WPF使用成熟的属性自动更新代码

创建一个类名为 ObservableObject的类，其中的代码如下所示：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Runtime.CompilerServices;

namespace Notepad_WPF.Helpers
{
    public class ObservableObject : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected PropertyChangedEventHandler PropertyChangedHandler => PropertyChanged;
         
        public void VerifyPropertyName(string propertyName)
        {
            var myType = GetType();

            if (!string.IsNullOrEmpty(propertyName) && myType.GetProperty(propertyName) == null)
            {
                var descriptor = this as ICustomTypeDescriptor;

                if (descriptor != null)
                {
                    if (descriptor.GetProperties().Cast<PropertyDescriptor>().Any(property => property.Name == propertyName))
                    {
                        return;
                    }
                }

                throw new ArgumentException("Property not found", propertyName);
            }
        }
         
        public virtual void RaisePropertyChanged(string propertyName)
        {
            VerifyPropertyName(propertyName);

            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        public virtual void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpression)
        { 
            if (PropertyChanged != null)
            {
                var propertyName = GetPropertyName(propertyExpression);

                if (!string.IsNullOrEmpty(propertyName))
                {
                    RaisePropertyChanged(propertyName);
                }
            }
        }

        protected static string GetPropertyName<T>(Expression<Func<T>> propertyExpression)
        {
            if (propertyExpression == null)
            {
                throw new ArgumentNullException("propertyExpression");
            }

            var body = propertyExpression.Body as MemberExpression;

            if (body == null)
            {
                throw new ArgumentException("Invalid argument", "propertyExpression");
            }

            var property = body.Member as PropertyInfo;

            if (property == null)
            {
                throw new ArgumentException("Argument is not a property", "propertyExpression");
            }

            return property.Name;
        }

        protected bool Set<T>(Expression<Func<T>> propertyExpression, ref T field, T newValue)
        {
            if (EqualityComparer<T>.Default.Equals(field, newValue))
            {
                return false;
            }
             
            field = newValue;
            RaisePropertyChanged(propertyExpression);
            return true;
        }

        protected bool Set<T>(string propertyName, ref T field, T newValue)
        {
            if (EqualityComparer<T>.Default.Equals(field, newValue)) { return false; }
             
            field = newValue;

            RaisePropertyChanged(propertyName);
            return true;
        }

        protected bool Set<T>(ref T field,T newValue,[CallerMemberName] string propertyName = null)
        {
            return Set(propertyName, ref field, newValue);
        }
    }
} 

可直接复制，使用方式如下所示：