public DelegateCommandImpl(Action <TParameter> execute, Func <TParameter, bool> canExecute, INotifyPropertyChanged target, string[] propertyNames)
{
_execute = execute;
_canExecute = canExecute;
_propertyNames = propertyNames;
if (target != null)
{
_propertyChangedRegistration = target.RegisterPropertyChangedWeak(this, (t, s, e) => t.OnPropertyChanged(e));
}
}
/// <summary>
/// Initializes a new instance of <see cref="DelegateCommand"/>.
/// </summary>
/// <param name="execute">The execute function.</param>
/// <param name="canExecute">The canExecute function.</param>
/// <param name="target">The object to observe for change notifications.</param>
/// <param name="propertyNames">The property names.</param>
public DelegateCommand(Action execute, Func <bool> canExecute, INotifyPropertyChanged target, params string[] propertyNames)
{
if (execute == null)
{
throw new ArgumentNullException(nameof(execute));
}
if (canExecute == null)
{
throw new ArgumentNullException(nameof(canExecute));
}
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (propertyNames == null || propertyNames.Length == 0)
{
throw new ArgumentNullException(nameof(propertyNames));
}
_execute = execute;
_canExecute = canExecute;
_propertyNames = propertyNames;
_propertyChangedRegistration = target.RegisterPropertyChangedWeak(this, (t, s, e) => t.OnPropertyChanged(e));
}
