Question

我有一个要求，我必须使用System.Object作为WCF中的参数。因为它不可序列化，所以我收到消息，因为它不支持操作，因为它使用System.Object。解决这个问题的任何方法。

Answer 1

通过网络发送消息时，WCF默认只会序列化足以获取消息的内容，即合同成员。如果您的消息将“对象”作为参数，则需要使用类型信息通过线路发送额外信息。如果在客户端和服务器上使用相同的程序集，则可以在服务器（和客户端）中使用NetDataContractSerializer（而不是默认的DataContractSerializer），它们将能够任意交换对象，如下面的代码所示。但是，正如@MarcGravell所提到的，这可能不是WCF的最佳用法......

启用NetDataContractSerializer的代码：

public class Post_8b2c7ad7_b1c3_410b_b907_f25cee637110
{
    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public override string ToString()
        {
            return string.Format("Person[Name={0},Age={1}]", Name, Age);
        }
    }
    [ServiceContract]
    public interface ITest
    {
        [OperationContract]
        object Echo(object obj);
    }
    public class Service : ITest
    {
        public object Echo(object obj)
        {
            return obj;
        }
    }
    public class ReplaceSerializerOperationBehavior : DataContractSerializerOperationBehavior
    {
        public ReplaceSerializerOperationBehavior(OperationDescription operation)
            : base(operation)
        {
        }
        public override XmlObjectSerializer CreateSerializer(Type type, string name, string ns, IList<Type> knownTypes)
        {
            return new NetDataContractSerializer(name, ns);
        }
        public override XmlObjectSerializer CreateSerializer(Type type, XmlDictionaryString name, XmlDictionaryString ns, IList<Type> knownTypes)
        {
            return new NetDataContractSerializer(name, ns);
        }
        public static void ReplaceSerializer(ServiceEndpoint endpoint)
        {
            foreach (var operation in endpoint.Contract.Operations)
            {
                for (int i = 0; i < operation.Behaviors.Count; i++)
                {
                    if (operation.Behaviors[i] is DataContractSerializerOperationBehavior)
                    {
                        operation.Behaviors[i] = new ReplaceSerializerOperationBehavior(operation);
                        break;
                    }
                }
            }
        }
    }
    public static void Test()
    {
        string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
        ServiceHost host = new ServiceHost(typeof(Service), new Uri(baseAddress));
        var endpoint = host.AddServiceEndpoint(typeof(ITest), new BasicHttpBinding(), "");
        ReplaceSerializerOperationBehavior.ReplaceSerializer(endpoint);
        host.Open();
        Console.WriteLine("Host opened");

        ChannelFactory<ITest> factory = new ChannelFactory<ITest>(new BasicHttpBinding(), new EndpointAddress(baseAddress));
        ReplaceSerializerOperationBehavior.ReplaceSerializer(factory.Endpoint);
        ITest proxy = factory.CreateChannel();
        Console.WriteLine(proxy.Echo("Hello"));
        Console.WriteLine(proxy.Echo(123.456));
        Console.WriteLine(proxy.Echo(new Uri("http://tempuri.org")));
        Console.WriteLine(proxy.Echo(new Person { Name = "John Doe", Age = 33 }));

        ((IClientChannel)proxy).Close();
        factory.Close();

        Console.Write("Press ENTER to close the host");
        Console.ReadLine();
        host.Close();
    }
}

WCF System.Object序列化

1 个答案: