问题描述
如何将 C# DLL 制作成可供 VB6 应用程序使用的 COM 互操作 DLL?
How do I make a C# DLL into a COM interop DLL that can be consumed by a VB6 application?
推荐答案
这是我想在 StackOverflow 中找到但找不到的答案.事实证明，将简单的 C# dll 转换为 COM dll 相当容易.
This is the answer I wanted to find in StackOverflow but couldn't. It turns out to be fairly easy to turn a simple C# dll into a COM dll.
使用 C# 类项目创建解决方案.该类应该有一个属性/方法的接口和一个事件的接口.将 GUID 属性分配给类和接口，如 MSDN - 示例 COM 类(C# 编程)中所述指南).另请参阅:MSDN - 如何:引发已处理的事件通过 COM 接收器.
Create a solution with a C# class project. The class should have an interface for the properties/methods and an interface for the events. Assign GUID attributes to the class and interfaces as described in MSDN - Example COM Class (C# Programming Guide). Also see: MSDN - How to: Raise Events Handled by a COM Sink.
在项目属性 > 应用程序选项卡 > 程序集信息按钮 > 选中使程序集 COM-Visible".这使得 COM 类中的所有公共方法都可见.
In Project Properties > Application tab > Assembly Information button > check "Make assembly COM-Visible". This makes all public methods in the class COM visible.
在项目属性 > 构建选项卡 > 将平台目标"设置为 x86.
In Project Properties > Build tab > Set "Platform target" to x86.
这就是创建 DLL 所需要做的一切.调用DLL需要先注册.
That's all you need to do to create the DLL. To call the DLL, you need to register it.
您可以通过以下方式之一注册 DLL:
You can register the DLL one of these ways:
- 检查项目属性 > 构建选项卡 > 注册 COM 互操作".这将在您构建 DLL 时自动注册它.
使用 RegAsm 手动注册 DLL.这允许您在您选择的目录中注册 DLL，而不是在构建目录中.这是我使用的方法.
- Check Project Properties > Build Tab > "Register for COM Interop". This will automatically register the DLL when you build it.
Manually register the DLL with RegAsm. This allows you to register the DLL in the directory of your choice, rather than in the build directory. This is the method I used.
- 不要检查项目属性>构建选项卡>注册COM互操作"
- 将 DLL 复制到要注册的目录中
使用管理员权限打开命令外壳并键入
- Do not check Project Properties > Build Tab > "Register for COM Interop"
- Copy the DLL to the directory where you want to register it
Open a command shell with administrator rights and type
RegAsm.exe -tlb -codebase mydll.dll
RegAsm.exe 可以在C:WindowsMicrosoft.NETFrameworkv2.0.50727"中找到，而mydll.dll"是您的 DLL 的名称；tlb 意思是创建一个类型库"；codebase 表示将目录位置写入注册表，假设它没有放在 GAC 中".
RegAsm.exe can be found in "C:WindowsMicrosoft.NETFrameworkv2.0.50727", while "mydll.dll" is the name of your DLL; tlb means "create a type library";
codebase means "write the directory location to the Registry, assuming it is not being placed in the GAC".
RegAsm 将显示程序集应该是强命名的警告.你可以忽略它.
RegAsm will display a warning that the assembly should be strong-named. You can ignore it.
此时，您应该可以在 VB6 中添加对 COM DLL 的引用，使用 Intellisense 查看它，并像普通 COM DLL 一样运行它.
At this point, you should be able to add a reference to the COM DLL in VB6, see it with Intellisense, and run it just like a regular COM DLL.
如果您使用 InstallShield 将 DLL 与应用程序的其余部分一起安装，请执行以下操作.
If you are using InstallShield to install the DLL along with the rest of your application, do the following.
在 InstallShield 中，将新组件添加到组件列表中.请记住将组件与功能相关联.将组件属性.NET COM Interop"设置为是.
In InstallShield, add a new Component to the Components list. Remember to associate the Component with a Feature. Set component property ".NET COM Interop" to Yes.
将 .dll 文件添加到组件的文件部分.不要检查自助注册"属性.右键单击 .dll 文件并选择设置密钥文件".
Add the .dll file to the Files section of the Component. Do not check the "Self-Register" property. Right-click on the .dll file and select "Set Key File".
将 .tlb 文件添加到组件的文件部分.检查Self-Register"属性.
Add the .tlb file to the Files section of the Component. Check the "Self-Register" property.
目标 PC 上需要存在正确版本的 .Net Framework.
The correct version of the .Net Framework needs to exist on the target PC.
就是这样.
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