简单实现INotifyPropertyChanged接口-优快云博客

本文介绍了一个简单的.NET框架中INotifyPropertyChanged接口的实现方法。通过使用泛型表达式和反射技术，可以方便地通知UI层属性的变化，适用于WPF、UWP等依赖属性变化的应用场景。

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下面简单实现INotifyPropertyChanged接口

using System;
using System.ComponentModel;
using System.Linq.Expressions;
using System.Reflection;

namespace LearnBinding.Model
{
    public class ObservableObject : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        public ObservableObject()
        {
        }
        protected PropertyChangedEventHandler PropertyChangedHandler { get; }
        protected virtual void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpression)
        {
            if (PropertyChanged != null)
            {
                string propertyName = GetPropertyName<T>(propertyExpression);
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
            }
        }
        protected string GetPropertyName<T>(Expression<Func<T>> propertyExpression)
        {
            if (propertyExpression == null)
            {
                throw new ArgumentNullException("propertyExpression");
            }
            MemberExpression memberExpression = propertyExpression.Body as MemberExpression;
            if (memberExpression == null)
            {
                throw new ArgumentException("Invalid argument", "propertyExpression");
            }
            PropertyInfo propertyInfo = memberExpression.Member as PropertyInfo;
            if (propertyInfo == null)
            {
                throw new ArgumentException("Argument is not a property", "propertyExpression");
            }
            return propertyInfo.Name;
        }
    }
}

转载于:https://my.oschina.net/u/2332532/blog/1794758