C# INotifyPropertyChanged – テックメモ

前回のイベント、デリゲートと似た内容。

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            var p = new Person();

            p.PropertyChanged += (s,e) => {
                MessageBox.Show(e.PropertyName);
            };

            //プロパティが変更されるとイベントが発火。
            p.Name = "jiro";
        }
    }

    class Person : INotifyPropertyChanged
    {
        private string _name;
        public string Name
        {
            get { return _name; }
            set
            {
                if (Equals(_name, value)) return;
                _name = value;
                OnPropertyChanged(_name);
                
            }
        }
        
        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string name)
        {
            if (PropertyChanged == null) return;
            PropertyChanged(this, new PropertyChangedEventArgs(name));
        }

    }

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

var p = new Person();

p.PropertyChanged += (s,e) => {

MessageBox.Show(e.PropertyName);

};

//プロパティが変更されるとイベントが発火。

p.Name = "jiro";

}

class Person : INotifyPropertyChanged

{

private string _name;

public string Name

{

get { return _name; }

set

{

if (Equals(_name, value)) return;

_name = value;

OnPropertyChanged(_name);

}

public event PropertyChangedEventHandler PropertyChanged;

protected virtual void OnPropertyChanged(string name)

{

if (PropertyChanged == null) return;

PropertyChanged(this, new PropertyChangedEventArgs(name));

}