注册免费COM与C#互操作,可能吗？

Question

是否可以使用注册免费COM与Dotnet互操作和C#？如果是这样,如何在C#项目中添加对COM对象的引用？

我有一个免费的ATL COM服务器DLL,带有嵌入式清单和两个测试客户端,一个cpp,另一个c#.cpp客户端使用import语句正确引用COM对象

#pragma comment(linker, "\"/manifestdependency:type='win32' name='TestComSvr2' version='1.0.0.0'\"")

或者在Linker-> Manifest File选项下将'Additional Manifest Dependencies'设置为"type ='win32'name ='TestComSvr1'version ='1.0.0.0'",之后cpp客户端只要COM组件正确运行在同一目录中.

c#客户端虽然拒绝播放.

尝试将文件引用添加到未注册的COM组件dll或未注册的tlb会导致错误:

"无法添加对'blah blah'的引用.请确保该文件是可访问的,并且它是一个有效的程序集或COM组件".

仅使用'regtlib TestComSvr'注册类型库,然后创建文件或COM引用,导致c#项目无法构建:

"加载类型库/ DLL时出错.(HRESULT异常:0x80029C4A(TYPE_E_CANTLOADLIBRARY))".

通常在c#项目中注册COM组件并创建引用,将引用设置为Isolated,构建c#项目然后取消注册组件并运行c#项目会导致此异常:

由于以下错误,检索具有CLSID {B1D0A80F-0050-4856-BACD-87D664E58CBE}的组件的COM类工厂失败:80040154未注册类(HRESULT异常:0x80040154(REGDB_E_CLASSNOTREG)).

注意:即使这有效,但无论如何它都不是一个有用的案例,因为最终它仍然需要注册组件,我只是测试它的彻底性.

到目前为止,我能够从C#引用COM对象的唯一方法是通过注册COM对象本身,这当然完全违背了这一点,从那以后它根本就没有注册.

有人有任何想法吗？

(这是在带有VS2010 sp1的WinXP上).

Answer 1

你需要:

• 将免注册的COM条目添加到程序集清单xml文件中,以及
• 将该清单构建到您的C#可执行文件中.

1. 您需要提供免注册的COM程序集清单,其中表明您对Neutrino.TestComSvr2程序集的依赖性:

   <?xml version="1.0" encoding="utf-8"?>
   <asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" 
               xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" 
               xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" 
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   
      <assemblyIdentity version="1.0.0.0" name="MyApplication.app"/>
   
      <!-- We depend on our COM object -->
      <dependency>
         <dependentAssembly>
             <assemblyIdentity type="win32" name="Neutrino.TestComSvr2" version="1.0.0.0" />
         </dependentAssembly>
      </dependency>
   
   
      <!-- 
          Everything else in this sample manifest is not relavent to this answer, 
          but every developer should be doing their job and writing correct 
          Windows programs 
      -->
   
      <!-- Disable file and registry virtualization. -->
      <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
         <security>
            <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
               <requestedExecutionLevel level="asInvoker" uiAccess="false" />
            </requestedPrivileges>
         </security>
      </trustInfo>
   
      <!-- We are high-dpi aware on Windows Vista -->
      <asmv3:application xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">
         <asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
            <dpiAware>true</dpiAware>
         </asmv3:windowsSettings>
      </asmv3:application>
   
      <!-- Declare that we were designed and tested on Windows 7-->
      <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
         <application>
             <!--The ID below indicates application support for Windows 7 -->
             <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
             <!--The ID below indicates application support for Windows Vista -->
             <!-- supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/ -->
         </application>
      </compatibility>
   
      <!-- We depend on Common Controls version 6 (i.e. "enable themes") -->
      <dependency>
         <dependentAssembly>
            <assemblyIdentity
                  type="win32"
                  name="Microsoft.Windows.Common-Controls"
                  version="6.0.0.0"
                  processorArchitecture="*"
                  publicKeyToken="6595b64144ccf1df"
                  language="*"
            />
         </dependentAssembly>
      </dependency>
   

   注意:我在我的问题中有一个类似的清单来自ASP.NET的免注册COM？

2. 然后,您需要在C#exe中包含此应用程序清单:

   1. 在解决方案资源管理器中右键单击该项目.
   2. 单击"添加新项".
   3. 选择"应用程序清单文件".

这些步骤类似于MSDN上可以在托管应用程序中添加清单的步骤.

您还需要确保您的Neutrino.TestComSvr2程序集包含它的无注册COM条目:

Neutrino.TestComSvr2.manifest

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">

   <assemblyIdentity type="win32" name="Neutrino.TestComSvr2" version="1.0.0.0" />

   <file name = "ContosoFrobber.dll">

      <comClass
            progid="Frobber.Gizmo"
            clsid="{00028C00-0000-0000-0000-000000000046}"
            description="Gizmo Frobber by Contoso"
            threadingModel = "Apartment" />

      <typelib 
            tlbid="{00028C01-0000-0000-0000-000000000046}"
            version="1.0" 
            helpdir=""/>
   </file>
</assembly>

和blingo blango,你应该工作.