转 使用IParameterInspector, IOperationBehavior,Attribute(参数检查器、操作行为接口和标签)扩展WCF操作行为

 public class EntryIdInspector : IParameterInspector
    {
        public int intParamIndex
        {
            get;
            set;
        }
        string EntryIdFormat = @"\d{17}";

        public EntryIdInspector(): this(0){ }

        public EntryIdInspector(int intParamIndex)
        {
            this.intParamIndex = intParamIndex;
        }

        public object BeforeCall(string operationName, object[] inputs)
        {
            string strEntryId = inputs[this.intParamIndex] as string;
            if (!Regex.IsMatch(strEntryId, this.EntryIdFormat, RegexOptions.None))
            {

                MessageQueue mq = new MessageQueue(@".\private$\msgqueue");
                mq.Send( "Parameter is not valid when call " + operationName + " at " + DateTime.Now.ToLongDateString());
                throw new FaultException(
                    "Invalid Entry ID format. Required format: ##################");
            }
            return null;

        }
        public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState)
        {
            MessageQueue mq = new MessageQueue(@".\private$\msgqueue");
            string strResult = returnValue.ToString();
            mq.Send("Client call " + operationName + ":" + strResult + " at " + DateTime.Now.ToLongDateString());

        }
    }

　　

 public class EntryIdValidation : Attribute, IOperationBehavior
    {
        #region IOperationBehavior Members

        public void AddBindingParameters(OperationDescription operationDescription,
            BindingParameterCollection bindingParameters)
        {
        }

        public void ApplyClientBehavior(OperationDescription operationDescription,
            ClientOperation clientOperation)
        {
            EntryIdInspector EntryIdInspector = new EntryIdInspector();
            clientOperation.ParameterInspectors.Add(EntryIdInspector);
        }

        public void ApplyDispatchBehavior(OperationDescription operationDescription,
            DispatchOperation dispatchOperation)
        {
            EntryIdInspector EntryIdInspector = new EntryIdInspector();
            dispatchOperation.ParameterInspectors.Add(EntryIdInspector);
        }

        public void Validate(OperationDescription operationDescription)
        {
        }

        #endregion
    }

　　在操作Operation上加入标签attribute，在操作契约中加上标签[EntryIdValidation]

    [ServiceContract]
    public interface IRelSrvContract
    {
        [EntryIdValidation]
        [OperationContract]
        bool Rel(string strEntryID);
    }