PropertyChangedEventHandler Delegato

Definizione

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.Guid(1358011414, 2594, 19854, 160, 137, 30, 169, 149, 22, 87, 210)]
class PropertyChangedEventHandler : MulticastDelegate

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.Guid(1358011414, 2594, 19854, 160, 137, 30, 169, 149, 22, 87, 210)]
public delegate void PropertyChangedEventHandler(object sender, PropertyChangedEventArgs e);

Public Delegate Sub PropertyChangedEventHandler(sender As Object, e As PropertyChangedEventArgs)

Parametri

Attributi

ContractVersionAttribute GuidAttribute

Requisiti Windows

Esempio

In questo esempio viene illustrato come implementare l'interfaccia INotifyPropertyChanged e usare PropertyChangedEventHandler. Per l'elenco di codice completo, vedere l'esempio di data binding XAML.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DataBinding
{
    public class Employee : INotifyPropertyChanged 
    {
        private string _name;
        private string _organization;

        public string Name
        {
            get { return _name; }
            set
            {
                _name = value;
                RaisePropertyChanged("Name");
            }
        }

        public string Organization
        {
            get { return _organization; }
            set
            {
                _organization = value;
                RaisePropertyChanged("Organization");
            }
        }


        public event PropertyChangedEventHandler PropertyChanged;
        protected void RaisePropertyChanged(string name)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(name));
            }
        }
    }
}

Commenti

Quando si esegue la programmazione con Microsoft .NET, questo delegato è nascosto. Microsoft .NET Developers deve usare il delegato System.ComponentModel.PropertyChangedEventHandler .

Si applica a

Vedi anche

• Binding
• Esempio di data binding XAML
• Informazioni approfondite sul data binding