WPF DependencyProperties vs INotifyPropertyChanged

Published on Friday, September 23, 2011

There are 2 ways to get the automatic notice target object if the source object changed (for example: the value) when you using WPF data binding: the one is Dependency Properties, the other one is INotifyPropertyChanged:

INotifyPropertyChanged sample:

public class IODataPresentation : INotifyPropertyChanged     
{      
    public event PropertyChangedEventHandler PropertyChanged;_
  
    private string _ValueString;_
  
    public string ValueString     
    {      
        get { return _ValueString; }      
        set      
        {      
            _ValueString = value;_
  
           if (PropertyChanged != null)     
           {      
                PropertyChanged(this, new PropertyChangedEventArgs("ValueString"));      
            }
        }     
    }      
    public IODataPresentation() { }      
} 

DependencyProperties sample:

// Dependency Property     
public static readonly DependencyProperty NewValueStringProperty =      
    DependencyProperty.Register("ValueString", typeof(string),      
    typeof(UDirectIOBlock), new FrameworkPropertyMetadata(""));_
  
   
_public string NewValueString     
{      
    get { return (string)GetValue(NewValueStringProperty); }      
    set { SetValue(NewValueStringProperty, value); }      
}

About their differences, please read 2 great articles here and here.