WCF自定义异常

-------------interface----------------------

  /// <summary>
    /// 租赁合同管理
    /// </summary>
    [ServiceContract]
    public interface IRental
    {
        [OperationContract]
        [FaultContract(typeof(RentalRegistFault))]
        string RegisterCarRental(RentalRegistraction rentalRegistraction);//注册一个租赁合同
        [OperationContract]
        [FaultContract(typeof(RentalRegistFault))]
        void RegisterCarRentalAsPaid(string rentalID);//标记租赁合同已付款
        [OperationContract]
        [FaultContract(typeof(RentalRegistFault))]
        void StartCarRental(string rentalID);//在某个地点为某个合同准备好汽车
        [OperationContract]
        [FaultContract(typeof(RentalRegistFault))]
        void StopCarRental(string rentalID);//车辆将指定的位置还给公司
        [OperationContract]
        [FaultContract(typeof(RentalRegistFault))]
        RentalRegistraction GetRentalRegsitration(string rentalID);//获取某个合同的全部数据
    }

---------------------RentalRegistFault--------------------------

   [DataContract]
    public class RentalRegistFault
    {
        [DataMember]
        public string FaultDescription { get; set; }
        [DataMember]
        public int FaultID { get; set; }
    }

------------------Service_Imp-------------------------------

 public class RentalImplementation:IRental
    {
        #region IRental 成员

        public string RegisterCarRental(RentalRegistraction rentalRegistraction)
        {
            if (rentalRegistraction == null)
            {
                RentalRegistFault fault = new RentalRegistFault();
                fault.FaultID = 1;
                fault.FaultDescription = "传递的参数为空";
                throw new FaultException<RentalRegistFault>(fault,"传递的参数引用为空");
            }

            using (DataClassesRentalDataContext context = new DataClassesRentalDataContext())
            {
                Rental rental = new Rental();
                rental.CarID = rentalRegistraction.CarID;
                rental.CustomerID = rentalRegistraction.CustomerID;
                rental.DropOffLocation = rentalRegistraction.DropOffLocation;

                context.Rental.InsertOnSubmit(rental);
                context.SubmitChanges();
            }
            return "ok";

        }

----------------------------Client-------------------------------------

private void button1_Click(object sender, EventArgs e)
        {
            CarRentalPrxoxy proxy = new CarRentalPrxoxy();

            RentalRegistraction registraction = new RentalRegistraction();
            registraction.CarID = "JF00000";
            registraction.Comments = "备注";
            registraction.CustomerID = 1;
            registraction.DropOffDateTime = DateTime.Now;
            registraction.DropOffLocation = -1;

            string reult = "";

            try
            {
                reult = proxy.RegisterCarRental(null);
            }
            catch (FaultException<RentalInterface.RentalRegistFault> rentalRegistFaultex)
            {
                RentalRegistFault fault = rentalRegistFaultex.Detail;
                MessageBox.Show(rentalRegistFaultex.Message + " "+ fault.FaultDescription+" " + fault.FaultID);
                return;
            }
            catch (FaultException ex)
            {
                MessageBox.Show(ex.StackTrace);
                return;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.StackTrace);
                return;

            }

            MessageBox.Show(reult);
        }

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注意：FaultException需要引入System.ServiceModel.dll文件