我看到了这个question并且我遇到了同样的问题,但我在视图模型中有命令。我可以像MouseEventargs
那样通过CommandParameter
吗?
acb:CommandBehavior.Event="MouseDoubleClick" acb:CommandBehavior.Command="{Binding Command}"
acb:CommandBehavior.CommandParameter="{???}"
答案 0 :(得分:1)
您需要使用Blend,并使用交互触发器执行此类操作。在触发Execute委托时的命令参数中,将出现Mouse EventArgs ..
<Button>
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseDoubleClick" >
<cmd:EventToCommand Command="{Binding MouseDoubleClickCommand}"
PassEventArgsToCommand="True" />
</i:EventTrigger>
</i:Interaction.Triggers>
如果你不能使用交互性dll试试这个..
public static class MouseDoubleClickBehavior
{
/// <summary>
/// Hooks up a weak event against the source Selectors MouseDoubleClick
/// if the Selector has asked for the HandleDoubleClick to be handled
///�
/// If the source Selector has expressed an interest in not having its
/// MouseDoubleClick handled the internal reference
/// </summary>
private static void OnHandleDoubleClickCommandChanged(DependencyObject d,
DependencyPropertyChangedEventArgs e)
{
FrameworkElement ele = d as FrameworkElement;
if (ele != null)
{
ele.MouseLeftButtonDown -= OnMouseDoubleClick;
if (e.NewValue != null)
{
ele.MouseLeftButtonDown += OnMouseDoubleClick;
}
}
}
/// <summary>
/// TheCommandToRun : The actual ICommand to run
/// </summary>
public static readonly DependencyProperty DoubleClickCommandProperty =
DependencyProperty.RegisterAttached("DoubleClickCommand",
typeof(ICommand),
typeof(MouseDoubleClickBehavior),
new FrameworkPropertyMetadata((ICommand)null,
new PropertyChangedCallback(OnHandleDoubleClickCommandChanged)));
/// <summary>
/// Gets the TheCommandToRun property. �
/// </summary>
public static ICommand GetDoubleClickCommand(DependencyObject d)
{
return (ICommand)d.GetValue(DoubleClickCommandProperty);
}
/// <summary>
/// Sets the TheCommandToRun property. �
/// </summary>
public static void SetDoubleClickCommand(DependencyObject d, ICommand value)
{
d.SetValue(DoubleClickCommandProperty, value);
}
#region Handle the event
/// <summary>
/// Invoke the command we tagged.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void OnMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
//check for double clicks.
if (e.ClickCount != 2)
return;
FrameworkElement ele = sender as FrameworkElement;
DependencyObject originalSender = e.OriginalSource as DependencyObject;
if (ele == null || originalSender == null)
return;
ICommand command = (ICommand)(sender as DependencyObject).GetValue(DoubleClickCommandProperty);
if (command != null)
{
if (command.CanExecute(null))
command.Execute(null);
}
}
#endregion
}
并使用此绑定 - MouseDoubleClickBehavior.DoubleClickCommand =“{Binding SomeCommand}”