Vb.net Billing Software Source Code

InvoiceDetails (Invoice ID, Item ID, Quantity, Price, Discount) 2. The Data Access Layer (DAL)

This snippet demonstrates how to take inputs from your application and save them to a file using the namespace.

Private Sub frmMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load lblUser.Text = "Welcome, " & Environment.UserName lblDateTime.Text = DateTime.Now.ToString() vb.net billing software source code

' Example: Function to add a new product Public Sub AddProduct(productName As String, price As Decimal) Using conn As New SqlConnection("YourConnectionString") Dim cmd As New SqlCommand("INSERT INTO Products (ProductName, Price) VALUES (@PN, @P)", conn) cmd.Parameters.AddWithValue("@PN", productName) cmd.Parameters.AddWithValue("@P", price) conn.Open() cmd.ExecuteNonQuery() End Using End Sub Use code with caution. 3. The Business Logic Layer (BLL)

When exploring , you should look for the following fundamental modules to ensure the application is functional and secure: that’s a huge bonus.

A complete VB.NET billing solution typically includes:

Private Sub ResetForm() dtCart.Clear() GenerateInvoiceNumber() UpdateGrandTotal() ClearProductFields() cmbCustomer.SelectedIndex = -1 cmbPaymentMethod.SelectedIndex = -1 End Sub LineTotal) VALUES (@invNo

The VB.NET billing software source code is written in Visual Basic .NET (VB.NET), a popular programming language used for developing Windows-based applications. The source code consists of several classes, modules, and forms that work together to provide the functionality of the software.

Public Function SaveBill(customerID As Integer, dtCart As DataTable, paymentMode As String) As Boolean Using transaction As SqlTransaction = con.BeginTransaction() Try ' 1. Insert into tbl_Invoice Dim cmdHeader As New SqlCommand("INSERT INTO tbl_Invoice (InvoiceDate, CustomerID, SubTotal, GST_Amount, GrandTotal, PaymentMode) OUTPUT INSERTED.InvoiceNo VALUES (@date, @cust, @sub, @gst, @grand, @mode)", con, transaction) ' ... add parameters from calculated totals ... Dim newInvoiceNo As Integer = Convert.ToInt32(cmdHeader.ExecuteScalar()) ' 2. Insert each row into tbl_InvoiceDetails & reduce stock For Each row As DataGridViewRow In dtCart.Rows ' Insert details Dim cmdDetail As New SqlCommand("INSERT INTO tbl_InvoiceDetails (InvoiceNo, ProductID, Quantity, Price, GST_Percent, LineTotal) VALUES (@invNo, @pid, @qty, @price, @gst, @lineTotal)", con, transaction) ' ... add parameters ...

The heart of billing software is the report. Look for projects using RDLC (Report Definition Language Client) or Crystal Reports. If the source code includes a "Drag and Drop" report designer, that’s a huge bonus.

cmdStock.Parameters.AddWithValue("?", prodID)cmdStock.ExecuteNonQuery()End UsingNext