WPF - INotifyPropertyChanged
INotifyPropertyChanged Interface
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.
For change notification to occur in a binding between a bound client and a data source, your bound type should either:
- implement the INotifyPropertyChanged interface (preferred).
- provide a change event for each property of the bound type.
DO NOT DO BOTH
Example
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName))
}
}
The PropertyChangedEventArgs will raise an event when property value changed.