Question

每当我尝试将面板添加到以下网格时，边框都不会显示，带有文本的堆栈面板会消失，我不明白为什么这是代码在我尝试向整个网格添加边框之前的样子。

  <Grid Name="grdContext" Grid.Column="2" Height="Auto" Width="Auto" Margin="0" >
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="6*"/>
            <RowDefinition Height="2*"/>
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Height="Auto" Width="Auto" HorizontalAlignment="Center" Orientation="Vertical">
            <TextBlock Name="lblDate" Foreground="White" Background="Black" FontSize="14" HorizontalAlignment="Center"  Margin="5,5,5,2.5">07/01/2016</TextBlock>
            <TextBlock Name="lblTime"  Foreground="White" Background="Black" FontSize="14" HorizontalAlignment="Center"  Margin="5,2.5,5,5">14:27</TextBlock>
        </StackPanel>
        <Image Name="imgArchive" Grid.Row="2" Width="Auto" Height="Auto" Stretch="UniformToFill" Margin="0,0.4,10,10"/>
    </Grid>

这是在

之后

<Border BorderBrush="DimGray" BorderThickness="3">
      <Grid Name="grdContext" Grid.Column="2" Height="Auto" Width="Auto" Margin="0" >
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="6*"/>
            <RowDefinition Height="2*"/>
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Height="Auto" Width="Auto" HorizontalAlignment="Center" Orientation="Vertical">
            <TextBlock Name="lblDate" Foreground="White" Background="Black" FontSize="14" HorizontalAlignment="Center"  Margin="5,5,5,2.5">07/01/2016</TextBlock>
            <TextBlock Name="lblTime"  Foreground="White" Background="Black" FontSize="14" HorizontalAlignment="Center"  Margin="5,2.5,5,5">14:27</TextBlock>
        </StackPanel>
        <Image Name="imgArchive" Grid.Row="2" Width="Auto" Height="Auto" Stretch="UniformToFill" Margin="0,0.4,10,10"/>
    </Grid>
</Border>

当我走出边境时，什么都看不到？

Answer 1

正如Slyvain注意到的那样，你打破了视觉树。

在您的第一个代码示例中

MainGrid
column 0 asign foo
column 1 asign fooo
column 2 asign grdContext

第二个样本

MainGrid
column 0 asign foo
column 1 asign fooo
Border?

边框没有显示和堆栈面板消失

1 个答案: