从 cs 文件加载脚本并访问主机方法、属性等? [英] Loading a script from a cs file and accessing host methods, properties etc?

问题描述

我只是想和 Roslyn 一起玩，但不确定如何执行以下操作.

I'm just having a play with Roslyn but unsure on how to do the following.

为了简单起见，假设我有一个主机程序，它具有这样的方法

To keep this simple, lets say I have a host program which has a method like so

public void DisplayMessage(string message)
{
   MessageBox.Show(message);
}

然后我可以有一个名为 MyScript.csx 的脚本文件，然后在脚本中的某处有类似的东西

Can I then have a script file called MyScript.csx and then somewhere in the script have something like

void Main()
{
   Host.DisplayMessage("I am a script");
}

然后我让主机加载文件并执行它.

Then I have the host load the file and execute it.

如果这种事情做不到，有没有基于c#的脚本系统/引擎可以做到?这些是要求

If this sort of thing can't be done, is there a scripting system/engine based on c# that can do it? These are the requirements

1. 宿主应用程序可以从文件加载脚本.
2. 脚本文件是用 c# 编写的，因此可以使用 VS2010 和语法等编写
3. 脚本文件可以访问主机公共方法、属性等

推荐答案

是的，您可以使用 Roslyn 做您想做的事.

Yes, you can do what you want using Roslyn.

首先，创建一个具有公共 DisplayMessage 方法的公共 Host 类(或使用现有类).然后创建 ScriptEngine，指定包含 Host 的程序集作为引用.之后，您可以对您的文件调用 ExecuteFile()，将 Host 对象作为另一个参数:

First, create a public Host class that has a public DisplayMessage method (or use a existing class). Then create ScriptEngine, specifying the assembly that contains Host as a reference. After that, you can call ExecuteFile() on your file, with the Host object as another parameter:

var engine = new ScriptEngine(references: new[] { typeof(Host).Assembly });
engine.ExecuteFile("MyScript.csx", new Host());

脚本文件不需要任何Main()方法，直接调用宿主对象的方法:

The script files doesn't need any Main() method, and you call the method on the host object directly:

DisplayMessage("I am a script");

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