处理基类异常

Question

我有一个以下的C#场景 - 我必须在基类中处理实际发生在派生类中的异常.我的基类看起来像这样:

public interface A
{
    void RunA();
}
public class Base
    {
        public static void RunBase(A a)
        {
            try
            {
                a.RunA();
            }
            catch { }
        }
    }

派生类如下:

public class B: A
{
        public void RunA()
        {
            try
            {
                //statement: exception may occur here
            }
            catch{}
    }
}

我想处理异常,比方说C,发生在B(在//语句上面).异常处理部分应该写在RunBase内的基类catch中.如何才能做到这一点？

Answer 1

public class Base
{
    public static void RunBase(A a)
    {
        try
        {
            a.RunA();
        }
        catch(SomeSpecialTypeOfException ex)
        { 
            // Do exception handling here
        }
    }
}

public class B: A
{
    public void RunA()
    {
        //statement: exception may occur here
        ...

        // Don't use a try-catch block here. The exception
        // will automatically "bubble up" to RunBase (or any other
        // method that is calling RunA).
    }
}