我想创建一个使用MAF WPF的一个非常简单的画图程序。

I would like create a very simple Paint application using MAF on WPF.

该加载项我想创建是：

问题是：我怎么能在不同的加载项之间不使用主机交互

the question is: How I can interact between the different Add-Ins without using the host?

谢谢，    罗尼

推荐答案

我的方式做到这一点是主机收集每个加载到一个集合，因为它们可以被发现，然后将该集合传递给每增加 - 在它初始化。什么你传递给加载项是其他加载项界面，因为这是真正的所有主机知道它们。

The way I do it is for the host to gather each add-in into a collection as they're being discovered, and then pass that collection to each add-in as it initializes it. What you're passing to the add-ins are the other add-ins' interfaces, as that's really all the host knows about them.

应该初始化主机每个加载项，然后一旦他们全部初始化，它们的信号激活，在那里他们然后发现的其他加载项，然后去做自己的事情。每一个加载项应公开一个WhoAreYou方法，使他们能够找到谁，当他们正在启动其他的安装了。从基类派生您的加载项将简化。一旦你理解了它的一个，那么它的完成了所有的人。

The host should initialize each add-in, and then once they're all initialized, signal them to activate, where they then discover the other add-ins and go do their thing. Each add-in should expose a WhoAreYou method so that they can find out who else is installed when they're activated. Deriving your add-ins from a base class will simplify this. Once you've figured it out for one then it's done for all of them.

此方法只使用主机来收集和分发的外接接口，与加载项之间通过主机直接通信的路由信息​​，通过合同的管道来代替。

This approach only uses the host to collect and distribute the add-in interfaces, with the add-ins communicating directly with each other through the contract pipeline instead of routing messages through the host.