windows-10-iot-core - UWP 应用程序中使用 Microsoft.Azure.Devices.Client 时出现异常

Question

当我尝试使用 https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-csharp-csharp-twin-getstarted 中提到的代码时在 UWP 应用程序中，等待 Client.GetTwinAsync()；抛出以下异常。我在两台不同的机器上试过但同样的错误，即使调用 OpenAsync 也会导致同样的异常。我正在尝试创建 UWP 应用程序，以便我可以将其部署到 IOT 设备上。

{System.IO.FileNotFoundException: Could not load file or assembly 'System.Net.Security, Version=4.0.1.2, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'System.Net.Security, Version=4.0.1.2, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
at Microsoft.Azure.Devices.Client.DeviceClient.<>c.b__74_2(Task t)
at System.Threading.Tasks.Task.Execute()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at AzureIoTSuiteUWPDevice.MainPage.d__34.MoveNext()}

Answer 1

我已经下载了您提供的解决方案。通过在解决方案属性中将目标的最低版本更改为 16299 可以解决此问题。可以引用here了解如何选择 UWP 版本。

Minimum Version. This sets the TargetPlatformMinVersion setting in your project file. It also determines the value of the TargetDeviceFamily@MinVersion attribute in your app package manifest. The value you choose specifies the minimum version of the UWP platform that your project can work with.

此外，您应该在 Capabilities 中选择 Private Networks(Client & Server) (Package.appxmanifest) 以允许您的应用程序访问 IoT 中心。

privateNetworkClientServer
On Windows, this provides access to a home or work network – the app can send information to or from your computer and other computers on the same network. On Windows Phone, provides the same access as internetClient or internetClientServer.