

-- Create the Database CREATE DATABASE BillingDB; GO USE BillingDB; GO -- 1. Products Table CREATE TABLE Products ( ProductID INT IDENTITY(1,1) PRIMARY KEY, ProductName VARCHAR(100) NOT NULL, Price DECIMAL(18,2) NOT NULL, StockQty INT NOT NULL ); -- 2. Invoices Master Table CREATE TABLE Invoices ( InvoiceID INT IDENTITY(1,1) PRIMARY KEY, InvoiceDate DATETIME DEFAULT GETDATE(), CustomerName VARCHAR(100) NOT NULL, SubTotal DECIMAL(18,2) NOT NULL, TaxAmount DECIMAL(18,2) NOT NULL, Discount DECIMAL(18,2) NOT NULL, GrandTotal DECIMAL(18,2) NOT NULL ); -- 3. Invoice Items Transaction Table CREATE TABLE InvoiceDetails ( DetailID INT IDENTITY(1,1) PRIMARY KEY, InvoiceID INT FOREIGN KEY REFERENCES Invoices(InvoiceID) ON DELETE CASCADE, ProductID INT FOREIGN KEY REFERENCES Products(ProductID), Price DECIMAL(18,2) NOT NULL, Quantity INT NOT NULL, Total DECIMAL(18,2) NOT NULL ); Use code with caution. 2. User Interface Design (WinForms)
| Project Name | Description | Technology Stack | Source | | :--- | :--- | :--- | :--- | | | A desktop software for billing purposes with a key focus on stock management. It offers features to create new bills, view old bills, and manage stock levels. | VB.NET, MS Access, OLEDB Connection | GitHub | | Complete Inventory Management Software | A comprehensive project with barcode support, SMS integration, and a wide range of reports (Sales, Profit & Loss, Trial Balance). | VB.NET, MS SQL Server 2008 R2 | SourceCodester | | Point of Sale and Inventory System V.2 | A complete POS system with automatic receipt printing, stock monitoring, and reorder level alerts. Comes with Daily, Weekly, and Monthly Reports. | VB.NET, MySQL 5.0 | SourceCodester | | EasyBill | A premium billing software with advanced accounting and inventory features, including multiple company creation and GST support. | VB.NET, MySQL, Crystal Reports | CodeCanyon | | Pub Billing System | A simple, educational system designed for pub owners to calculate bills, manage inventory, and generate sales receipts. | VB.NET, MS Access | TechRooms.eu | | Enrollment and Billing System | A unique take on billing, designed for educational institutions to handle student enrollment, subject management, and tuition payments. | VB.NET, MySQL | SourceCodester | | HWL (Free Invoicing Software) | A free invoicing program for Windows, supporting offers, delivery notes, cash books, and collective invoices. | VB.NET | Codeberg |
A fully functional billing application typically includes these modules: vb.net billing software source code
: Logic for subtotaling, tax/VAT application, and discounts.
Perhaps the most flexible method is to design your invoice template using simple HTML and CSS. You can then use a library like HtmlRenderer.PdfSharp to generate a PDF from that HTML string, which is populated with dynamic data. This gives you complete control over the design using standard web technologies. -- Create the Database CREATE DATABASE BillingDB; GO
' Draw calculated summary elementsstartY += 20e.Graphics.DrawString("Subtotal: $" & txtSubTotal.Text, fontHeader, Brushes.Black, startX + 300, startY)startY += 20e.Graphics.DrawString("Grand Total: $" & txtGrandTotal.Text, fontTitle, Brushes.Black, startX + 220, startY)End Sub
' Draw Header Metadatae.Graphics.DrawString("RETAIL STORE INC.", fontTitle, Brushes.Black, startX, startY)startY += offsete.Graphics.DrawString("Invoice ID: " & invoiceIdToPrint, fontBody, Brushes.Black, startX, startY)startY += 20e.Graphics.DrawString("Date: " & DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), fontBody, Brushes.Black, startX, startY)startY += 30 It offers features to create new bills, view
| Priority | Action Item | Estimated Effort | | :--- | :--- | :--- | | | Replace string-concatenated SQL with Parameterized Queries immediately. | High | | High | Extract Business Logic into a separate Class Library project. | Medium | | High | Implement global Exception Handling and Logging (e.g., Log4Net or NLog). | Low | | Medium | Standardize Naming Conventions and rename UI controls. | Low | | Low | Implement Async/Await for database calls to improve UI responsiveness. | Medium |
Create a new in Visual Studio and name your form MainBillingForm . Design the interface with the following standard controls: Customer Details Section: TextBox named txtCustomerName Product Selection Section: ComboBox named cmbProducts (To load available items) TextBox named txtQuantity (To input sales volume) TextBox named txtPrice (Read-only, displays item price) Button named btnAddToGrid (Text: "Add Item") Transaction Grid: DataGridView named dgvItems
' Logic to parse quantity and price, then update total text box TextBoxLineTotal.Text = (price * qty).ToString( Use code with caution. Copied to clipboard Source: Adapted from Vb.net creating a billing system [SOLVED] - DaniWeb
: Create unlimited professional invoices with unique reference numbers.