Vb.net Billing Software Source Code May 2026

dgvItems.Rows.Add(productID, productName, qty, price, total) CalculateTotals() End Sub

Private Sub btnPrint_Click(sender As Object, e As EventArgs) Handles btnPrint.Click PrintDocument1.Print() End Sub

Private Sub LoadBillData() ' Fetch Bill Header and Items using billID from DB ' (Implement using OleDbDataAdapter) ' Then bind to PrintDocument End Sub vb.net billing software source code

Private Sub frmBilling_Load(sender As Object, e As EventArgs) Handles MyBase.Load LoadProductsIntoCombo() ResetBill() End Sub

Private Sub btnNewBill_Click(sender As Object, e As EventArgs) Handles btnNewBill.Click ResetBill() End Sub dgvItems

Private Sub LoadProductsIntoCombo() Dim query As String = "SELECT ProductID, ProductName FROM Products" Using conn As New OleDbConnection(connString) Dim da As New OleDbDataAdapter(query, conn) Dim dt As New DataTable() da.Fill(dt) cboProduct.DataSource = dt cboProduct.DisplayMember = "ProductName" cboProduct.ValueMember = "ProductID" End Using End Sub

Private Function GetProductPrice(productID As Integer) As Decimal Dim query As String = "SELECT Price FROM Products WHERE ProductID = @pid" Using conn As New OleDbConnection(connString) Dim cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@pid", productID) conn.Open() Return CDec(cmd.ExecuteScalar()) End Using End Function vb.net billing software source code

Private Sub PrintDocument1_PrintPage(sender As Object, e As PrintPageEventArgs) Handles PrintDocument1.PrintPage Dim font As New Font("Arial", 10) Dim y As Single = e.MarginBounds.Top