WCF:MessageContract句柄已序列化事件
如何使用MessageContract处理OnDeserialized事件 在收到消息后(但在执行方法之前),需要进行一些数据验证和转换 对于DataContract,它是通过声明属性解决的WCF:MessageContract句柄已序列化事件,wcf,xml-deserialization,messagecontract,Wcf,Xml Deserialization,Messagecontract,如何使用MessageContract处理OnDeserialized事件 在收到消息后(但在执行方法之前),需要进行一些数据验证和转换 对于DataContract,它是通过声明属性解决的 [ServiceContract] public interface IService1 { [OperationContract] string GetData(int value); [OperationContract]
[ServiceContract]
public interface IService1
{
[OperationContract]
string GetData(int value);
[OperationContract]
[MyValidationBeforeInvokeBehavior]
AddPatientRecordResponse AddPatientRecord(PatientRecord composite);
}
[MessageContract(IsWrapped = false, ProtectionLevel = ProtectionLevel.None)]
public class AddPatientRecordResponse
{
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public Guid recordID;
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string patientName;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string status;
}
[MessageContract(IsWrapped = false, ProtectionLevel = ProtectionLevel.None)]
public class PatientRecord
{
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public Guid recordID;
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string patientName;
//[MessageHeader(ProtectionLevel = ProtectionLevel.EncryptAndSign)]
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string SSN;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string comments;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string diagnosis;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string medicalHistory;
}
public class Service1 : IService1
{
public string GetData(int value)
{
return string.Format("You entered: {0}", value);
}
public AddPatientRecordResponse AddPatientRecord(PatientRecord patient)
{
var response = new AddPatientRecordResponse
{
patientName = patient.patientName,
recordID = patient.recordID,
status = "Sucess"
};
return response;
}
}
但对于MessageContract来说,它不起作用
有什么方法可以做到这一点吗?最好使用而不是序列化。特别是IoperationVoker
编辑
例如:
服务和消息定义如下。请注意新的MyValidationBeforeInvokeBehavior属性
[ServiceContract]
public interface IService1
{
[OperationContract]
string GetData(int value);
[OperationContract]
[MyValidationBeforeInvokeBehavior]
AddPatientRecordResponse AddPatientRecord(PatientRecord composite);
}
[MessageContract(IsWrapped = false, ProtectionLevel = ProtectionLevel.None)]
public class AddPatientRecordResponse
{
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public Guid recordID;
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string patientName;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string status;
}
[MessageContract(IsWrapped = false, ProtectionLevel = ProtectionLevel.None)]
public class PatientRecord
{
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public Guid recordID;
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string patientName;
//[MessageHeader(ProtectionLevel = ProtectionLevel.EncryptAndSign)]
[MessageHeader(ProtectionLevel = ProtectionLevel.None)]
public string SSN;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string comments;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string diagnosis;
[MessageBodyMember(ProtectionLevel = ProtectionLevel.None)]
public string medicalHistory;
}
public class Service1 : IService1
{
public string GetData(int value)
{
return string.Format("You entered: {0}", value);
}
public AddPatientRecordResponse AddPatientRecord(PatientRecord patient)
{
var response = new AddPatientRecordResponse
{
patientName = patient.patientName,
recordID = patient.recordID,
status = "Sucess"
};
return response;
}
}
钩住wcf的可扩展性
public class MyValidationBeforeInvokeBehavior : Attribute, IOperationBehavior
{
public void Validate(OperationDescription operationDescription)
{
}
public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation)
{
dispatchOperation.Invoker = new MyValidationBeforeInvoke(dispatchOperation.Invoker);
}
public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation)
{
}
public void AddBindingParameters(OperationDescription operationDescription, BindingParameterCollection bindingParameters)
{
}
}
自定义操作调用程序:
public class MyValidationBeforeInvoke : IOperationInvoker
{
private readonly IOperationInvoker _original;
public MyValidationBeforeInvoke(IOperationInvoker original)
{
_original = original;
}
public object[] AllocateInputs()
{
return _original.AllocateInputs();
}
public object Invoke(object instance, object[] inputs, out object[] outputs)
{
var validator = new ValidatePatientRecord((PatientRecord) inputs[0]);
if (validator.IsValid())
{
var ret = _original.Invoke(instance, inputs, out outputs);
return ret;
}
else
{
outputs = new object[] {};
var patientRecord = (PatientRecord) inputs[0];
var returnMessage = new AddPatientRecordResponse
{
patientName = patientRecord.patientName,
recordID = patientRecord.recordID,
status = "Validation Failed"
};
return returnMessage;
}
}
public IAsyncResult InvokeBegin(object instance, object[] inputs, AsyncCallback callback, object state)
{
return _original.InvokeBegin(instance, inputs, callback, state);
}
public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result)
{
return _original.InvokeEnd(instance, out outputs, result);
}
public bool IsSynchronous
{
get { return _original.IsSynchronous; }
}
}
本质上,我们永远不会调用服务调用,因为由于验证错误,它永远不会到达那里。我们还可以返回发生在客户身上的情况
验证类和客户端调用(用于完成):
客户:
class Program
{
static void Main(string[] args)
{
var patient = new PatientRecord { SSN = "123", recordID = Guid.NewGuid(), patientName = "Stack Overflow" };
var proxy = new ServiceReference1.Service1Client();
var result = proxy.AddPatientRecord(patient);
Console.WriteLine(result.status);
Console.ReadLine();
}
}
谢谢,Petar,但是序列化回调也是WCF扩展点的一部分。iOperationVoker似乎不适合它。我有基本MessageContract类(必须验证其逻辑)和几个具有派生MessageContracts的服务。MessageContract使用的是XmlSerializer,它不实现序列化回调。