INotifyPropertyChanged Interface
Notifies clients that a property value has changed.
Namespace: System.ComponentModel
Assembly: System (in System.dll)
The INotifyPropertyChanged type exposes the following members.
The INotifyPropertyChanged interface is used to notify clients, typically binding clients, that a property value has changed.
For example, consider a Person object with a property called FirstName. To provide generic property-change notification, the Person type implements the INotifyPropertyChanged interface and raises a PropertyChanged event when FirstName is changed.
The following code example demonstrates the how to implement the INotifyPropertyChanged interface.
//Add using statements using System.ComponentModel; using System.Windows.Data; ... // Create a class that implements INotifyPropertyChanged public class Person : INotifyPropertyChanged { private string firstNameValue; public string FirstName{ get { return firstNameValue; } set { firstNameValue=value; // Call NotifyPropertyChanged when the property is updated NotifyPropertyChanged("FirstName"); } } // Declare the PropertyChanged event public event PropertyChangedEventHandler PropertyChanged; // NotifyPropertyChanged will raise the PropertyChanged event passing the // source property that is being updated. public void NotifyPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } }
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.


