系统在C＃插件 [英] System with plugins in C#

问题描述

我要开发一个系统，以监测传感器信息，但许多传感器可能会在将来增加。

I have to develop a system to monitor sensor information, but many sensors might be added in the future.

这是说，这个想法是开发出将包括应用程序框架的系统。传感器（如他们每个人都有其通信和数据presentation特性）将被添加为插件到系统中。

That said, the idea would be to develop a system that would consist of the application skeleton. The sensors (as each of them has its communication and data presentation characteristics) would be added as plugins to the system.

我怎么会code这在C＃？它是组件驱动发展的情况？我应该使用动态库？

How would I code this on C#? Is it a case of component-driven development? Should I use dynamic libraries?

推荐答案

有一个巨大的C＃特设插件系统的数量。一种是使用C＃中的 插件架构描述 （在的code项目）。一般的做法是，主机应用程序发布与接口的组件。它通过枚举一个文件夹，并认为确定实现其接口并加载它们的类组件和实例化类。

There are a huge number of ad-hoc plug-in systems for C#. One is described in Plugin Architecture using C# (at The Code Project). The general approach is that the host application publishes an assembly with interfaces. It enumerates through a folder and finds assemblies that define a class that implement its interfaces and loads them and instantiates the classes.

在实践中你想要做的更多。这是最好的，如果主机应用程序定义了两个接口，一个IHost和IPlugIn。所述IHost接口提供一个插件可以订阅服务。该IPlugIn被构造服用IHost。

In practice you want to do more. It's best if the host application defines two interfaces, an IHost and an IPlugIn. The IHost interface provides services that a plug-in can subscribe to. The IPlugIn gets constructed taking an IHost.

要加载插件，你应该做更多的不是简单地得到一个插件。你应该列举所有的插件是可装载。构建他们每人。问他们是否可以运行。让他们的API导出到主机。让他们从主机导入的API。外挂插件应能询问其他插件的存在。

To load a plug-in, you should do more than simply get a plug-in. You should enumerate all plug-ins that are loadable. Construct them each. Ask them if they can run. Ask them to export APIs into the host. Ask them to import APIs from the host. Plug-ins should be able to ask about the existence of other plug-ins.

这种方式，插件可以通过提供多个API扩展应用程序。

This way, plug-ins can extend the application by offering more APIs.

插件应包括事件。这样的插件可以监视插件装载和卸载的过程。

PlugIns should include events. This way plug-ins can monitor the process of plug-ins loading and unloading.

在世界的尽头，你应该警告说，他们将离开插件。然后带他们出去。

At the end of the world, you should warn plug-ins that they're going to go away. Then take them out.

这将离开你，可以写在一个很小的框架，如果你想让它在插件中完全实现的应用程序。

This will leave you with an application that can be written in a tiny framework and implemented entirely in plug-ins if you want it to.

作为额外的奖励，你也应该让这个在插件文件夹，您解析快捷方式插件。这使您可以编写应用程序，并提供给别人。他们可以在自己的开发环境中编写一个插件，在应用程序的插件文件夹创建一个快捷方式到它，而不是担心每次编译后的部署。

As an added bonus, you should also make it so that in the plug-ins folder, you resolve shortcuts to plug-ins. This lets you write your application and deliver it to someone else. They can author a plug-in in their development environment, create a shortcut to it in the application's plug-ins folder and not have to worry about deploying after each compile.

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