/// <summary>
/// 执行Command
/// </summary>
/// <param name="parameter">参数条件</param>
public virtual void Execute(object parameter)
{
if (CanExecute(parameter))
{
OnCommandExecute(EventCommandEventArgs.Create(parameter, ViewModel));
}
}
/// <summary>
/// Executes from event.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="eventArgs">The event arguments.</param>
/// <param name="eventName">Name of the event.</param>
/// <param name="eventHandlerType">Type of the event handler.</param>
public void ExecuteFromEvent(object sender, object eventArgs, string eventName, Type eventHandlerType)
{
object vm = null;
var s = (sender as FrameworkElement);
if (Command == null)
{
return;
}
var cvm = Command as ICommandWithViewModel;
if (cvm != null)
{
vm = cvm.ViewModel;
}
var newe = EventCommandEventArgs.Create(Parameter, vm, sender, eventArgs, eventName, eventHandlerType);
if (Command.CanExecute(newe))
{
var spEventCommand = Command as EventCommandBase;
if (spEventCommand == null)
{
Command.Execute(newe);
}
else
{
spEventCommand.OnCommandExecute(newe);
}
}
}
/// <summary>
/// Executes the specified parameter.
/// </summary>
/// <param name="parameter">The parameter.</param>
public void Execute(object parameter)
{
if (CanExecute(parameter))
{
var evp = EventCommandEventArgs.Create(parameter, ViewModel, null);
_executeSource.OnNext(new EventPattern <EventCommandEventArgs>(this, evp));
}
}
/// <summary>
/// Executes asynchronously.
/// </summary>
/// <param name="parameter">The parameter.</param>
/// <returns></returns>
public async Task ExecuteAsync(object parameter)
{
if (CanExecute(parameter))
{
var evp = EventCommandEventArgs.Create(parameter, ViewModel);
_executeSource.OnNext(new EventPattern <EventCommandEventArgs>(this, evp));
await evp.Completion.Task;
}
}
void WireEventToItem(IApplicationBarMenuItem item)
{
//if (commandSubscription != null)
//{
// commandSubscription.Dispose();
// commandSubscription = null;
//}
//commandSubscription =
Observable.FromEventPattern(
eh => item.Click += eh,
eh => item.Click -= eh)
.Subscribe(
ev =>
{
var agg = EventCommandEventArgs.Create(AssociatedObject.CommandParameter, null, ev.Sender, ev.EventArgs, "Click", typeof(EventHandler));
EventRouting.EventRouter.Instance
.RaiseEvent(item, agg, EventFilterName);
}
);
}