/// <summary>
/// Raises the <see cref="BeforePropertyChanged"/> event.
/// </summary>
/// <param name="propertyName">The property name.</param>
/// <param name="newValue">The new value.</param>
/// <returns><c>true</c> indicates that the property change is to be cancelled; otherwise, <c>false</c>.</returns>
protected virtual bool OnBeforePropertyChanged(string propertyName, object newValue)
{
Check.NotNull(propertyName, nameof(propertyName));
if (BeforePropertyChanged != null)
{
var e = new BeforePropertyChangedEventArgs(propertyName, newValue);
BeforePropertyChanged(this, e);
if (e.Cancel)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Raises the <see cref="BeforePropertyChanged"/> event.
/// </summary>
/// <param name="propertyName">The property name.</param>
/// <param name="newValue">The new value.</param>
/// <returns><c>true</c> indicates that the property change is to be cancelled; otherwise, <c>false</c>.</returns>
protected virtual bool OnBeforePropertyChanged(string propertyName, object newValue)
{
if (propertyName == null)
{
throw new ArgumentNullException("propertyName");
}
if (BeforePropertyChanged != null)
{
var e = new BeforePropertyChangedEventArgs(propertyName, newValue);
BeforePropertyChanged(this, e);
if (e.Cancel)
{
return(true);
}
}
return(false);
}