嵌入 C++库到 .Net 库

发布于 2024-09-12 10:09:18 字数 164 浏览 5 评论 0原文

在我的 .Net 程序集中，我必须使用一些本机 (C++) dll。通常我们需要将C++ dll复制到bin文件夹中并使用PInvoke来调用它。为了节省分发成本，我想将 C++ 直接嵌入到我的 .Net dll 中，这样分发的程序集数量就会更少。

知道如何做到这一点吗？

原文

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

隔岸观火 2024-09-19 10:09:18

您可以将本机 DLL 作为资源嵌入。

然后在运行时，您必须将这些本机 DLL 提取到临时文件夹中；当您的应用程序启动时，您不一定具有对应用程序文件夹的写入权限：想想 Windows Vista 或 Windows 7 和 UAC。因此，您将使用此类代码从特定路径加载它们：

public static class NativeMethods {

  [DllImport("kernel32")]
  private unsafe static extern void* LoadLibrary(string dllname);

  [DllImport("kernel32")]
  private unsafe static extern void FreeLibrary(void* handle);

  private sealed unsafe class LibraryUnloader
  {
    internal LibraryUnloader(void* handle)
    {
      this.handle = handle;
    }

    ~LibraryUnloader()
    {
      if (handle != null)
        FreeLibrary(handle);
    }

    private void* handle;

  } // LibraryUnloader


  private static readonly LibraryUnloader unloader;

  static NativeMethods()
  {
    string path;

    // set the path according to some logic
    path = "somewhere/in/a/temporary/directory/Foo.dll";    

    unsafe
    {
      void* handle = LoadLibrary(path);

      if (handle == null)
        throw new DllNotFoundException("unable to find the native Foo library: " + path);

      unloader = new LibraryUnloader(handle);
    }
  }
}

You would embed your native DLLs as resources.

Then at runtime, you would have to extract those native DLLs into a temporary folder; you don't necessarily have write access to the application folder when your application launches: think windows vista or windows 7 and UAC. As a consequence, you would use this kind of code to load them from a specific path:

public static class NativeMethods {

  [DllImport("kernel32")]
  private unsafe static extern void* LoadLibrary(string dllname);

  [DllImport("kernel32")]
  private unsafe static extern void FreeLibrary(void* handle);

  private sealed unsafe class LibraryUnloader
  {
    internal LibraryUnloader(void* handle)
    {
      this.handle = handle;
    }

    ~LibraryUnloader()
    {
      if (handle != null)
        FreeLibrary(handle);
    }

    private void* handle;

  } // LibraryUnloader


  private static readonly LibraryUnloader unloader;

  static NativeMethods()
  {
    string path;

    // set the path according to some logic
    path = "somewhere/in/a/temporary/directory/Foo.dll";    

    unsafe
    {
      void* handle = LoadLibrary(path);

      if (handle == null)
        throw new DllNotFoundException("unable to find the native Foo library: " + path);

      unloader = new LibraryUnloader(handle);
    }
  }
}

回复收藏 0 原文