您可能希望在此处使用 DoubleClick 已有的附加行为。
否则,这里是我使用的完整代码,它创建附加行为,并将创建两个绑定到命令和可选命令参数的附加属性。
AttachedBehaviors.cs
public static class MouseDoubleClick
{
public static DependencyProperty CommandProperty =
DependencyProperty.RegisterAttached("Command",
typeof(ICommand),
typeof(MouseDoubleClick),
new UIPropertyMetadata(CommandChanged));
public static DependencyProperty CommandParameterProperty =
DependencyProperty.RegisterAttached("CommandParameter",
typeof(object),
typeof(MouseDoubleClick),
new UIPropertyMetadata(null));
public static void SetCommand(DependencyObject target, ICommand value)
{
target.SetValue(CommandProperty, value);
}
public static void SetCommandParameter(DependencyObject target, object value)
{
target.SetValue(CommandParameterProperty, value);
}
public static object GetCommandParameter(DependencyObject target)
{
return target.GetValue(CommandParameterProperty);
}
private static void CommandChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
{
Control control = target as Control;
if (control != null)
{
if ((e.NewValue != null) && (e.OldValue == null))
{
control.MouseDoubleClick += OnMouseDoubleClick;
}
else if ((e.NewValue == null) && (e.OldValue != null))
{
control.MouseDoubleClick -= OnMouseDoubleClick;
}
}
}
private static void OnMouseDoubleClick(object sender, RoutedEventArgs e)
{
Control control = sender as Control;
ICommand command = (ICommand)control.GetValue(CommandProperty);
object commandParameter = control.GetValue(CommandParameterProperty);
if (command.CanExecute(commandParameter))
command.Execute(commandParameter);
}
}
.xaml- 请记住添加附加行为所在的命名空间。
<telerik:RadTreeView IsExpandOnSingleClickEnabled="True"
IsLineEnabled="True"
Margin="5"
ItemsSource="{Binding ItemsView}"
SelectedItem="{Binding SelectedWidget, Mode=TwoWay}"
ItemTemplate="{StaticResource NodeTemplate}"
acb:MouseDoubleClick.Command="{Binding ShowItemCommand}" />
示例ViewModel.cs
private RelayCommand _showItemCommand;
public RelayCommand ShowItemCommand
{
get
{
return _showItemCommand ?? (_showItemCommand =
new RelayCommand(ShowItemDetails, IsItemSelected));
}
}