c# - 如何使用 DataContractSerializer 序列化 WCF 消息？

Question

我正在尝试使用 DataContractSerializer 序列化 WCF 消息以获取消息大小(不使用服务跟踪查看器)。以下是代码片段:

public void BeforeSendReply(ref Message reply, object correlationState)
        {
            byte[] bytes = null;
            var messageBuffer = reply.CreateBufferedCopy(Int32.MaxValue);
            var message = messageBuffer.CreateMessage();
            var dcs = new DataContractSerializer(typeof(Message));
            using (var ms = new MemoryStream())
            {
                dcs.WriteObject(ms, message);
                bytes = ms.ToArray();
                Console.WriteLine(String.Format("Message size = {0}", bytes.Count()));
            }
        }

这样做会引发以下异常:

Type 'System.ServiceModel.Channels.BodyWriterMessage' cannot be serialized. Cons ider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the typ e is a collection, consider marking it with the CollectionDataContractAttribute.

可以做什么？

Answer 1

Message 类不是数据协定类型或 Xml 序列化程序类型。 WCF特例吧。要找到长度，您的代码应该更像这样:

    public void BeforeSendReply(ref Message reply, object correlationState)
    {
        var messageBuffer = reply.CreateBufferedCopy(Int32.MaxValue);
        var message = messageBuffer.CreateMessage();

        using (var ms = new MemoryStream())
        {
            var xw = XmlWriter.Create(ms);
            message.WriteMessage(xw);
            Console.WriteLine(String.Format("Message size = {0}", ms.Length));
        }
    }