Question

我的应用程序中有一个扩展视图，当用户从扩展器视图中选择一个项目时，我正试图触发一个事件，但是我不能在我的生活中让它工作。

我的xaml看起来像这样：

<!--Custom header template-->
<DataTemplate x:Key="CustomHeaderTemplate">
    <TextBlock Text="" FontSize="28" />            
</DataTemplate>

<!--Custom expander template-->
<DataTemplate x:Key="CustomExpanderTemplate">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <Rectangle Width="400" Height="60" Fill="#FFF1F1F1" HorizontalAlignment="Stretch" StrokeThickness="0" Grid.Row="0" Grid.Column="0" />
        <TextBlock Text="{Binding procedureName}" FontSize="30" Foreground="#FF00457C" FontWeight="Normal" Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" Margin="10,0,0,0" />

    </Grid>

</DataTemplate>

<!--Custom expander items template-->
<DataTemplate x:Key="ExpanderViewItems" >

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="15" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <Image Source="{Binding flagIcon}" Grid.Row="0" Grid.RowSpan="3" Grid.Column="0" />
        <TextBlock FontSize="26" Text="{Binding N}" Foreground="Black" FontWeight="Normal" Grid.Row="0" Grid.Column="1"/>
        <TextBlock FontSize="20" Text="{Binding RNG}" Foreground="Black" FontWeight="Normal" HorizontalAlignment="Right" Grid.Row="0" Grid.Column="2"/>                
        <TextBlock FontSize="26" Text="{Binding ValueAndUnit}" Foreground="Black" FontWeight="Medium" HorizontalAlignment="Right" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
        <TextBlock FontSize="18" Text="{Binding COM}" Foreground="Black" FontWeight="Normal" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2" TextWrapping="Wrap" />
        <Line StrokeThickness="1" Stroke="#C4C6CC" Stretch="Fill" X1="0" X2="1" Y1="0" Y2="0" VerticalAlignment="Center" Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="3" />
    </Grid>
</DataTemplate>

<!--Listbox Containing ExpanderViews-->
        <ListBox Name="testsList" Grid.Row="3" Grid.Column="0" >
            <ListBox.ItemTemplate>
                <DataTemplate>

                    <!--ExpanderView-->
                    <toolkit:ExpanderView Header="{Binding}"                                                   
                                          HeaderTemplate="{StaticResource CustomHeaderTemplate}"
                                          Expander="{Binding}"
                                          ExpanderTemplate="{StaticResource CustomExpanderTemplate}"
                                          x:Name="expander" 
                                          FontSize="36" 
                                          Foreground="#FF00457C" 
                                          ItemsSource="{Binding testItems}"
                                          ItemTemplate="{StaticResource ExpanderViewItems}" >                          
                    </toolkit:ExpanderView>

                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

所以你有它，只需要在用户选择一个扩展项时简单地触发一个事件，发现它非常繁琐。

感谢您的任何建议！

Answer 1

您应该在ItemTemplate的Item容器上使用MouseLeftButtonUp事件处理程序，它是一个Grid控件：

<!--Custom expander items template-->
<DataTemplate x:Key="ExpanderViewItems" >

    <Grid MouseLeftButtonUp="ItemSelected">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="15" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <Image Source="{Binding flagIcon}" Grid.Row="0" Grid.RowSpan="3" Grid.Column="0" />
        <TextBlock FontSize="26" Text="{Binding N}" Foreground="Black" FontWeight="Normal" Grid.Row="0" Grid.Column="1"/>
        <TextBlock FontSize="20" Text="{Binding RNG}" Foreground="Black" FontWeight="Normal" HorizontalAlignment="Right" Grid.Row="0" Grid.Column="2"/>                
        <TextBlock FontSize="26" Text="{Binding ValueAndUnit}" Foreground="Black" FontWeight="Medium" HorizontalAlignment="Right" Grid.Row="1" Grid.Column="1" Grid.ColumnSpan="2"/>
        <TextBlock FontSize="18" Text="{Binding COM}" Foreground="Black" FontWeight="Normal" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="2" TextWrapping="Wrap" />
        <Line StrokeThickness="1" Stroke="#C4C6CC" Stretch="Fill" X1="0" X2="1" Y1="0" Y2="0" VerticalAlignment="Center" Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="3" />
    </Grid>
</DataTemplate>

在expandderView项目选择上的Fire事件

1 个答案: