Vbnet+billing+software+source+code //free\\ Jun 2026

-- 1. Inventory Management CREATE TABLE Products ( ProductID INTEGER PRIMARY KEY AUTOINCREMENT, ProductName VARCHAR(100) NOT NULL, Price DECIMAL(10, 2) NOT NULL, StockQuantity INT NOT NULL ); -- 2. Master Invoice Record CREATE TABLE Invoices ( InvoiceID INTEGER PRIMARY KEY AUTOINCREMENT, InvoiceDate DATETIME DEFAULT CURRENT_TIMESTAMP, CustomerName VARCHAR(100), GrandTotal DECIMAL(10, 2) ); -- 3. Line Items (Transaction Details) CREATE TABLE InvoiceDetails ( DetailID INTEGER PRIMARY KEY AUTOINCREMENT, InvoiceID INT, ProductID INT, Quantity INT, UnitPrice DECIMAL(10, 2), SubTotal DECIMAL(10, 2), FOREIGN KEY(InvoiceID) REFERENCES Invoices(InvoiceID), FOREIGN KEY(ProductID) REFERENCES Products(ProductID) ); Use code with caution. 🛠️ Setting Up the Windows Forms UI

| Project Name | Database | Key Modules | Best Suited For | |---|---|---|---| | Super-market Billing System | MS Access (OLEDB) | Billing, Stock Management, Authentication | Grocery stores, small retail | | Store Billing System (POS) | SQL | POS, Sales transactions | Retail shops of any size | | Food POS System | MS Access 2019 | Customer Management, Order Taking, Payment, VAT, Discounts | Restaurants, food businesses | | Automated Beer Parlour Billing | MS Access 2003 | Product Management, POS, Sales Receipts, User Management | Bars, pubs, beverage retailers | | Pub Billing System | MS Access | Product Inventory, POS, Sales Records, User Management | Pubs, bars | | Complete Billing Software with Inventory | SQL Server 2008 R2 | Extensive: Inventory, Invoicing, Quotations, SMS, Comprehensive Reports (Profit/Loss, Stock, Ledgers), Database Tools | Medium to large businesses needing robust accounting | | Enrollment with Billing System | MySQL | Student Management, Enrollment, Payments, Receipts, Academic Management | Schools, educational institutions | | Simple Student Information and Billing | SQL Server | Student Information, Fee Management, Payment Records | Small schools, tuition centers |

The complete source code behind frmBilling.vb manages calculations, line-item additions, inventory checks, and final multi-table database insertions inside a transaction block.

Public Function ExecuteNonQuery(ByVal query As String, Optional ByVal parameters As SqlParameter() = Nothing) As Integer Using conn As New SqlConnection(ConnectionString) Using cmd As New SqlCommand(query, conn) If parameters IsNot Nothing Then cmd.Parameters.AddRange(parameters) conn.Open() Return cmd.ExecuteNonQuery() End Using End Using End Function vbnet+billing+software+source+code

For high performance apps, eliminate inline SQL statements by mapping database contexts dynamically using Object-Relational Mapping Frameworks (Entity Framework Core). 3. Asynchronous Execution Pattern

A robust production billing application requires a standard set of relational features to ensure data integrity and seamless operations:

-- Create Database CREATE DATABASE BillingDB; GO USE BillingDB; GO -- 1. Products Table CREATE TABLE Products ( ProductID INT IDENTITY(1,1) PRIMARY KEY, ProductCode VARCHAR(50) UNIQUE NOT NULL, ProductName VARCHAR(100) NOT NULL, UnitPrice DECIMAL(18,2) NOT NULL, StockQty INT NOT NULL ); -- 2. Invoice Master Table CREATE TABLE Invoices ( InvoiceID INT IDENTITY(1,1) PRIMARY KEY, InvoiceNo VARCHAR(50) UNIQUE NOT NULL, InvoiceDate DATETIME DEFAULT GETDATE(), SubTotal DECIMAL(18,2) NOT NULL, TaxAmount DECIMAL(18,2) NOT NULL, GrandTotal DECIMAL(18,2) NOT NULL, CashierName VARCHAR(50) ); -- 3. Invoice Details Table CREATE TABLE InvoiceDetails ( DetailID INT IDENTITY(1,1) PRIMARY KEY, InvoiceID INT FOREIGN KEY REFERENCES Invoices(InvoiceID), ProductID INT FOREIGN KEY REFERENCES Products(ProductID), Quantity INT NOT NULL, Rate DECIMAL(18,2) NOT NULL, TotalAmount DECIMAL(18,2) NOT NULL ); Use code with caution. Core VB.NET Implementation Source Code 1. Database Connection Module ( dbConnection.vb ) and stock levels.

Generate professional receipts and invoices that can be printed or exported to formats like Excel , Word , or PDF using tools like Crystal Reports .

If two billing computers sell the last remaining item unit simultaneously, your inventory numbers can slip into negative balances. Introduce a database restriction block or a business condition code to check inventory metrics before finalizing transactions:

Ensure that whenever an execution writes to Invoices , its child loops processing InvoiceItems are bound within an explicit SqlTransaction block. This keeps your data clean if a crash occurs mid-write. .Quantity = qty

Storing contact details and credit history.

Dim newItem As New BillItem With .ProductName = product, .Quantity = qty, .Price = price, .Total = total

Exporting invoices to PDF or printing via Crystal Reports. The Core Logic: VB.NET Billing Source Code

CRUD operations for items, pricing, and stock levels.