One of the main benefits of working with source code is the ability to modify it. These projects are primarily meant for and serve as excellent templates. You can download them for free, learn from them, and modify the source code to meet your specific business requirements. If you need to customize the code for your own project, you can use an editor like Visual Studio or Visual Studio Code .
: Tracks daily sales, tax collections, and stock alerts. Database Schema (SQL Server)
The VB.NET billing software source code appears to be well-structured and follows standard coding practices. The code is organized into logical modules, making it easier to navigate and modify. The software uses a Microsoft SQL Server database, which provides a robust and scalable data storage solution.
: DataGridView ( dgvInvoiceItems ) with columns: ID, Product Name, Unit Price, Qty, Subtotal .
What do you plan to use? (SQL Server, MySQL, SQLite) vbnet+billing+software+source+code
: Prevent data loss by configuring your application to generate a compressed SQL backup ( .bak file) automatically whenever the administrator closes the application.
This implementation uses System.Data.SQLite (available via NuGet). If you are using MS Access, simply swap SQLiteConnection for OleDbConnection . 1. Database Connection Class ( DbManager.vb )
Private Sub btnCheckout_Click(sender As Object, e As EventArgs) Handles btnCheckout.Click If dgvCart.Rows.Count = 0 Then MsgBox("Cart is empty!", MsgBoxStyle.Exclamation) Exit Sub End If Try db.OpenConnection() ' 1. Insert into Invoices Master Table Dim invQuery As String = "INSERT INTO Invoices (InvoiceNo, CustomerName, SubTotal, TaxAmount, GrandTotal) " & "VALUES (@InvNo, @CustName, @Sub, @Tax, @Grand); SELECT SCOPE_IDENTITY();" Dim cmdInv As New SqlCommand(invQuery, db.conn) cmdInv.Parameters.AddWithValue("@InvNo", txtInvoiceNo.Text) cmdInv.Parameters.AddWithValue("@CustName", If(txtCustomer.Text = "", "Walk-in Customer", txtCustomer.Text)) cmdInv.Parameters.AddWithValue("@Sub", Convert.ToDecimal(lblSubTotal.Text)) cmdInv.Parameters.AddWithValue("@Tax", Convert.ToDecimal(lblTax.Text)) cmdInv.Parameters.AddWithValue("@Grand", Convert.ToDecimal(lblGrandTotal.Text)) ' Get newly created auto-incremented Invoice ID Dim newInvoiceID As Integer = Convert.ToInt32(cmdInv.ExecuteScalar()) ' 2. Loop through cart items to save detail and update inventory levels For Each row As DataGridViewRow In dgvCart.Rows If Not row.IsNewRow Then ' Save invoice detail row Dim detailQuery As String = "INSERT INTO InvoiceDetails (InvoiceID, ProductID, UnitPrice, Quantity, TotalPrice) " & "VALUES (@InvID, @ProdID, @Price, @Qty, @Total)" Dim cmdDet As New SqlCommand(detailQuery, db.conn) cmdDet.Parameters.AddWithValue("@InvID", newInvoiceID) cmdDet.Parameters.AddWithValue("@ProdID", row.Cells("ProdID").Value) cmdDet.Parameters.AddWithValue("@Price", row.Cells("Price").Value) cmdDet.Parameters.AddWithValue("@Qty", row.Cells("Qty").Value) cmdDet.Parameters.AddWithValue("@Total", row.Cells("Total").Value) cmdDet.ExecuteNonQuery() ' Deduct Stock Quantity from inventory Dim stockQuery As String = "UPDATE Products SET StockQty = StockQty - @Qty WHERE ProductID = @ProdID" Dim cmdStock As New SqlCommand(stockQuery, db.conn) cmdStock.Parameters.AddWithValue("@Qty", row.Cells("Qty").Value) cmdStock.Parameters.AddWithValue("@ProdID", row.Cells("ProdID").Value) cmdStock.ExecuteNonQuery() End If Next MsgBox("Invoice Saved Successfully!", MsgBoxStyle.Information) ' Reset UI for next sale transaction dgvCart.Rows.Clear() GenerateInvoiceNumber() CalculateBillTotals() Catch ex As Exception MsgBox("Transaction Failed: " & ex.Message, MsgBoxStyle.Critical) Finally db.CloseConnection() End Try End Sub Use code with caution. 6. Enhancing Security and Extending the System
Billing software lives and dies by its reports. The source code should include an implementation of: One of the main benefits of working with
Developing desktop-based retail and enterprise solutions remains highly efficient using VB.NET and Windows Forms. This article provides a comprehensive guide to building a robust billing system from scratch, complete with database architecture, user interface design, and core source code components. Architecture of a VB.NET Billing System
Build a Powerful Billing Software in VB.NET – Full Source Code Insights
Imports System.Data.SqlClient Module dbConnection Public conn As New SqlConnection("Data Source=.;Initial Catalog=BillingDB;Integrated Security=True") Public Sub OpenConnection() If conn.State = ConnectionState.Closed Then conn.Open() End If End Sub Public Sub CloseConnection() If conn.State = ConnectionState.Open Then conn.Close() End If End Sub End Module Use code with caution. 2. Main Billing Interface ( frmBilling.vb )
Proactively structured custom invoice solutions give organizations granular operational agility that rigid, off-the-shelf software packages simply cannot replicate. If you need help expanding this source code, let me know: If you need to customize the code for
A comprehensive billing system built in VB.NET generally consists of the following modules and code structures: 1. Database Schema (MS SQL/MySQL) The backbone of the application. Key tables include: Users : Authentication and roles. Products/Items : Item ID, Name, Price, Stock Quantity. Customers : Customer details for invoicing.
-- 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 )
While the table above shows the unique focus of each project, a well-rounded billing system generally includes a core set of features that you'll find across most of these projects.