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);    }