小编Sia*_* S.的帖子

我需要使用c#late binding features在运行时根据对象的类型调用方法重载.当所有重载都在调用发生的同一个类中定义时,它工作正常.但是当在派生类中定义重载时,它不会在运行时绑定.

class BaseT
{}

class DerivedA : BaseT
{}

class DerivedB : BaseT
{}

class Generator
{
    public void Generate(IEnumerable<BaseT> objects)
    {
        string str = "";
        foreach (dynamic item in objects)
        {
            str = str + this.Generate(item); //throws an exception on second item
        }
    }

    protected virtual string Generate(DerivedA a)
    {
        return " A ";
    }        
}

class DerivedGenertor : Generator
{
    protected virtual string Generate(DerivedB b)
    {
        return " B ";
    }
}



class Program
{
    static …