Question

我正在尝试使用具有编辑状态的项目构建ListBox。我为Normal和Edit模式创建了一个单独的DataTemplate，但是一旦我在ContentPresenter上更改ContentTemplate，我就会丢失带有DataTempaltes的按钮的事件冒泡（意味着按钮点击不再有动作）。

以下是代码：

<UserControl.Resources>

    <DataTemplate x:Key="NormalDT">
        <StackPanel>
            <TextBlock Text="{Binding Property1}"/>
            <CheckBox IsChecked="{Binding Property2, Mode=TwoWay}"/>
            <Button Content="Test" Click="Button_Click" />
        </StackPanel>
    </DataTemplate>
    <DataTemplate x:Key="EditDT">
        <StackPanel>
            <TextBox Text="{Binding Property1}"/>
            <CheckBox IsChecked="{Binding Property2, Mode=TwoWay}"/>
            <Button Content="Test" Click="Button_Click" />
        </StackPanel>
    </DataTemplate>
    <Style x:Key="ListBoxItemStyle1" TargetType="ListBoxItem">
        <Setter Property="Padding" Value="3"/>
        <Setter Property="HorizontalContentAlignment" Value="Left"/>
        <Setter Property="VerticalContentAlignment" Value="Top"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="TabNavigation" Value="Local"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ListBoxItem">
                    <Grid Background="{TemplateBinding Background}">
                        <VisualStateManager.VisualStateGroups>
                            <VisualStateGroup x:Name="CommonStates">
                                <VisualState x:Name="Normal"/>
                                <VisualState x:Name="MouseOver">
                                    <Storyboard>
                                        <DoubleAnimation Duration="0" To=".35" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="fillColor"/>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Disabled">
                                    <Storyboard>
                                        <DoubleAnimation Duration="0" To=".55" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="contentPresenter"/>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="SelectionStates">
                                <VisualState x:Name="Unselected"/>
                                <VisualState x:Name="Selected">
                                    <Storyboard>
                                        <DoubleAnimation Duration="0" To=".75" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="fillColor2"/>
                                    </Storyboard>
                                </VisualState>
                            </VisualStateGroup>
                            <VisualStateGroup x:Name="FocusStates">
                                <VisualState x:Name="Focused">
                                    <Storyboard>
                                        <ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="Visibility" Storyboard.TargetName="FocusVisualElement">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentPresenterEdit">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Visible</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentPresenter">
                                            <DiscreteObjectKeyFrame KeyTime="0">
                                                <DiscreteObjectKeyFrame.Value>
                                                    <Visibility>Collapsed</Visibility>
                                                </DiscreteObjectKeyFrame.Value>
                                            </DiscreteObjectKeyFrame>
                                        </ObjectAnimationUsingKeyFrames>
                                    </Storyboard>
                                </VisualState>
                                <VisualState x:Name="Unfocused"/>
                            </VisualStateGroup>
                        </VisualStateManager.VisualStateGroups>
                        <Rectangle x:Name="fillColor" Fill="#FFBADDE9" IsHitTestVisible="False" Opacity="0" RadiusY="1" RadiusX="1"/>
                        <Rectangle x:Name="fillColor2" Fill="#FFBADDE9" IsHitTestVisible="False" Opacity="0" RadiusY="1" RadiusX="1"/>
                        <ContentPresenter x:Name="contentPresenter" 
                                          ContentTemplate="{StaticResource NormalDT}" 
                                          Content="{TemplateBinding Content}" 
                                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                          Margin="{TemplateBinding Padding}"/>

                        <ContentPresenter x:Name="contentPresenterEdit" 
                                          ContentTemplate="{StaticResource EditDT}" 
                                          Content="{TemplateBinding Content}" 
                                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                          Margin="{TemplateBinding Padding}" Visibility="Collapsed"/>
                        <Rectangle x:Name="FocusVisualElement" RadiusY="1" RadiusX="1" Stroke="#FF6DBDD1" StrokeThickness="1" Visibility="Collapsed"/>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="White" DataContext="{Binding Source={StaticResource SampleDataSource}}">
    <ListBox Height="263" Margin="33,54,366,0" VerticalAlignment="Top" ItemTemplate="{StaticResource NormalDT}" ItemsSource="{Binding Collection}" ItemContainerStyle="{StaticResource ListBoxItemStyle1}"/>

</Grid>

关于如何让button_click事件在我的情况下工作的任何想法？

非常感谢任何帮助！

感谢。

Answer 1

由于某些我不知道的原因，焦点视觉状态中定义的Visibility动画导致此问题。

尝试设置Opacity动画，它应该有效。

<强>更新

实际上，您的代码在WPF中有效。我认为这是Silverlight中的一个错误。如果您将MouseLeftButtonDown事件附加到TextBlock，它实际上会触发，但Buttons和CheckBoxes的情况并非相同。

然后我怀疑它可能是这个，但我不是百分百肯定......

在Silverlight 5之前，ButtonBase不会改变视觉状态当“可见性”设置为“折叠”时，控件可见时再次，它在看不见之前一直处于视觉状态。

Silverlight ListBoxItem DataTemplate Button问题！？

1 个答案: