最简单的方式来实现属性更改的自动通知 [英] Simplest way to achieve automatic notification of property change

问题描述

我知道有解决方案在那里执行INotifyPropertyChanged的，但他们都不是简单的：参考这个库，创建/加入这个属性，做了（我想在这里面向方面编程）。有谁知道一个非常简单的方法来做到这一点？如果该解决方案是免费的奖励积分。

I know that there are solutions out there for implementing INotifyPropertyChanged, but none of them are as simple as: reference this library, create/add this attribute, done (I'm thinking Aspect-Oriented Programming here). Does anyone know of a really simple way to do this? Bonus points if the solution is free.

下面是一些相关的链接（其中没有提供一个再简单不过的答案）：

Here are some relevant links (none of which provide a simple enough answer):

• 方面的实施例（通过方面INotifyPropertyChanged的）
• 李林甫
• <一个href="http://www.$c$cproject.com/Articles/38865/INotifyPropertyChanged-auto-wiring-or-how-to-get-r.aspx"相对=nofollow> INotifyPropertyChanged的自动接线或如何摆脱多余的code
• INotifyPropertyChanged的使用Unity拦截AOP

• Aspect Examples (INotifyPropertyChanged via aspects)
• LinFu
• INotifyPropertyChanged auto wiring or how to get rid of redundant code
• INotifyPropertyChanged With Unity Interception AOP

推荐答案

试试这个 https://github.com/Fody/PropertyChanged

这将编织的实现INotifyPropertyChanged类型的所有属性，甚至处理的依赖。

It will weave all properties of types that implement INotifyPropertyChanged and even handles dependencies.

您code

public class Person : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    public string GivenNames { get; set; }
    public string FamilyName { get; set; }

    public string FullName
    {
        get
        {
            return string.Format("{0} {1}", GivenNames, FamilyName);
        }
    }

}

什么被编译

public class Person : INotifyPropertyChanged
{

    public event PropertyChangedEventHandler PropertyChanged;

    private string givenNames;
    public string GivenNames
    {
        get { return givenNames; }
        set
        {
            if (value != givenNames)
            {
                givenNames = value;
                OnPropertyChanged("GivenNames");
                OnPropertyChanged("FullName");
            }
        }
    }

    private string familyName;
    public string FamilyName
    {
        get { return familyName; }
        set 
        {
            if (value != familyName)
            {
                familyName = value;
                OnPropertyChanged("FamilyName");
                OnPropertyChanged("FullName");
            }
        }
    }

    public string FullName
    {
        get
        {
            return string.Format("{0} {1}", GivenNames, FamilyName);
        }
    }    

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

或者你可以使用属性更为精细的控制。

Or you can use attributes for more fine grained control.

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