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How to use the HttpClient class in Visual C++ 2017
void cpp_uwp::json_test::Button_Click_1(Platform::Object^ sender, Windows::UI::Xaml::RoutedEventArgs^ e)
using namespace Windows::Web::Http;
using namespace Windows::Storage::Streams;
ActivityIndicator1->IsActive = true;
IHttpClient^ NetHttp1 = ref new HttpClient();
concurrency::create_task(NetHttp1->GetAsync(ref new Uri("https://うあーるえる"))).then([this](IHttpResponseMessage^ res) {
concurrency::create_task(res->Content->ReadAsBufferAsync()).then([this](IBuffer^ buf) {
std::function<Platform::String ^ (std::string)> Utf8ToPlatformString{ [](std::string stin) {
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t> > converter;
return ref new Platform::String(converter.from_bytes(stin.c_str()).c_str());
} };
DataReader^ BufRead = DataReader::FromBuffer(buf);
Platform::Array<unsigned char>^ arr_stream = ref new Platform::Array<unsigned char>(buf->Length);
std::stringstream ss1;
for (int i = 0; i < buf->Length; ++i)
ss1 << static_cast<char>(arr_stream[i]);
Edit1->Text = Utf8ToPlatformString(ss1.str());
ActivityIndicator1->IsActive = false;
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