带有ScrollViewer和VerticalScrollBarVisibility的弹出窗口=自动在3.5sp1中无法正确显示 [英] Popup with ScrollViewer and VerticalScrollBarVisibility=Auto not displaying correctly in 3.5sp1

问题描述

如果我有一个包含ScrollViewer的Popup，并且我设置了VerticalScrollBarVisibility = Auto，则如果需要滚动条，则Popup的大小将不正确.看来它已在4.0中修复. (至少我的测试用例在2010年有效，而在2008年无效)，但是 我希望2008年有一个解决方法，因为我现在还不能移动到2010年.这是一些显示问题的XAML示例

If I have a Popup which contains a ScrollViewer and I set VerticalScrollBarVisibility=Auto, if the scroll bar is required the Popup is not sized correctly. This looks like it was fixed in 4.0  ( at least my test case works in 2010 and not 2008 ) but I'm hoping there's a workaround for 2008 since I can't move to 2010 yet. Here's some example XAML which shows the issue

<Window 
 x:Class="CommandTest.Window1"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 xmlns:local="clr-namespace:CommandTest"
 Title="Window1" Height="300" Width="300">
 <Grid>
  <ToggleButton x:Name="button" VerticalAlignment="Center" HorizontalAlignment="Center">Press Me</ToggleButton>
  <Popup StaysOpen="False" IsOpen="{Binding ElementName=button, Path=IsChecked}" PlacementTarget="{Binding ElementName=button}" Placement="Right">
   <Border 
    BorderBrush="DimGray" 
    Background="LightBlue" 
    Padding="3" 
    Grid.IsSharedSizeScope="True">
    <ScrollViewer VerticalScrollBarVisibility="Auto">
     <Grid>
      <Grid.RowDefinitions>
       <RowDefinition Height="Auto"/>
       <RowDefinition Height="*"/>
      </Grid.RowDefinitions>
      <TextBlock>This is a header of some sort</TextBlock>
      <Border Grid.Row="1" Height="2000" Margin="3" BorderBrush="DimGray" Background="AliceBlue"/>
     </Grid>
    </ScrollViewer>
   </Border>
  </Popup>
 </Grid>
</Window>

推荐答案

它似乎稍微复杂一些-在我的应用程序中，弹出窗口没有即使我确实没有设置滚动条，即使我没有设置VerticalScrollBarVisibility = Auto也无法正确显示.我无法对此做一个简单的复制案例，但我猜 它与同一个核心问题有关.

It's apparently slightly more complicated - in my app the popup doesn't display properly even if I don't set VerticalScrollBarVisibility=Auto if the scroll bars are actually needed. I haven't been able to make a simple repro case of this but I'm guessing it's related to the same core issue.

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