Question

注册表抛出异常ArgumentNull的AddDeviceAsync方法。参数，registryManager和输出参数notjing为null但它仍然抛出异常。

异常：{＆＃34;消息＆＃34;：＆＃34; ErrorCode：ArgumentNull; BadRequest＆＃34;，＆＃34; ExceptionMessage＆＃34;：＆＃34;跟踪ID：adf7e83e7db046969086702500cbe73b-G：2- TimeStamp：03/21/2018 14:09:50＆＃34;}方法：ProjectXXX.NTB.FN.DeviceRegistration.IdentityCreationService.CreateDeviceIdentity（）描述：意外异常

它是否与Microsoft.Azure.Devices库有关？

代码

HttpModule

堆栈跟踪 System.ArgumentException：在Microsoft.Azure.Devices.HttpClientHelper + d__36.MoveNext（Microsoft.Azure.Devices，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = 31bf3856ad364e35）在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（mscorlib，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089）在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（mscorlib，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089）在Microsoft.Azure.Devices.HttpClientHelper + d__12 RegistryManager registryManager = null; void Initialize() { registryManager = RegistryManager.CreateFromConnectionString(AppSetting.IoTHubConnectionString); } public async Task<string> CreateDeviceIdentity(string deviceId, string deviceKey) { Device device = new Device(deviceId); Device newdevice = new Device(); Exception exception = null; bool bExceptionHasOccured = false; string token = string.Empty; string primarySasToken = Base64Encode(deviceKey); string secondarySasToken = Base64Encode($"{deviceId}-{deviceId}"); device.Authentication = new AuthenticationMechanism { SymmetricKey = new SymmetricKey { PrimaryKey = primarySasToken, SecondaryKey = secondarySasToken } }; try { newdevice = await registryManager.AddDeviceAsync(device); break; } catch (DeviceAlreadyExistsException) { token = GetDeviceToken(deviceId); break; } catch (IotHubThrottledException e) { } catch (SocketException e) { } catch (Exception e) { } token = newdevice.Authentication.SymmetricKey.PrimaryKey; return token; } 1.GetResult（mscorlib，Version = 4.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089）在ProjectXXX.NTB.FN.DeviceRegistration.IdentityCreationService + d__6.MoveNext（ProjectXXX.NTB.FN.DeviceRegistration，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = nullProjectXXX.NTB.FN.DeviceRegistration，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = null：D：\ ProjectXXX \ ProjectXXX.NTB \ ProjectXXX.NTB \ DeviceRegistrationLib \ ProjectXXX.NTB.FN.DeviceRegistration \ IdentityCreationService.csProjectXXX.NTB.FN.DeviceRegistration，Version = 1.0.0.0，Culture = neutral， PublicKeyToken = null：122）

Answer 1

有效的SymmetricKey必须是Base64编码的字符串，长度在16到64个字节之间。

我不知道你的deviceKey是什么类型的。我使用GUID并使用以下代码块进行测试，并且可以成功创建设备。

public static async Task<string> CreateDeviceIdentity(string deviceId)
    {
        Device device = new Device(deviceId);
        Device newdevice = new Device();

        string token = string.Empty;

        var primaryKey = Guid.NewGuid();
        var secondaryKey = Guid.NewGuid();

        byte[] bytes = Encoding.UTF8.GetBytes(primaryKey.ToString());
        string base64PrimaryKey = Convert.ToBase64String(bytes);

        bytes = Encoding.UTF8.GetBytes(secondaryKey.ToString());
        string base64SecondaryKey = Convert.ToBase64String(bytes);

        try
        {

            device.Authentication = new AuthenticationMechanism
            {
                SymmetricKey = new SymmetricKey
                {
                    PrimaryKey = base64PrimaryKey,
                    SecondaryKey = base64SecondaryKey
                }
            };

            newdevice = await registryManager.AddDeviceAsync(device);
        }
        catch (Exception ex)
        {

        }

        token = newdevice.Authentication.SymmetricKey.PrimaryKey;
        return token;
    }

Answer 2

通过将Microsoft.Azure.Devices从1.5.1降级到1.3.2可以正常工作

Answer 3

当我将Microsoft.Azure.Devices从1.5.1降级到1.3.2

时，它有效

Azure IoThub - 类RegistryManager - 方法AddDeviceAsync（device）抛出ErrorCode：ArgumentNull; BadRequest

3 个答案: