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GetUserPreferredUILanguages()从不返回两种以上的语言

multilingual translation internationalization winapi windows

Frank Osterfeld · 技术社区 · 6 年前

我正在尝试从C++/Qt应用程序中检索用户首选语言的完整列表,如“Region&用户首选项中的“语言”页:

为此,我尝试使用WinAPI函数 GetUserPreferredUILanguages()

我还看了 User Interface Language Management ,但无济于事。例如,GetSystemPreferredUILanguages()只返回“en-US”。 GetUILanguageFallbackList() 返回[“de de”,“de”,“en-US”,“en”]。

我使用的代码:

// calling GetUserPreferredUILanguages() twice, once to get number of 
// languages and required buffer size, then to get the actual data

ULONG numberOfLanguages = 0;
DWORD bufferLength = 0;
const auto result1 = GetUserPreferredUILanguages(MUI_LANGUAGE_NAME,
                                                 &numberOfLanguages,
                                                 nullptr,
                                                 &bufferLength);
// result1 is true, numberOfLanguages=2

QVector<wchar_t> languagesBuffer(static_cast<int>(bufferLength));
const auto result2 = GetUserPreferredUILanguages(MUI_LANGUAGE_NAME,
                                                 &numberOfLanguages,
                                                 languagesBuffer.data(),
                                                 &bufferLength);

// result2 is true, languageBuffer contains "de-de", "en-US"

这不是应该使用的函数,还是我误解了Windows10的语言配置?如何获得首选语言的完整列表?我懂了 UWP API

0 回复 | 直到 6 年前

emk 4 年前

GlobalizationPreferences.Languages 可以从非托管C++中使用,因为 GlobalizationPreferences 有 DualApiPartitionAttribute . 下面是一个使用 GlobalizationPreferences.语言 :

#pragma once
#include <winrt/Windows.Foundation.Collections.h>
#include <winrt/Windows.System.UserProfile.h>
#include <iostream>
#pragma comment(lib, "windowsapp")

using namespace winrt;
using namespace Windows::Foundation;
using namespace Windows::System::UserProfile;

int main()
{
    winrt::init_apartment();

    for (const auto& lang : GlobalizationPreferences::Languages()) {
        std::wcout << lang.c_str() << std::endl;
    }
}

#include <roapi.h>
#include <wrl.h>
#include <Windows.System.UserProfile.h>
#include <iostream>
#include <stdint.h>
#pragma comment(lib, "runtimeobject.lib")

using namespace Microsoft::WRL;
using namespace Microsoft::WRL::Wrappers;
using namespace ABI::Windows::Foundation::Collections;
using namespace ABI::Windows::System::UserProfile;

int main()
{
    RoInitializeWrapper initialize(RO_INIT_MULTITHREADED);
    if (FAILED(initialize)) {
        std::cerr << "RoInitialize failed" << std::endl;
        return 1;
    }

    ComPtr<IGlobalizationPreferencesStatics> gps;
    HRESULT hr = RoGetActivationFactory(
        HStringReference(
            RuntimeClass_Windows_System_UserProfile_GlobalizationPreferences)
            .Get(),
        IID_PPV_ARGS(&gps));
    if (FAILED(hr)) {
        std::cerr << "RoGetActivationFactory failed" << std::endl;
        return 1;
    }

    ComPtr<IVectorView<HSTRING>> langs;
    hr = gps->get_Languages(&langs);
    if (FAILED(hr)) {
        std::cerr << "Could not get Languages" << std::endl;
        return 1;
    }

    uint32_t size;
    hr = langs->get_Size(&size);
    if (FAILED(hr)) {
        std::cerr << "Could not get Size" << std::endl;
        return 1;
    }
    for (uint32_t i = 0; i < size; ++i) {
        HString lang;
        hr = langs->GetAt(i, lang.GetAddressOf());
        if (FAILED(hr)) {
            std::cerr << "Could not get Languages[" << i << "]" << std::endl;
            continue;
        }
        std::wcout << lang.GetRawBuffer(nullptr) << std::endl;
    }
}