private void UpdateCanExecute()
{
if (this.Command != null)
{
this.CanExecute = CommandHelpers.CanExecuteCommandSource(this);
}
else
{
this.CanExecute = true;
}
}
private void UnhookCommand(ICommand command)
{
#if NET4
var handler = CommandHelpers.GetCanExecuteChangedHandler(this);
if (handler != null)
{
command.CanExecuteChanged -= handler;
CommandHelpers.SetCanExecuteChangedHandler(this, null);
}
#else
CanExecuteChangedEventManager.RemoveHandler(command, new EventHandler <EventArgs>(this.OnCanExecuteChanged));
#endif
this.UpdateCanExecute();
}
/// <summary>
/// Executes the command which can be set by the user.
/// </summary>
public void RaiseCommand()
{
CommandHelpers.ExecuteCommandSource((ICommandSource)this);
}