如何在托管c ++中实现接口？

Question

这是我声明的界面:

[ServiceContract]
public interface class IShedluer
{
    [OperationContract]
    array<Object^>^ GetResult(UInt64 taskId);
}

这是尝试实现它的类:

ref class MyShedluer:IShedluer
{
    Shedluer ^shedluer;//this is NOT MyShedluer
public:
    MyShedluer(void);

    array<Object^>^ GetResult(UInt64 taskId)
    {
        return shedluer->GetResult(taskId);
    }
}

当我试图编译这个时,我得到了

Error   15  error C3766: 'MyShedluer' must provide an implementation for 
the interface method 'cli::array<Type> ^IShedluer::GetResult(unsigned __int64)'
d:\users\menkaur\documents\visual studio 2010\projects\MyProject\
\kernel\MyShedluer.h    78  1   MyProject.Kernel

我为什么要这个？

Answer 1

实现接口的正确语法是添加virtual:

ref class MyShedluer:IShedluer
{
public:
  virtual array<Object^>^ GetResult(UInt64 taskId);
}

编译器也告诉你,看看你的警告:

warning C4488: 'MyShedluer::GetResult' : requires 'virtual' keyword
to implement the interface method 'IShedluer::GetResult'