问MVVM - PropertyChangedEventHandler

EN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Input;

namespace drMVVM.Model
{
    public class TextContent : INotifyPropertyChanged
    {
        private string text;
        public string Text
        {
            get { return text; }
            set
            {
                if (text != value)
                {
                    text = value;
                    OnPropertyChanged("Text");
                }
            }
        }

        private void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }
}