Question

我尝试使用Microsoft的Serivce Bus Brokered Message API，并且在尝试使用派生类型时遇到反序列化问题。看起来代码不能识别已知类型，并且在序列化这些类型并在其他服务之间返回它时没有问题。有什么我想念的吗？我已经经历了大量的SO帖子，似乎没有任何工作。

这是消息结构：

[DataContract]
[KnownType(typeof(ActivityBus))]
public class BaseBusType
{
    [DataMember]
    public int Id { get; set; }
}

[DataContract]
public class ActivityBus : BaseBusType { }

到目前为止，我已尝试过这些选项：

// In the sending function
var brokeredMessage = new BrokeredMessage(reader.ReadToEnd());
topicClient.Send(obj);

// In the receiving function
List<Type> knownTypes = new List<Type>() { typeof(ActivityBus) };
var serializer = new DataContractSerializer(typeof(BaseBusType), knownTypes); // listed knowntypes for brevity
var messageBody = message.GetBody<BaseBusType>(serializer);

此外：

// In the sending function
using (MemoryStream memoryStream = new MemoryStream())
using (StreamReader reader = new StreamReader(memoryStream))
{
    DataContractSerializer serializer = new DataContractSerializer(typeof(T));
    serializer.WriteObject(memoryStream, data);
    memoryStream.Position = 0;

    var brokeredMessage = new BrokeredMessage(reader.ReadToEnd());
    topicClient.Send(brokeredMessage);
}

// In the receiving function
using (Stream stream = new MemoryStream())
{
    var str = brokeredMessage.GetBody<string>();

    byte[] data = System.Text.Encoding.UTF8.GetBytes(str);
    stream.Write(data, 0, data.Length);
    stream.Position = 0;
    List<Type> knownTypes = new List<Type>() { typeof(Activitybus) };
    var deserializer = new DataContractSerializer(typeof(BaseBusType), knownTypes);
    var reader = XmlReader.Create(new StringReader(str));
    var obj = deserializer.ReadObject(reader);
    return (T)obj;
}

对衍生类型进行反序列化导致＆＃34;期待元素＆＃34;错误

0 个答案: