Hutility

public string Import(IEnumerable<InvoiceLine> lines)
{
	// TODO: To increase efficiency, comment out any unused DB links.
	using (HuAPConnection Connection = new HuAPConnection())
	using (HuView APIBC = Connection.GetView("AP0020"))
	using (HuView APIBH = Connection.GetView("AP0021"))
	using (HuView APIBD = Connection.GetView("AP0022"))
	using (HuView APIBS = Connection.GetView("AP0023"))
	using (HuView APIBHO = Connection.GetView("AP0402"))
	using (HuView APIBDO = Connection.GetView("AP0401"))
	{
		APIBC.Compose(APIBH);
		APIBH.Compose(APIBC, APIBD, APIBS, APIBHO);
		APIBD.Compose(APIBH, APIBC, APIBDO);
		APIBS.Compose(APIBH);
		APIBHO.Compose(APIBH);
		APIBDO.Compose(APIBD);
		APIBC.Browse("((BTCHSTTS = 1) OR (BTCHSTTS = 7))");
		using (HuView APIVPT = Connection.GetView("AP0039"))
		{
			APIBC.RecordCreate(1);
			APIBC["PROCESSCMD"] = "1";  // Process Command Code
			APIBC.Process();
			APIBC.Read();
			APIBC["BTCHDESC"] = "Generated invoice batch";
			APIBC.Update();

			// Group invoices by vendor num and doc num
			foreach (IGrouping<string, InvoiceLine> invoice in lines.GroupBy(line => line.VendorNumber + " - " + line.DocuementNumber))
			{
				APIBH.RecordCreate(2);
				APIBD.Cancel();
				APIBH["IDVEND"] = invoice.First().VendorNumber;  // Vendor Number
				APIBH["PROCESSCMD"] = "7";  // Process Command Code
				APIBH.Process();
				APIBH["PROCESSCMD"] = "4";  // Process Command Code
				APIBH.Process();
				APIBH["IDINVC"] = invoice.First().DocuementNumber;  // Document Number
				APIBH["DATEINVC"] = invoice.First().DocumentDate;
				APIBH["DATEBUS"] = invoice.First().PostingDate;

				// Clear default detail lines - we only want lines based on import file
				while (APIBD.Fetch())
				{
					APIBD.Delete();
				}

				foreach (InvoiceLine invoiceLine in invoice)
				{
					APIBD.RecordClear();
					APIBD.RecordCreate(0);
					APIBD["PROCESSCMD"] = "0";  // Process Command Code
					APIBD.Process();
					APIBD["IDGLACCT"] = invoiceLine.Account;  // G/L Account
					APIBD["AMTDIST"] = invoiceLine.Amount;  // Distributed Amount
					APIBD.Insert();
				}

				APIBH["AMTGROSTOT"] = -(decimal)APIBH["AMTUNDISTR"];  // Document Total Including Tax
				APIBH.Insert();
			}
		}
		return APIBC["CNTBTCH"].ToString();
	}
}