能見度=在DockPanel中

我試圖讓下面的TextBlocks成爲摺疊的崩潰不能正常工作，但它不工作：能見度=在DockPanel中

<DockPanel Grid.Column="1" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" LastChildFill="False" > 
<DockPanel.Resources> 
    <Style x:Key="ReferenceValues" TargetType="{x:Type TextBlock}"> 
     <Style.Triggers> 
      <Trigger Property="Text" Value=""> 
       <Setter Property="Visibility" Value="Collapsed" /> 
      </Trigger> 
      <Trigger Property="Text" Value="{x:Null}"> 
       <Setter Property="Visibility" Value="Collapsed" /> 
      </Trigger> 
     </Style.Triggers> 
    </Style> 
</DockPanel.Resources> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropFullName}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropTitle}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropUserName}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropYear}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropEmailAddress}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropStartingPage}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropEndingPage}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropStartingDate}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropEndingDate}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropLastUpdate}" Margin="2,2,2,2" Visibility="Visible"/> 
<TextBlock Style="{StaticResource ReferenceValues}" FontFamily="Segoe UI Light" FontSize="14" DockPanel.Dock="Top" Text="{Binding PropFileFormat}" Margin="2,2,2,2" Visibility="Visible"/> 
... 
</DockPanel>

他們只是顯示爲白色的空間，當值null或"" 。 DockPanel自動不呈現不顯示的控件嗎？（只有3個TextBlocks可以容納72個像素。）

來源

2013-01-04 JosephGarrone

屬性的值由依賴項屬性值優先級確定。看到這個鏈接從MSDN - http://msdn.microsoft.com/en-us/library/ms743230.aspx – Manish

每個TextBlock上的可見性屬性的顯式設置將覆蓋樣式。刪除Visibility="Visible"屬性，TextBlocks將根據您的樣式按預期進行渲染。

如果你想默認的可見性是可見的，則設置在樣式默認：

<Style x:Key="ReferenceValues" TargetType="{x:Type TextBlock}"> 
    <Setter Property="Visibility" Value="Visible" /> 
    <Style.Triggers> 
     <Trigger Property="Text" Value=""> 
      <Setter Property="Visibility" Value="Collapsed" /> 
     </Trigger> 
     <Trigger Property="Text" Value="{x:Null}"> 
      <Setter Property="Visibility" Value="Collapsed" /> 
     </Trigger> 
    </Style.Triggers> 
</Style>

來源

2013-01-04 05:21:11

啊，好spotting，我從來沒有注意到， –

謝謝，它的工作。已回答和Upvoted。 – JosephGarrone

能見度=在DockPanel中

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