Windows 10 中的 CoCreateInstance 错误 0x80131700:无法使用 .NET 运行时 4.0 [英] CoCreateInstance error 0x80131700 in Windows 10: unable to work with .NET runtime 4.0

问题描述

我有一个在 Windows 10 企业版 20H2 Build 19042.1052 中运行的旧版 32 位应用程序，操作系统中预装了 .NET Framework 4.8 高级系列并处于活动状态.

I have a legacy 32 bit application running in Windows 10 Enterprise version 20H2 Build 19042.1052 with .NET Framework 4.8 Advanced Series pre-installed in the operating system and active.

遗留应用程序通过以下 C++ 代码作为 COM 对象加载一个用 C# 编写并使用目标框架 .NET 2.0 为 x86 构建的 .NET 程序集:

The legacy application loads a .NET assembly written in C# and built for x86 with target framework .NET 2.0 through the following C++ code as a COM object:

    #import "myassembly.tlb" no_namespace, raw_interfaces_only

    IMyClass *pMyClass = nullptr;

...

    HRESULT hr;
    CLSID clsid;

    // Load myassembly.dll as a COM object
    CoInitializeEx(nullptr, COINIT_MULTITHREADED);
    CLSIDFromString(OLESTR("{c0dc113c-3839-4427-8da5-35d768aff3d6}"), &clsid);          // This is the uuid of MyClass in myassembly.tlh
    hr = CoCreateInstance(clsid, nullptr, CLSCTX_INPROC_SERVER, __uuidof(IMyClass), reinterpret_cast<LPVOID *>(&pMyClass));
    if (FAILED(hr) || pMyClass == nullptr)
    {
        cout << "Cannot create COM Object\n";
        cout << "CoCreateInstance" << " hr = 0x" << std::hex << hr << " - ";
        std::wcout << getErrMsg(hr);
        CoUninitialize();
        return 1;
    }

我不想在 Windows 10 上安装 .NET framework 3.5，所以我为 .NET 程序集及其所有 .NET 依赖项添加了一个 .config 文件，如下所示:

I don't want to install the .NET framework 3.5 on Windows 10, so I added a .config file for the .NET assembly and for all its .NET dependencies like this:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
  <supportedRuntime version="v4.0"/>
  <supportedRuntime version="v2.0.50727"/>
</startup>
</configuration>

我尝试使用或不使用 useLegacyV2RuntimeActivationPolicy=true" 选项，但总是收到错误 0x80131700(未知错误")并弹出一个窗口，要求开始安装 .NET框架 3.5，我不想做，如上所述.事实上，如果我安装它，一切正常.

I tried with or without the useLegacyV2RuntimeActivationPolicy="true" option, but invariably I get an error 0x80131700 ("Unknown error") and a window pops up asking to start installation of .NET Framework 3.5, which I don't want to do, as said. Indeed, if I install it, everything is working fine.

有什么提示吗?

推荐答案

正如@Simon Mourier 在评论中指出的那样，问题是我需要添加一个 .config 文件，就像问题中的可执行文件 (myexe.exe.config) 而不是 .NET 程序集 (myassembly.dll.config).后一个其实没用.

As pointed out in the comments by @Simon Mourier, the problem was I needed to add a .config file like the one in the question for the executable (myexe.exe.config) rather than for the .NET assembly (myassembly.dll.config). The latter one is actually useless.

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