我正在尝试向自定义的ListView(MyListView)添加一个按钮,该按钮触发在MyListView中定义的命令(MyCustomCommand)。我通过应用ControlTemplate添加了按钮(以及标题文本)。问题在于我还没有找到一种方法来在单击按钮时触发MyCustomCommand。最终我想要实现的是打开一个Popup或ContextMenu,在其中可以选择ListView中应该可见的列。
以下是我的模板源代码:
这里是MyListView的定义:
以下是我的模板源代码:
<Style TargetType="local:MyListView">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:MyListView">
<Border Name="Border" BorderThickness="1" BorderBrush="Black">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="30" />
<RowDefinition />
</Grid.RowDefinitions>
<Grid Background="LightSteelBlue">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBlock Margin="3,3,3,3" Text="{TemplateBinding HeaderTitle}" Grid.Column="0" VerticalAlignment="Center" HorizontalAlignment="Stretch" FontSize="16" />
<Button Margin="3,3,3,3" Grid.Column="1"
VerticalAlignment="Center" HorizontalAlignment="Right" Height="20"
Command="{TemplateBinding MyCustomCommand}">A button</Button>
</Grid>
<ScrollViewer Grid.Row="1" Style="{DynamicResource {x:Static GridView.GridViewScrollViewerStyleKey}}">
<ItemsPresenter />
</ScrollViewer>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
这里是MyListView的定义:
public class MyListView : ListView
{
public static readonly DependencyProperty MyCustomCommandProperty =
DependencyProperty.Register("MyCustomCommand", typeof(ICommand), typeof(MyListView));
private static RoutedCommand myCustomCommand;
public ICommand MyCustomCommand
{
get
{
if (myCustomCommand == null)
{
myCustomCommand = new RoutedCommand("MyCustomCommand", typeof(MyListView));
var binding = new CommandBinding();
binding.Command = myCustomCommand;
binding.Executed += binding_Executed;
CommandManager.RegisterClassCommandBinding(typeof(MyListView), binding);
}
return myCustomCommand;
}
}
private static void binding_Executed(object sender, ExecutedRoutedEventArgs e)
{
MessageBox.Show("Command Handled!");
}
public static readonly DependencyProperty HeaderTitleProperty =
DependencyProperty.Register("HeaderTitle", typeof(string), typeof(MyListView));
public string HeaderTitle { get; set; }
}
以下是创建MyListView简单实例的XAML代码:
<local:MyListView VerticalAlignment="Top" HeaderTitle="ListView title">
<ListView.View>
<GridView>
<GridViewColumn Width="70" Header="Column 1" />
<GridViewColumn Width="70" Header="Column 2" />
<GridViewColumn Width="70" Header="Column 3" />
</GridView>
</ListView.View>
<ListViewItem>1</ListViewItem>
<ListViewItem>2</ListViewItem>
<ListViewItem>1</ListViewItem>
<ListViewItem>2</ListViewItem>
</local:MyListView>
注意HeaderTitle是绑定到MyListView中的DependencyProperty的。这个可以正常工作。为什么命令不以同样的方式工作呢?有什么方法可以让它工作吗?