垂头丧气无法正常工作.我做错了吗?

问题描述

我正在从程序集中加载类并尝试实例化和实例.

这就是我所拥有的

I am loading a class from an assembly and trying to instantiate and instance.

Here''s what I have

public interface IActivity

public abstract class BaseActivity:IActivity

public class MyActivity:BaseActivity //I don't really call stuff MyXxx

并加载它:

And to load it:

Type type = validIActivityTypes.Single(); //I've already performed my checks for this
ConstructorInfo constructor = type.GetConstructor(Type.EmptyTypes);
if (constructor == null)
   return result;
IActivity activity = (IActivity)constructor.Invoke(null);

此时，类型"是"MyActivity"，但是...

动臂:

At this point, the ''type'' is ''MyActivity'' but...

Boom:

报价:

ServerControls.dll中发生类型为"System.InvalidCastException"的第一次机会异常.

附加信息:无法将类型为"WorkFlowEngine.Activities.MyActivity"的对象转换为类型为"WorkFlowEngine.Interfaces.IActivity".

A first chance exception of type ''System.InvalidCastException'' occurred in ServerControls.dll

Additional information: Unable to cast object of type ''WorkFlowEngine.Activities.MyActivity'' to type ''WorkFlowEngine.Interfaces.IActivity''.

我做错了什么?

谢谢

刚刚测试type.GetInterfaces():

What am I doing wrong?

Thanks

Just tested type.GetInterfaces():

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