实现属性更改自动通知的最简单方法 [英] Simplest way to achieve automatic notification of property change

问题描述

我知道有实现 INotifyPropertyChanged 的​​解决方案，但没有一个像:引用这个库，创建/添加这个属性，完成(我在这里考虑面向方面编程).有谁知道一个非常简单的方法来做到这一点?如果解决方案是免费的，则加分.

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.

以下是一些相关链接(没有一个提供足够简单的答案):

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

• 方面示例(INotifyPropertyChanged 通过方面)
• LinFu
• INotifyPropertyChanged 自动接线或如何去除多余的代码
• INotifyPropertyChanged with Unity Interception AOP

推荐答案

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

它将编织实现 INotifyPropertyChanged 甚至处理依赖项的类型的所有属性.

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

您的代码

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);
        }
    }

}

编译什么

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));    
        }
    }
}

或者您可以使用属性进行更细粒度的控制.

Or you can use attributes for more fine grained control.

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