弹出窗口不滚动时关闭

问题描述：

我有一个文本框，当它有焦点时弹出窗口出现在它下面。但是当弹出窗口打开并且我滚动时，它似乎停留在它打开的同一个位置。我需要帮助确定如何在滚动时在文本框下方显示弹出窗口。我将如何在xaml中做到这一点？弹出窗口不滚动时关闭

谢谢！

主窗口视图：

<Grid x:Name="LayoutRoot"> 
    <ScrollViewer> 
     <local:ControlView/> 

    </ScrollViewer> 
</Grid>

资源词典：

<Style TargetType="{x:Type Popup}"> 
    <Style.Triggers> 
     <DataTrigger Binding="{Binding ElementName=txtTest, Path=IsKeyboardFocused}" Value="True"> 
      <Setter Property="IsOpen" Value="True" /> 
     </DataTrigger> 
     <DataTrigger Binding="{Binding ElementName=txtTest, Path=IsKeyboardFocused }" Value="False"> 
      <Setter Property="IsOpen" Value="False" /> 
     </DataTrigger> 
    </Style.Triggers> 
</Style> 
<Style x:Key="BorderStyle" TargetType="{x:Type Border}"> 
    <Setter Property="Background" Value="LemonChiffon"/> 
    <Setter Property="Padding" Value="5"/> 
</Style>

用户控件查看：

<Grid x:Name="LayoutRoot"> 
     <StackPanel Grid.Row="1" Grid.Column="4" Orientation="Vertical"> 
         <Button Content="Button" Width="100" Height="100"/> 
         <Button Content="Button" Width="100" Height="100"/> 
         <TextBox x:Name="txtTest" HorizontalAlignment="Stretch"/> 

         <Popup Name="TestPopup" StaysOpen="True" 
          PlacementTarget="{Binding ElementName=txtTest}" 
          AllowsTransparency="True" Placement="{Binding ElementName=txtTest}"> 
          <Border Style="{DynamicResource BorderStyle}"> 
           <GroupBox Header="Test Popup"> 
            <ScrollViewer Margin="0,2,0,0" VerticalScrollBarVisibility="Hidden"> 
            <!--BINDING--> 
            <Label Content="Hello World!"/>        
            </ScrollViewer> 
           </GroupBox> 
          </Border> 
         </Popup> 
         <ContentPresenter Content="{Binding testBinding}" 
              VerticalAlignment="Stretch" HorizontalAlignment="Stretch"> 
         </ContentPresenter> 
        </StackPanel> 
</Grid>

你能发表一些代码吗？像什么容器是文本框？ – 2012-03-09 19:45:08

您已阅读过http://stackoverflow.com/questions/2309883/wpf-detect-scrolling-parent-control？ – 2012-03-11 02:08:20

您应该在打开时提供弹出式对焦。这种方式你不应该能够滚动，除非弹出关闭。我发现的最好方法是看看组合框控件模板如何在msdn上工作：http://msdn.microsoft.com/en-us/library/ms752094(v=vs.90).aspx – Silvermind 2012-03-11 17:29:12

答

试试这个：

<Style TargetType="{x:Type Popup}"> 
    <Setter 
     Property="IsOpen" 
     Value="{Binding IsKeyboardFocusedWithin, ElementName=txtTest, Mode=OneWay}"/> 
</Style>

弹出窗口不滚动时关闭

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