连接Azure IoT Hub时，PlatformNotsNotsupportedException在MACOS上扔在MAUI上

Question

我正在MacOS上探索MAUI。我正在移植WPF应用程序来评估功能。该应用程序正在连接到Azure IoT Hub实例。

这是似乎有问题的代码部分：

var iotHubConnectionStringBuilder = IotHubConnectionStringBuilder.Create("HostName=<iotHubConnectionString>");

var registryManager = RegistryManager.CreateFromConnectionString(iotHubConnectionStringBuilder.ToString());

当调用createfromConnectionsTring时，抛出了以下异常：

    Unhandled Exception:
           System.PlatformNotSupportedException: Operation is not supported on this platform.
at System.Net.Http.NSUrlSessionHandler.set_SslProtocols(SslProtocols value)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
--- End of stack trace from previous location ---
at System.Net.Http.HttpClientHandler.InvokeNativeHandlerMethod(String name, Object[] parameters)
at System.Net.Http.HttpClientHandler.SetSslProtocols(SslProtocols value)
at System.Net.Http.HttpClientHandler.set_SslProtocols(SslProtocols value)
at Microsoft.Azure.Devices.Client.Transport.HttpClientHelper..ctor(Uri baseAddress, IAuthorizationProvider authenticationHeaderProvider, IDictionary`2 defaultErrorMapping, TimeSpan timeout, Action`1 preRequestActionForAllRequests, X509Certificate2 clientCert, HttpClientHandler httpClientHandler, ProductInfo productInfo, IWebProxy proxy, Boolean isClientPrimaryTransportHandler)
at Microsoft.Azure.Devices.Client.Transport.HttpTransportHandler..ctor(IPipelineContext context, IotHubConnectionString iotHubConnectionString, Http1TransportSettings transportSettings, HttpClientHandler httpClientHandler, Boolean isClientPrimaryTransportHandler)
at Microsoft.Azure.Devices.Client.InternalClient..ctor(IotHubConnectionString iotHubConnectionString, ITransportSettings[] transportSettings, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, IAuthenticationMethod authenticationMethod, ITransportSettings[] transportSettings, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, IAuthenticationMethod authenticationMethod, TransportType transportType, IDeviceClientPipelineBuilder pipelineBuilder, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, TransportType transportType, ClientOptions options)
at Microsoft.Azure.Devices.Client.ClientFactory.CreateFromConnectionString(String connectionString, ClientOptions options)
at Microsoft.Azure.Devices.Client.DeviceClient.<>c__DisplayClass8_0.<CreateFromConnectionString>b__0()
at Microsoft.Azure.Devices.Client.DeviceClient.Create(Func`1 internalClientCreator)
at Microsoft.Azure.Devices.Client.DeviceClient.CreateFromConnectionString(String connectionString, ClientOptions options)
[..]

我播放了不同的httpclient实现，而没有任何积极的结果。而且，令人惊讶的是，它具有相同的呼叫板，并带有nsurlsessionhandler.set_sslprotocols

。 noreferrer”>

问题

为什么会丢弃此错误？固定？

Answer 1

我正在使用Visual Studio 2022用于Mac版本17.3 Preview 1 。在更新到Visual Studio 2022之后，用于Mac V17.3 Preview 1.1 以及.net Maui Workload，它都可以使用。

我让httpclient实现为nsurlsession。

我不确定它的确切原因为什么现在起作用，但是我认为使用预览产品时必定会发生这些问题。