通过CreateOrUpdateIndividualEnrollmentAsync与IoT DPS更新设备时出错

Question

使用以下代码更新已注册IoT DPS的现有设备时，会发生以下错误：

  

已执行“ MyFunction”（失败，Id = xxx）        System.Private.CoreLib：执行功能：MyFunction时发生异常。 Microsoft.Azure.Devices.Provisioning.Service：冲突：

     

{“ errorCode”：409201，“ trackingId”：“ xxx”，“ message”：“已注册   存在。“，” timestampUtc“：” 2019-08-07T16：27：23.3403783Z“}。

Microsoft.Azure.Devices.Provisioning.Service errorCode 409201 "Enrollment already exists."

private static async Task UpdateIndividualEnrollmentSymmetricKeyAsync()
            {
    var regId = GetRegistrationId("1", APP_NAME);
    var symmKey = GenerateSymmetricalKey(regId, _PROVISIONING_SHARED_KEY);

    Attestation attestation = new SymmetricKeyAttestation(symmKey, symmKey);
    var enrollment = new IndividualEnrollment(regId, attestation);

   //There are other properties, ProvisioningStatus below is only updated.
    enrollment.ProvisioningStatus = ProvisioningStatus.Enabled;

     //error occurred
    IndividualEnrollment enrollmentResult = await _provisioningServiceClient.CreateOrUpdateIndividualEnrollmentAsync(enrollment);

    }

Answer 1

对此sample进行了解，了解如何更新现有的个人注册：

您应该先获取现有的个人注册，然后再进行更新，然后调用 CreateOrUpdateIndividualEnrollmentAsync