Vb.net Billing Software Source Code !!exclusive!! Jun 2026

Public Sub CloseDB() If conn.State = ConnectionState.Open Then conn.Close() End If End Sub

-- 1. Products Table CREATE TABLE Products ( ProductID INT PRIMARY KEY IDENTITY(1) NOT NULL, ProductName VARCHAR(100) NOT NULL, Price DECIMAL(18, 2) NOT NULL, StockQuantity INT NOT NULL ); -- 2. Invoices Table CREATE TABLE Invoices ( InvoiceID INT PRIMARY KEY IDENTITY(1) NOT NULL, InvoiceDate DATETIME DEFAULT GETDATE() NOT NULL, CustomerName VARCHAR(100) NULL, TotalAmount DECIMAL(18, 2) NOT NULL, TaxAmount DECIMAL(18, 2) NOT NULL, GrandTotal DECIMAL(18, 2) NOT NULL ); -- 3. Invoice Items Table (Transaction Details) CREATE TABLE InvoiceItems ( ItemID INT PRIMARY KEY IDENTITY(1) NOT NULL, InvoiceID INT FOREIGN KEY REFERENCES Invoices(InvoiceID) NOT NULL, ProductID INT FOREIGN KEY REFERENCES Products(ProductID) NOT NULL, Quantity INT NOT NULL, UnitPrice DECIMAL(18, 2) NOT NULL, SubTotal DECIMAL(18, 2) NOT NULL ); Use code with caution. 💻 Complete VB.NET Billing Software Source Code

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: Bind the txtProductID.TextChanged or KeyPress events to match barcode lookup sequences, removing manual typing dependencies.

This is a working billing system that you can expand based on your specific requirements! Public Sub CloseDB() If conn

Public Class DBConnection Private Shared connectionString As String = "Data Source=localhost;Initial Catalog=BillingSystem;Integrated Security=True" Public Shared conn As SqlConnection = New SqlConnection(connectionString)

-- 2. Customer table CREATE TABLE tbl_Customer ( CustomerID INT PRIMARY KEY IDENTITY(1,1), CustomerName NVARCHAR(150), GSTIN NVARCHAR(15), Address NVARCHAR(500), Mobile NVARCHAR(15) ); : Bind the txtProductID

Imports System.Data.OleDb Imports System.Data.SqlClient