This code snippet demonstrates how to save the invoice header and calculate totals.
Due to space, the above snippets form the core. A complete project file ( BillingSystem.sln ) includes:
Public Sub OpenConnection() ' Change Data Source according to your SQL Server instance conn = New SqlConnection("Data Source=.\SQLEXPRESS;Initial Catalog=BillingDB;Integrated Security=True") If conn.State = ConnectionState.Closed Then conn.Open() End If End Sub vbnet+billing+software+source+code
VB.NET billing source code is like a – ugly, simple, easy to fix, and gets the billing job done. It won’t win design awards or handle 500 concurrent users, but for a single-window shop, tutoring material, or a quick internal tool, it’s surprisingly effective.
While the source code above provides a fully functional foundational application, production environments require additional capabilities: This code snippet demonstrates how to save the
Private Sub ClearFields() txtCode.Clear() txtProductName.Clear() txtRate.Clear() txtGST.Text = "18" End Sub
This section provides source code snippets demonstrating the core functionality using VB.NET and ADO.NET. It won’t win design awards or handle 500
💡 : Use a DataGridView for real-time item lists so users can see each line item and its subtotal before finalizing the bill.
If dt.Rows.Count > 0 Then Dim productID As Integer = dt.Rows(0)("ProductID") Dim pName As String = dt.Rows(0)("ProductName") Dim price As Decimal = Convert.ToDecimal(dt.Rows(0)("UnitPrice")) Dim gstPercent As Integer = Convert.ToInt32(dt.Rows(0)("GST_Percent"))