MARKUS

using System;

using System.ComponentModel;

using System.Linq.Expressions;

namespace Markus.Mvvm.ToolKit

{

    public class NotifyExpectation : INotifyPropertyChanged

    {

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(Expression<Func<object>> propertyExpression)

        {

            PropertyChangedEventHandler handler = PropertyChanged;

            if (handler != null) handler(this, new PropertyChangedEventArgs(GetPropertyName(propertyExpression)));

        }

        private string GetPropertyName(Expression<Func<object>> propertyExpression)

        {

            var unaryExpression = propertyExpression.Body as UnaryExpression;

            var memberExpression = unaryExpression == null ? (MemberExpression)propertyExpression.Body : (MemberExpression)unaryExpression.Operand;

            var propertyName = memberExpression.Member.Name;

            return propertyName;

        }

    }

}