在 WinRT 应用程序中，当您右键单击 ListBoxItem 时，将显示 AppBar。但是，当您右键单击 GridViewItem 时，AppBar 不会出现。这个可以配置吗？
如果不是，最好使用 ListBox 而不是 GridView 并自定义模板。或者我应该使用 RightTapped 命令来实现它。（我使用 MVVM Light，因为 Caliburn.Micro 目前不工作）
RightTappedCommand 示例：
public sealed class RightTapped
{
#region Properties
#region Command
///
/// GetCommand
///
///
///
public static ICommand GetCommand(DependencyObject obj)
{
return (ICommand)obj.GetValue(CommandProperty);
}
///
/// SetCommand
///
///
///
public static void SetCommand(DependencyObject obj, ICommand value)
{
obj.SetValue(CommandProperty, value);
}
///
/// DependencyProperty CommandProperty
///
public static readonly DependencyProperty CommandProperty =
DependencyProperty.RegisterAttached("Command", typeof(ICommand), typeof(RightTapped), new PropertyMetadata(null, OnCommandChanged));
#endregion Command
#region CommandParameter
///
/// GetCommandParameter
///
///
///
public static object GetCommandParameter(DependencyObject obj)
{
return (object)obj.GetValue(CommandParameterProperty);
}
///
/// SetCommandParameter
///
///
///
public static void SetCommandParameter(DependencyObject obj, object value)
{
obj.SetValue(CommandParameterProperty, value);
}
///
/// DependencyProperty CommandParameterProperty
///
public static readonly DependencyProperty CommandParameterProperty =
DependencyProperty.RegisterAttached("CommandParameter", typeof(object), typeof(RightTapped), new PropertyMetadata(null, OnCommandParameterChanged));
#endregion CommandParameter
#region HasCommandParameter
private static bool GetHasCommandParameter(DependencyObject obj)
{
return (bool)obj.GetValue(HasCommandParameterProperty);
}
private static void SetHasCommandParameter(DependencyObject obj, bool value)
{
obj.SetValue(HasCommandParameterProperty, value);
}
private static readonly DependencyProperty HasCommandParameterProperty =
DependencyProperty.RegisterAttached("HasCommandParameter", typeof(bool), typeof(RightTapped), new PropertyMetadata(false));
#endregion HasCommandParameter
#endregion Propreties
#region Event Handling
private static void OnCommandParameterChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
SetHasCommandParameter(o, true);
}
private static void OnCommandChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
var element = o as FrameworkElement;
if (element != null)
{
if (e.NewValue == null)
{
element.RightTapped -= FrameworkElementKeyUp;
}
else if (e.OldValue == null)
{
element.RightTapped += FrameworkElementKeyUp;
}
}
}
private static void FrameworkElementKeyUp(object sender, RightTappedRoutedEventArgs e)
{
var o = sender as DependencyObject;
var command = GetCommand(sender as DependencyObject);
var element = e.OriginalSource as FrameworkElement;
if (element != null)
{
// If the command argument has been explicitly set (even to NULL)
if (GetHasCommandParameter(o))
{
var commandParameter = GetCommandParameter(o);
// Execute the command
if (command.CanExecute(commandParameter))
{
command.Execute(commandParameter);
}
}
else if (command.CanExecute(element.DataContext))
{
command.Execute(element.DataContext);
}
}
}
#endregion
}在 Xaml 中，是这样的：
common:Tapped.Command="{Binding ShowAppBar}"