public static ModelInventoryContract getLatestContract()
        {
            ModelInventoryContract model;
            int intId = DalInventoryContract.getLatestContractId();

            if (intId > 0)
            {
                model = getById(intId);
            }
            else
            {
                model          = new ModelInventoryContract();
                model.time_end = Convert.ToDateTime("2019-01-01 00:00:00");
            }
            return(model);
        }
 public static DataTable getPage(int intPage, int intPageSize)
 {
     return(DalInventoryContract.getPage(intPage, intPageSize));
 }
 public static int getRecordsAmount()
 {
     return(DalInventoryContract.getRecordsAmount());
 }
 public static DataTable getAll()
 {
     return(DalInventoryContract.getAll());
 }
 public static ModelInventoryContract getById(int intId)
 {
     return(DalInventoryContract.getById(intId));
 }
 public static void update(ModelInventoryContract model)
 {
     DalInventoryContract.update(model);
 }
 public static void deleteById(int intId)
 {
     DalInventoryContract.deleteById(intId);
 }
 public static int add(ModelInventoryContract model)
 {
     return(DalInventoryContract.add(model));
 }