0

在设置或获取属性之前,应该执行一个方法,这在编译时是不知道的?是否可以将方法添加为运行时?

public string MyName 
{
    get 
    { 
        //A Methode should called here
        return m_ASD; 
    }
    set 
    { 
        //A Methode should called here
        m_ASD = value; 
    }
}
4

1 回答 1

5

最简单的解决方案是提供可以在运行时设置的钩子:

public Action OnMyNameSet { get; set; }
public Action OnMyNameGet { get; set; }
public string MyName
{
    get
    {
        if (OnMyNameGet != null) { OnMyNameGet(); }
        return m_ASD;
    }
    set
    {
        if (OnMyNameSet != null) { OnMyNameSet(); }
        m_ASD = value;
    }
}

用法:

MyClass c = new MyClass();
c.OnMyNameSet = NameOfSomeMethod;
c.MyName = ...;                   // also executes NameOfSomeMethod();

或者,您可以创建消费者可以附加到的事件。这就是钩子通常在 .NET 框架中实现的方式。

public event EventHandler OnMyNameSet;
public event EventHandler OnMyNameGet;
public string MyName
{
    get
    {
        if (OnMyNameGet != null) { OnMyNameGet(this, EventArgs.Empty); }
        return m_ASD;
    }
    set
    {
        if (OnMyNameSet != null) { OnMyNameSet(this, EventArgs.Empty); }
        m_ASD = value;
    }
}

用法类似;但是请注意,使用 of+=代替=

MyClass c = new MyClass();
c.OnMyNameSet += NameOfSomeMethod;
c.MyName = ...;                   // also executes NameOfSomeMethod(sender, eventArgs);
于 2013-06-26T12:00:33.877 回答