Vb.net Billing Software Source Code Jun 2026

To take this from a basic template to production-ready enterprise systems, you should implement the following enhancements: Structured Exception Handling

InvoiceDetails : Stores the individual line items for each invoice (Product ID, Quantity, Unit Price, Subtotal). SQL Database Script

A robust billing system must handle multiple, distinct tasks. When looking at or creating source code, these are the essential modules to include: A. Customer Management Module vb.net billing software source code

-- 4. Invoice Details table CREATE TABLE tbl_Invoice_Details ( DetailID INT PRIMARY KEY IDENTITY(1,1), InvoiceNo INT FOREIGN KEY REFERENCES tbl_Invoice_Master(InvoiceNo), ProductID INT FOREIGN KEY REFERENCES tbl_Product(ProductID), Quantity DECIMAL(18,2), Rate DECIMAL(18,2), Amount DECIMAL(18,2) );

' Update stock Dim updateStock As String = "UPDATE tbl_Product SET StockQuantity = StockQuantity - @qty WHERE ProductID = @pid" cmd = New SqlCommand(updateStock, conn, transaction) cmd.Parameters.AddWithValue("@qty", row.Cells("Quantity").Value) cmd.Parameters.AddWithValue("@pid", row.Cells("ProductID").Value) cmd.ExecuteNonQuery() Next To take this from a basic template to

discountAmt = subtotal * (Convert.ToDecimal(txtDiscountPercent.Text) / 100) grandTotal = subtotal - discountAmt + totalTax

' Draw Grid Headerse.Graphics.DrawString("Item Description", fontHeader, Brushes.Black, startX, startY)e.Graphics.DrawString("Price", fontHeader, Brushes.Black, startX + 250, startY)e.Graphics.DrawString("Qty", fontHeader, Brushes.Black, startX + 350, startY)e.Graphics.DrawString("Total", fontHeader, Brushes.Black, startX + 430, startY) Customer Management Module -- 4

Here are some fundamental code snippets you'll find in quality billing source code:

Before coding, you need a structured database. Create a database named BillingDB and execute these queries: