''' ''' Graphic layout handling routine logic constructing receipt printing structure formatting.''' Private Sub PrintPageHandler(sender As Object, e As PrintPageEventArgs)Dim graphicEngine As Graphics = e.GraphicsDim fontNormal As New Font("Courier New", 10, FontStyle.Regular)Dim fontBold As New Font("Courier New", 11, FontStyle.Bold)Dim fontHeader As New Font("Courier New", 16, FontStyle.Bold)
Have you built a billing system in VB.NET? Share your experience or ask for specific code modules in the comments below.
Which database platform are you targeting ()?
Below is a comprehensive guide and a modular breakdown of the source code for a standard Desktop Billing Application. 1. Project Prerequisites
Tools to generate daily sales summaries and financial reports for business owners. vb.net billing software source code
Public Class frmBilling Private dtCart As New DataTable() Private currentInvoiceNumber As String = ""
: A project that integrates SQLite 3, making it a great option if you need a lightweight, standalone database. Sourcecodester VB Projects
In frm_Billing.vb , a DataGridView acts as the cart. The user scans a barcode or selects a product, and it is added to the cart.
If you require (such as Crystal Reports or RDLC) ''' ''' Graphic layout handling routine logic constructing
Imports System.Data.OleDb Module modDatabase ' Update the Data Source path to match your local project environment Public ConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\BillingDB.accdb;Persist Security Info=False;" Public Function GetDatabaseConnection() As OleDbConnection Dim conn As New OleDbConnection(ConnectionString) Try If conn.State = ConnectionState.Closed Then conn.Open() End If Return conn Catch ex As Exception MsgBox("Database Connection Error: " & ex.Message, MsgBoxStyle.Critical, "Error") Return Nothing End Try End Function End Module Use code with caution. Main Billing Form Logic ( frmBilling.vb )
Before writing application logic, the relational database must be established. The billing system relies on four primary entities: Products, Customers, Invoices, and Invoice Details.
Searching for "VB.NET Billing System" will yield many open-source projects.
Catch ex As Exception transaction.Rollback() MessageBox.Show("Error saving invoice: " & ex.Message) End Try Below is a comprehensive guide and a modular
This snippet demonstrates calculating the total based on quantity and unit price.
-- Invoice Details Table (Multiple rows per invoice) 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_Products(ProductID), Quantity INT, Rate DECIMAL(18,2), Total DECIMAL(18,2) );
End Class
Private Sub btnRemoveFromCart_Click(sender As Object, e As EventArgs) Handles btnRemoveFromCart.Click If dgvCart.CurrentRow IsNot Nothing Then dtCart.Rows.RemoveAt(dgvCart.CurrentRow.Index) UpdateGrandTotal() End If End Sub