如何从IronPython脚本将lambda表达式传递给C＃构造函数？

I'm integrating an IronPython scritping engine into my C# raytracer which, so far, has been a breeze even though I'm completely new to Python. There is one particular thing, though, that I need help with. I have a C# class which defines a constructor like this:

我正在将一个IronPython scritping引擎集成到我的C＃raytracer中，到目前为止，尽管我对Python完全不熟悉，但它仍然是轻而易举的。但是，有一件特别的事情，我需要帮助。我有一个C＃类，它定义了一个这样的构造函数：

public CameraAnimation(Action<Camera, float> animation)

In C#, I would instantiate this like so:

在C＃中，我会像这样实例化：

var camAnimation = new CameraAnimation((camera, time) => camera.Position += new Vector(1, 0, 0));

I can't quite figure out how to make a similar assignment for the Action object in IronPython, so how would the Python syntax look?

我无法弄清楚如何为IronPython中的Action对象做出类似的赋值，那么Python语法将如何呈现呢？

1 个解决方案

#1

Assuming I interpreted this right, and Action is a generic delegate, the below works (the stubs I used are included).

假设我解释了这一点，并且Action是一个通用委托，下面的工作（我使用的存根包括在内）。

Python:

蟒蛇：

import clr
clr.AddReference("IronPythonDelegates")

import IronPythonDelegates

def camActionPy(camera, time):
  print "Camera: " + str(camera) + ", time: " + str(time)

IronPythonDelegates.CameraAnimation(camActionPy);

CSharp:

CSHARP：

namespace IronPythonDelegates
{
    public class Camera{}

    public class CameraAnimation
    {
    private System.Action<Camera, float> animation;

    public CameraAnimation(System.Action<Camera, float> animation)
    {
        this.animation = animation;
        this.animation(new Camera(), 1.5f);
    }
    }
 }

I corrected the above to use System.Action, and it no longer requires explicit reflection. It's a bit weird though. For some reason, I could construct a user-created delegate like:

我更正了上面的内容以使用System.Action，它不再需要显式反射。虽然这有点奇怪。出于某种原因，我可以构建一个用户创建的委托，如：

explicitTestAction = IronPythonDelegates.TestAction[IronPythonDelegates.Camera, System.Single](camActionPy);
IronPythonDelegates.CameraAnimation(explicitTestAction);

but could not do so with System.Action. E.g. with

但是使用System.Action无法做到这一点。例如。同

explicitSystemAction = System.Action[IronPythonDelegates.Camera, System.Single](camActionPy)
IronPythonDelegates.CameraAnimation(explicitSystemAction);

explicitSystemAction is null. TestAction was just defined as:

explicitSystemAction为null。 TestAction刚刚被定义为：

public delegate void TestAction<T1, T2>(T1 one, T2 two);

But luckily either way it's fine to just do:

但幸运的是，无论哪种方式都可以：

CameraAnimation(System.Action)

要么

CameraAnimation(TestAction)

though for some reason I don't remember that working when I first tried...

虽然出于某种原因，我不记得我第一次尝试时的工作......

#1