接口中的通用事件Args

Question

我试图在一个通用的EventArgs类中保存一个对象,但由于EventHandler有一个接口,我很难完成这个.有什么办法让这样的工作吗？

我的EventArgs类:

public class PositionChangedEventArgs<T>
{
   public PositionChangedEventArgs(byte position, T deviceArgs)
   {
       Position = position;
       DeviceArgs = deviceArgs;
   }

   public byte Position { get; private set; }
   public T DeviceArgs { get; private set; }
}

正在使用的接口:

public interface IMoveable
{
    event EventHandler<PositionChangedEventArgs<T>> PositionChanged;
}

示例类用法:

public class SomeDevice : IMoveable
{
   public event EventHandler<PositionChangedEventArgs<DeviceSpecificEventMessageArgs>> PositionChanged; //Compiler doesn't like this
}

Answer 1

您需要将接口定义更改为以下内容:

public interface IMoveable<T>
{
    event EventHandler<PositionChangedEventArgs<T>> PositionChanged;
}

您可以通过将类型传递给接口来使用它,如下所示:

public class SomeDevice : IMoveable<DeviceSpecificEventMessageArgs>
{
   public event EventHandler<PositionChangedEventArgs<DeviceSpecificEventMessageArgs>> PositionChanged; 
}