private List <Entities.SubContractorDataItem> GetReadyToInvoiceForDates()
        {
            int identityID = 0;

            int.TryParse(cboSubContractor.SelectedValue, out identityID);

            // If all business types are selected then pass down an empty list - the stored procedure will then not filter on business type which will result in better performance
            var businessTypeIDs = chkBusinessType.AllBusinessTypesSelected ? Enumerable.Empty <int>() : chkBusinessType.SelectedBusinessTypeIDs;

            using (Facade.IJobSubContractor facJobSubContractor = new Facade.Job())
            {
                return(facJobSubContractor.GetJobSubContractorsReadyToInvoice(rdiStartDate.SelectedDate, rdiEndDate.SelectedDate, identityID, businessTypeIDs));
            }
        }