public static async Task TryExecuteAsync(this IViewModelCommand command, object arg)
{
if (command != null && command.CanExecute(arg))
{
await command.ExecuteAsync(arg);
}
}
public static async Task TryExecuteAsync(this IViewModelCommand command)
{
if (command != null && command.CanExecute())
{
await command.ExecuteAsync();
}
}
public static void TryExecute(this IViewModelCommand command)
{
if (command != null && command.CanExecute())
{
command.Execute();
}
}
public static void TryExecute(this IViewModelCommand command, object arg)
{
if (command != null && command.CanExecute(arg))
{
command.Execute(arg);
}
}
public static bool RedirectCanExecute <TViewModel, TEventArgs>(
this IViewModelCommand <TViewModel, TEventArgs> @this,
object viewModel,
object eventArgs)
{
Contract.Requires(@this != null);
Contract.Requires(viewModel != null);
Contract.Requires(eventArgs != null);
var(tViewModel, tEventArgs) = castHelper <TViewModel, TEventArgs>(viewModel, eventArgs, @this.getCommandName());
return(@this.CanExecute(tViewModel, tEventArgs));
}
