Vb.net Billing Software Source Code Jun 2026

The source code functions as a prototype but is currently in its present state due to security vulnerabilities (SQL Injection) and maintainability risks. A refactoring sprint is highly advised before adding new features.

Private Sub PrintInvoice() Dim printDoc As New Printing.PrintDocument() AddHandler printDoc.PrintPage, AddressOf PrintPageHandler Dim printDialog1 As New PrintDialog() printDialog1.Document = printDoc If printDialog1.ShowDialog() = DialogResult.OK Then printDoc.Print() End If End Sub vb.net billing software source code

| Module | Description | |--------|-------------| | | Add, edit, delete, search products (Code, Name, Unit, Price, GST%, HSN code). | | Customer/Party Master | Manage customer details, credit limits, and GSTIN numbers. | | Invoice/Bill Entry | Create new bills, add line items, auto-calculate totals, taxes, discounts. | | Print Invoice | Generate printable or PDF invoices with company logo and terms. | | Stock Management | Track inventory quantities, low stock alerts, and stock valuation. | | GST / Tax Reports | Show tax breakup (CGST, SGST, IGST) and generate GSTR-1 like summaries. | | Sales Report | View daily, monthly, or custom date range sales. | | Backup & Restore | Backup SQL Server or MS Access database with one click. | The source code functions as a prototype but

A professional billing tool requires more than just a "print" button. Key components include: | | Customer/Party Master | Manage customer details,

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

Most VB.NET billing source code examples use either (free, robust) or MS Access (portable, simple). Below is a normalized schema for a professional system.