使用BrokeredMessage从Azure Service Bus队列（v1）反序列化强类型对象

Question

无论出于何种原因，我似乎都无法弄清楚如何将对象从队列中拉出并反序列化为放置在其中的对象（ AccountEventDTO ）。

Azure函数成功将对象放入队列：

[FunctionName("AccountCreatedHook")]
public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequestMessage req,
    TraceWriter log, [ServiceBus("topic-name", Connection = "BusConnectionString", EntityType = Microsoft.Azure.WebJobs.ServiceBus.EntityType.Topic)] IAsyncCollector<BrokeredMessage> accountCreatedTopic)
{
    var accountEvent = await req.Content.ReadAsAsync<AccountEventDTO>();

    if (accountEvent != null && accountEvent.Name != null)
    {
        // Serialization
        var bytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(accountEvent));
        var memoryStream = new MemoryStream(bytes, writable: false);
        var message = new BrokeredMessage(memoryStream) { SessionId = Guid.NewGuid().ToString() };

        await accountCreatedTopic.AddAsync(message);
        return req.CreateResponse(HttpStatusCode.OK, "Account successfully added to topic.");
    }

    return req.CreateResponse(HttpStatusCode.BadRequest, "Account was not formed well.");
}

Azure函数从队列中拉出对象：

[FunctionName("AccountCreatedSubscriber")]
public static void Run([ServiceBusTrigger("topic-name", "license-keys", Connection = "BusConnectionString")]BrokeredMessage accountEvent, ILogger log)
{
    // ERROR on this line during deserialization
    var account = accountEvent.GetBody<AccountEventDTO>();

    var accountAddedEvent = Mapper.Map<AccountEventDTO, AccountAddedEvent>(account);
    _accountHandler.Handle(accountAddedEvent);
    GenericLogger.AccountLogging(log, accountAddedEvent);
}

错误消息：

AccountEventDTO：

public class AccountEventDTO : IAccountEvent
{
    public string Name { get; set; }
    public string SugarId { get; set; }
    public string AccountSubTypeRaw { get; set; }
    public AccountType AccountType { get; set; } = AccountType.Customer;
    public AccountSubType? AccountSubType { get; set; } = null;
    public string Phone { get; set; }
    public string PhoneAlternate { get; set; }
    public string BillingAddressCity { get; set; }
    public string BillingAddressCountry { get; set; }
    public string BillingAddressPostalCode { get; set; }
    public string BillingAddressState { get; set; }
    public string BillingAddressStreet { get; set; }
    public string ShippingAddressCity { get; set; }
    public string ShippingAddressCountry { get; set; }
    public string ShippingAddressPostalCode { get; set; }
    public string ShippingAddressState { get; set; }
    public string ShippingAddressStreet { get; set; }
    public string Website { get; set; }
}

Answer 1

您正在使用BrokeredMessage（。NET的旧Azure Service Bus客户端，WindowsAzure.ServiceBus）。当消息作为内存流发送时，必须使用相同的方法进行接收和反序列化。如果构造GetBody<T>并传入类型BrokeredMessage的对象，则T将起作用。

注意：下一代客户端（Microsoft.Azure.ServiceBus）仅与字节数组（旧客户端的内存流）一起工作。如果这是一个新项目，建议坚持使用该方法而不是序列化类型。有关更多信息，请参见GitHub问题here。

Answer 2

最终通过更改我在发送方对消息进行序列化的方式以及在接收方将其拉低的方式来解决此问题。

发送序列号：

var jsonString = JsonConvert.SerializeObject(accountEvent);
var message = new BrokeredMessage(jsonString);
message.SessionId = Guid.NewGuid().ToString();
message.ContentType = "application/json";

接收反序列化：

var content = accountEvent.GetBody<string>();
var account = JsonConvert.DeserializeObject<AccountEventDTO>(content);