Vbnet+billing+software+source+code [2021] -

Seamless connectivity with SQL Server, MySQL, and MS Access using ADO.NET.

To take your billing application to the next level, consider adding:

-- Create Products Table CREATE TABLE Products ( ProductID VARCHAR(50) PRIMARY KEY, ProductName VARCHAR(100) NOT NULL, UnitPrice DECIMAL(18, 2) NOT NULL, TaxRate DECIMAL(5, 2) DEFAULT 0.00, StockQuantity INT NOT NULL ); -- Create Invoice Master Table CREATE TABLE Invoices ( InvoiceNo INT IDENTITY(1001, 1) PRIMARY KEY, InvoiceDate DATETIME DEFAULT GETDATE(), CustomerName VARCHAR(100) DEFAULT 'Cash Customer', SubTotal DECIMAL(18, 2) NOT NULL, TaxAmount DECIMAL(18, 2) NOT NULL, Discount DECIMAL(18, 2) DEFAULT 0.00, GrandTotal DECIMAL(18, 2) NOT NULL ); -- Create Invoice Details Table CREATE TABLE InvoiceDetails ( DetailID INT IDENTITY(1,1) PRIMARY KEY, InvoiceNo INT FOREIGN KEY REFERENCES Invoices(InvoiceNo), ProductID VARCHAR(50) FOREIGN KEY REFERENCES Products(ProductID), Qty INT NOT NULL, Price DECIMAL(18, 2) NOT NULL, Total DECIMAL(18, 2) NOT NULL ); Use code with caution. 3. Core VB.NET Billing Source Code vbnet+billing+software+source+code

This code snippet demonstrates how to save the invoice header and calculate totals.

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Private Sub txtProductCode_KeyDown(sender As Object, e As KeyEventArgs) Handles txtProductCode.KeyDown If e.KeyCode = Keys.Enter Then Dim productCode As String = txtProductCode.Text.Trim() Dim query As String = $"SELECT ProductID, ProductName, UnitPrice, StockQuantity, GST_Percent FROM tbl_Products WHERE ProductCode='productCode'" Dim dt As DataTable = ExecuteQuery(query)

[Products] 1 -------- 0..* [InvoiceDetails] *..0 -------- 1 [Invoices] SQL Schema Definition Core VB

invoiceContent = sb.ToString() pd.Print()

✅ – Many examples include direct printer support or barcode generation (e.g., using Graphics.DrawString or free barcode fonts).