如何在 XAML 中将弹出窗口置于我的 window 中心？

Question

我想在我的 window 上设置一个居中的弹出通知（Height="400" Width="500"）。请参阅下面的 xaml 代码。是否可以仅使用 xaml（没有后面的代码）将其居中？

    </Grid>
    <TextBlock Text="TEXT" Grid.Row="1" Grid.Column="0" Grid.RowSpan="2" Grid.ColumnSpan="3" FontSize="200" FontWeight="Bold" HorizontalAlignment="Center"/>
    <Grid Grid.Row="1" Grid.Column="1">

        <Popup x:Name="PopupName" Grid.ColumnSpan="2" IsOpen="{Binding ElementName=ToggleButton,Path=IsChecked}" StaysOpen="False" Placement="Absolute" 
            AllowsTransparency="True"  PopupAnimation="None"   Focusable="False" HorizontalAlignment="Center" VerticalAlignment="Center">
            <Grid Height="400" Width="500">
                <Rectangle Fill="Silver" Opacity="0.5" Panel.ZIndex="1" Height="400" Width="500"/>

                <StackPanel VerticalAlignment="Center" HorizontalAlignment="Center" Panel.ZIndex="2" Height="150" Width="150">
                    <ListBox Height="Auto" HorizontalAlignment="Center" >
                        <Label Content="Red" Background="Red" Margin="5" VerticalAlignment="Top"/>
                        <Label Content="Green" Background="Green" Margin="5" VerticalAlignment="Center"/>
                        <Label Content="Yellow" Background="Yellow" Margin="5" VerticalAlignment="Bottom"/>
                    </ListBox>
                </StackPanel>

                <ToggleButton Panel.ZIndex="2" Background="Coral" Foreground="White" FontWeight="Bold" Name ="Button"  Width="80" Height="30" HorizontalAlignment="Center"  Margin="5,170,5,5" Content="Close" Click="Button_OnClick"/>
            </Grid>
        </Popup>
    </Grid>

另一种选择是将 Placement ="AbsolutePoint" 与 Horizon-/Verticaloffset 一起使用，但它看起来有点奇怪 :D

有什么建议吗？谢谢 ;)

Answer 1

这应该使 Popup 在父 window 中居中：

<Popup ...
    Placement="Center" 
    PlacementTarget="{Binding RelativeSource={RelativeSource AncestorType=Window}}" />

如何在 XAML 中将弹出窗口置于我的 window 中心？

How can i centred a popup on my window in XAML?

c#

wpf

xaml

popup