadius=".5"> 
             <Border.Background> 
              <LinearGradientBrush EndPoint=".7,1" StartPoint=".7,0"> 
               <GradientStop Color="#FFFFFFFF" Offset="0"/> 
               <GradientStop Color="#F9FFFFFF" Offset="0.375"/> 
               <GradientStop Color="#E5FFFFFF" Offset="0.625"/> 
               <GradientStop Color="#C6FFFFFF" Offset="1"/> 
              </LinearGradientBrush> 
             </Border.Background> 
            </Border> 
            <Rectangle StrokeThickness="1" Grid.ColumnSpan="4" Grid.RowSpan="2" Margin="0,0,0,2"> 
             <Rectangle.Stroke> 
              <LinearGradientBrush EndPoint="0.48,-1" StartPoint="0.48,1.25"> 
               <GradientStop Color="#FF494949"/> 
               <GradientStop Color="#FF9F9F9F" Offset="1"/> 
              </LinearGradientBrush> 
             </Rectangle.Stroke> 
             <Rectangle.Fill> 
              <LinearGradientBrush EndPoint="0.3,-1.1" StartPoint="0.46,1.6"> 
               <GradientStop Color="#FFBD4A40"/> 
               <GradientStop Color="#FFEAAFAF" Offset="1"/> 
              </LinearGradientBrush> 
             </Rectangle.Fill> 
            </Rectangle> 
            <TextBlock 
               HorizontalAlignment="Center" 
               VerticalAlignment="Center" 
               DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=.Content}" 
               Text="{Binding Converter={StaticResource DateTimeFormatter}, ConverterParameter=DOW}" 
               FontSize="11" Margin="0,0,0,3" 
               Grid.Column="0" 
               Grid.ColumnSpan="4" 
               Grid.Row="0" 
               Grid.RowSpan="2" 
               /> 
            <TextBlock 
               HorizontalAlignment="Center" 
               VerticalAlignment="Center" 
               DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content}" 
               Text="{Binding Converter={StaticResource DateTimeFormatter}, ConverterParameter=MMMM}" 
               FontSize="10" Margin="0,10,0,3" 
               Grid.Column="0" 
               Grid.ColumnSpan="4" 
               Grid.Row="1" 
               Grid.RowSpan="2" 
               /> 
            <TextBlock 
               HorizontalAlignment="Center" 
               VerticalAlignment="Bottom" 
               DataContext="{Binding Path=Content, RelativeSource={RelativeSource TemplatedParent}}" 
               Text="{Binding Converter={StaticResource DateTimeFormatter}, ConverterParameter=dd}" 
               FontSize="26" Margin="0,0,0,-3" 
               Grid.Column="0" 
               Grid.ColumnSpan="4" 
               Grid.Row="2" 
               Grid.RowSpan="2" /> 
            <Border x:Name="PART_DisabledVisual" Opacity="0" Grid.ColumnSpan="4" Grid.Row="0" Grid.RowSpan="4" BorderBrush="#B2FFFFFF" BorderThickness="1" CornerRadius="0,0,.5,.5"/> 
           </Grid> 
          </Grid> 
         </ControlTemplate> 
        </Grid.Resources> 
        <Grid.ColumnDefinitions> 
         <ColumnDefinition Width="*"/> 
         <ColumnDefinition Width="Auto"/> 
        </Grid.ColumnDefinitions> 
        <vsm:VisualStateManager.VisualStateGroups> 
         <vsm:VisualStateGroup x:Name="CommonStates"> 
          <vsm:VisualState x:Name="Normal"/> 
          <vsm:VisualState x:Name="Disabled"> 
           <Storyboard> 
            <DoubleAnimation Duration="0" Storyboard.TargetName="DisabledVisual" Storyboard.TargetProperty="Opacity" To="1"/> 
           </Storyboard> 
          </vsm:VisualState> 
         </vsm:VisualStateGroup> 
        </vsm:VisualStateManager.VisualStateGroups> 
        <Button x:Name="Button" Grid.Column="0" Grid.ColumnSpan="4" 
           Content="{TemplateBinding SelectedDate}" 
           Template="{StaticResource DropDownButtonTemplate}" 
           Margin="2,0,2,0" 
           Width="60" 
           BorderBrush="{TemplateBinding BorderBrush}" 
           BorderThickness="{TemplateBinding BorderThickness}" 
           Foreground="{TemplateBinding Foreground}"/> 
        <Grid x:Name="DisabledVisual" IsHitTestVisible="False" Opacity="0" Grid.ColumnSpan="2"> 
         <Grid.ColumnDefinitions> 
          <ColumnDefinition Width="*"/> 
          <ColumnDefinition Width="Auto"/> 
         </Grid.ColumnDefinitions> 
         <Rectangle Fill="#8CFFFFFF" RadiusX="1" RadiusY="1"/> 
         <Rectangle Fill="#8CFFFFFF" RadiusX="1" RadiusY="1" Height="18" Margin="2,0,2,0" Width="24" Grid.Column="1"/> 
        </Grid> 

        <Popup x:Name="PART_Popup" 
          PlacementTarget="{Binding ElementName=Button}" 
          Placement="Bottom" 
          StaysOpen="False" 
          AllowsTransparency="True" 
          PopupAnimation="Slide" 
          Focusable="True" /> 
       </Grid> 
      </ControlTemplate> 
      </Setter.Value> 
     </Setter> 
    </Style> 
</ResourceDictionary> 

すべてのヘルプ感謝されます。

Answer 1

名前の付いた部分（名前が「PART_」で始まるコントロール）を取り除くと、通常は機能が失われます。あなたのケースでは、次のコードでは、日付ピッカーのOnApplyTemplateである：

this._dropDownButton = (base.GetTemplateChild("PART_Button") as Button); 
if (this._dropDownButton != null) 
{ 
    this._dropDownButton.Click += new RoutedEventHandler(this.DropDownButton_Click); 
    this._dropDownButton.AddHandler(UIElement.MouseLeaveEvent, new MouseEventHandler(this.DropDownButton_MouseLeave), true); 
    if (this._dropDownButton.Content == null) 
    { 
     this._dropDownButton.Content = SR.Get("DatePicker_DropDownButtonName"); 
    } 
} 

あなたは日付ピッカーがnullの場合は、コンテンツを設定し、クリックハンドラを登録していることがわかります。後者はポップアップを開きます。

今、OnApplyTemplateが呼び出されると、SelectedDateがおそらくnullになるため、DatePickerがボタンの内容を設定するのはこのためです。 DatePickerがContentを設定できないようにするには、SelectedDateがnullでないことを確認する必要があります。

一つの方法は、{Binding RelativeSource={RelativeSource TemplatedParent}, Path=SelectedDate, TargetNullValue="1/1/2011"}ようなものを使用される可能性がありますが、あなたは、長い構文を使用する必要があります：私は今、ほぼ2週間のためにこれを理解しようとして壁に頭を叩きされている

xmlns:system="clr-namespace:System;assembly=mscorlib" 
<!-- ... --> 
<Binding RelativeSource="{RelativeSource TemplatedParent}" Path="SelectedDate"> 
    <Binding.TargetNullValue> 
     <system:DateTime>1/1/2011</system:DateTime> 
    </Binding.TargetNullValue> 
</Binding>