public async Task <int> Create(BookingOrder model)
{
int latestSN = this.DbSet
.Where(d => d.SectionId.Equals(model.SectionId) && d.BuyerId.Equals(model.BuyerId) && d.BookingDate.Year.Equals(model.BookingDate.Year))
.DefaultIfEmpty()
.Max(d => d.SerialNumber);
model.SerialNumber = latestSN != 0 ? latestSN + 1 : 1;
model.Code = String.Format("{0}-{1}-{2:D2}{3}", model.SectionCode, model.BuyerCode, model.BookingDate.Year, model.SerialNumber);
BookingOrderLogic.CreateModel(model);
return(await DbContext.SaveChangesAsync());
}
