Imports System.Data.SqlClient Module mod_DB Public connString As String = "Data Source=localhost\SQLEXPRESS;Initial Catalog=BillingDB;Integrated Security=True"
If you are a small retail shop with unique workflows (e.g., laundry billing, restaurant split-bill), VB.NET source code gives you freedom . If you need a standard retail POS, buy ready-made software. Conclusion The "vb.net billing software source code" is not just a collection of files; it is a blueprint for understanding transactional systems, database integrity, and UI/UX in desktop applications. By mastering the code patterns shown above—database transactions, DataGridView cart management, and dynamic printing—you can build a billing system that rivals commercial products. vb.net billing software source code
If you are searching for "," you are likely looking to do one of three things: build a custom solution for your business, learn how billing logic works under the hood, or modify an open-source project to fit specific needs. Imports System
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 End Sub DataGridView cart management