创建一个COM自动化服务器在C＃ [英] Creating a COM Automation Server in C#

问题描述

我现在有一个.NET类库C＃编写的，它通过COM公开其functionaility的C ++程序（pre-.NET）。

I currently have a .NET class library written in C# that exposes its functionaility via COM to a C++ program (pre-.NET).

我们现在要移动的库外的过程中释放的地址空间中的主应用程序（这是一个图像处理应用程序和大型图片吃起来的地址空间）。我记得从我的VB6的日子，人们可以创建一个OLE自动化服务器。该操作系统将自动启动和停止的.exe作为创建对象/销毁服务器。这看起来像是一个完美的适合我们：。据我什么也看不到，在客户端会改变，除非它会调用CoCreateInstance与CLSCTX_LOCAL_SERVER而不是CLSCTX_INPROC_SERVER

We now want to move the library out-of-process to free up address space in the main application (it is an image-processing application, and large images eat up address space). I remember from my VB6 days that one could create an "OLE automation server". The OS would automatically start and stop the server .exe as objects were created/destroyed. This looks like the perfect fit for us: as far as I can see nothing would change in the client except it would call CoCreateInstance with CLSCTX_LOCAL_SERVER instead of CLSCTX_INPROC_SERVER.

我将如何创建进程外的这样一个在C＃中的服务器？无论是在网上有没有关于它的信息，或者我的术语是关闭/过时！

How would I create such an out-of-process server in C#? Either there is no information online about it, or my terminology is off/out of date!

推荐答案

您可以真正做到这一点的。NET（我以前做过的证明型的概念），但它的一些工作得到一切工作的权利（生命周期过程中，注册等）。

You can actually do this in .NET (I've done it before as a proof-of-concept), but it's a bit of work to get everything working right (process lifetime, registration, etc).

创建一个新的Windows应用程序。在Main方法，调用RegistrationServices.RegisterTypeForComClients-这大约是CoRegisterClassObject的托管包装的照顾类工厂为您服务。通过它的管理标记有ComVisible特性的类（你真的想create- .NET自动提供类工厂的）以及RegistrationClassContext.LocalServer和RegistrationConnectionType.SingleUse的类型。现在你有一个可以被注册为LocalServer32的COM激活一个非常基本的exe文件。你还必须制定出流程的生命周期（引用计数实现与构造函数/ finalizers-被管理的对象，当你打零，呼叫UnregisterTypeForComClients和出口） - 你不能让主退出，直到所有的对象都死了。

Create a new Windows application. In the Main method, call RegistrationServices.RegisterTypeForComClients- this is a managed wrapper around CoRegisterClassObject that takes care of the class factory for you. Pass it the Type of the managed ComVisible class (the one you actually want to create- .NET supplies the class factory automatically) along with RegistrationClassContext.LocalServer and RegistrationConnectionType.SingleUse. Now you have a very basic exe that can be registered as a LocalServer32 for COM activation. You'll still have to work out the lifetime of the process (implement refcounts on the managed objects with constructors/finalizers- when you hit zero, call UnregisterTypeForComClients and exit)- you can't let Main exit until all your objects are dead.

注册是不是太糟糕了：创建一个ComRegisterFunction归因方法，增加了在HKLM \ CLSID（yourclsidhere），其默认值为的路径EXE一个LocalServer32项。运行regasm yourexe.exe / codeBase类/ TLB，你是好去。

The registration isn't too bad: create a ComRegisterFunction attributed method that adds a LocalServer32 key under HKLM\CLSID(yourclsidhere), whose default value is the path to your exe. Run regasm yourexe.exe /codebase /tlb, and you're good to go.

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