Vb.net Billing Software Source Code Page

Public Function ExecuteNonQuery(ByVal query As String) As Integer Using conn As SqlConnection = getConnection() conn.Open() Using cmd As New SqlCommand(query, conn) Return cmd.ExecuteNonQuery() End Using End Using End Function End Module In frm_Billing.vb , a DataGridView acts as the cart. The user scans a barcode or selects a product, and it is added to the cart.

lblSubTotal.Text = subTotal.ToString("C") 'C = Currency format lblTax.Text = gstAmount.ToString("C") lblGrandTotal.Text = grandTotal.ToString("C") End Sub This is the most critical function. It must ensure that if the invoice master saves, the details save; otherwise, roll back. vb.net billing software source code

Private Sub CalculateTotal() Dim subTotal As Decimal = 0 For Each row As DataGridViewRow In dgvCart.Rows subTotal += Convert.ToDecimal(row.Cells("Total").Value) Next It must ensure that if the invoice master

'Header e.Graphics.DrawString("ABC Electronics", largeFont, Brushes.Black, leftMargin, yPos) yPos += 30 e.Graphics.DrawString("Invoice #: " & lblInvoiceNo.Text, font, Brushes.Black, leftMargin, yPos) yPos += 20 e.Graphics.DrawString("Date: " & DateTime.Now.ToShortDateString(), font, Brushes.Black, leftMargin, yPos) yPos += 30 e.Graphics.DrawString("Items:", font, Brushes.Black, leftMargin, yPos) yPos += 20 the details save