是否可以从.NET测试COM暴露的程序集？ [英] Is it possible to test a COM-exposed assembly from .NET?

问题描述

我有一个.NET程序集，我通过一个tlb文件暴露给COM和一个安装程序注册tlb。我已手动检查安装程序是否正常工作，并且COM客户端可以访问库。到目前为止，这么好...

然而，我试图把一些自动化系统测试，检查安装程序是否正常工作。作为其中的一部分，我已经在VM上自动化安装，现在我想对安装的COM库进行一些调用，以验证它是否正常工作。我最初想到在VB6中编写一些测试，但我已经有一个大套的测试用C＃编写，它引用.NET程序集。我希望我可以改变这些参考.tlb，但我得到一个错误，当我尝试这VS2008：

ActiveX类型库'blah.tlb'是从.NET程序集导出的，无法作为参考添加。

是否有任何方法可以愚弄VS2008允许我添加这个引用，也许通过编辑tlb文件？

Google搜索没有找到任何解决方案。我找到的是一个Microsoft Connect文章，说明这是按设计： http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=120882

解决方案

我得到一个解决方案的最接近的是如下：

  using System; 
 class ComClass 
 {
 public bool CallFunction（arg1，arg2）
 {
类型ComType; 
 object ComObject; 
 
 ComType = Type.GetTypeFromProgID（Registered.ComClass）; 
 //创建一个COM注册对象的实例。 
 ComObject = Activator.CreateInstance（ComType）; 
 
 object [] args = new object [2]; 
 args [0] = arg1; 
 args [1] = arg2; 
 
 //调用方法并将返回值转换为任何值。 
 return（bool）ComType.InvokeMember（MethodToCall，BindingFlags.InvokeMethod，null，ComObject，args））
} 
} 
  pre> 
 
 
这不是很漂亮，但我认为。你当然可以把ComObject实例化到一个构造函数中，并将其余的调用包装到对象中，但是测试代码可能不需要。 
 
I have a .NET assembly which I have exposed to COM via a tlb file, and an installer which registers the tlb. I have manually checked that the installer works correctly and that COM clients can access the library. So far, so good...

However, I am trying to put together some automated system tests which check that the installer is working correctly. As part of that I have automated the installation on a VM, and I now want to make some calls to the installed COM library to verify that it is working correctly. I originally thought about writing some tests in VB6, but I already have a large suite of tests written in C#, which reference the .NET assembly. I was hoping that I could change these to reference the .tlb, but I get an error when I try this within VS2008:

The ActiveX type library 'blah.tlb' was exported from a .NET assembly and cannot be added as a reference.

Is there any way I can fool VS2008 into allowing me to add this reference, perhaps by editing the tlb file? 

Googling hasn't come up with any solutions. All I've found is a Microsoft Connect article stating that this is "By Design": http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=120882
解决方案
The Closest I've gotten to a solution is something like the following:
using System;
class ComClass
{
    public bool CallFunction(arg1, arg2)
    {
        Type ComType;
        object ComObject;

        ComType = Type.GetTypeFromProgID("Registered.ComClass");
        // Create an instance of your COM Registered Object.
        ComObject = Activator.CreateInstance(ComType);

        object[] args = new object[2];
        args[0] = arg1;
        args[1] = arg2;

        // Call the Method and cast return to whatever it should be.
        return (bool)ComType.InvokeMember("MethodToCall", BindingFlags.InvokeMethod, null, ComObject, args))
    }
}
It's not very pretty, but I think gets the point across.  You could of course put the ComObject instantiation into a constructor and wrap the rest of the calls to the object, but probably not necessary for test code. 

                        
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