Vb.net Billing Software Source Code _verified_

transaction.Commit() MessageBox.Show("Invoice #" & invoiceNo & " saved successfully.") ClearBillForm() Catch ex As Exception transaction.Rollback() MessageBox.Show("Failed: " & ex.Message) Finally CloseDB() End Try

Private Sub AddProductToCart(productID As Integer, qty As Integer) 'Fetch product details from database using productID Dim query As String = "SELECT ProductName, SellingPrice, GST_Percent FROM tbl_Products WHERE ProductID = " & productID Using conn As SqlConnection = getConnection() conn.Open() Using cmd As New SqlCommand(query, conn) Dim reader As SqlDataReader = cmd.ExecuteReader() If reader.Read() Then Dim productName As String = reader("ProductName").ToString() Dim price As Decimal = Convert.ToDecimal(reader("SellingPrice")) Dim gstPercent As Integer = Convert.ToInt32(reader("GST_Percent")) 'Add row to DataGridView (dgvCart) dgvCart.Rows.Add(productID, productName, qty, price, qty * price, gstPercent) CalculateTotal() 'Update subtotal, tax, grand total End If End Using End Using vb.net billing software source code

Open Visual Studio and create a new VB.NET Windows Forms App. transaction