INotifyPropertyChanging
INotifyPropertyChanged is an interface in the .NET framework, specifically part of the System.ComponentModel namespace. It is used to notify clients, typically binding clients, that a property value has changed. This interface is fundamental in data binding scenarios, where changes in the data source need to be reflected in the user interface in real-time.
The INotifyPropertyChanged interface defines a single event, PropertyChanged, which is raised when a property value changes.
To implement INotifyPropertyChanged, a class must declare the event and raise it in the property setter. Here
public class Person : INotifyPropertyChanged
{
{
{
{
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
In this example, the Name property raises the PropertyChanged event whenever its value is changed. The
INotifyPropertyChanged is widely used in WPF (Windows Presentation Foundation) applications for data binding. It allows the