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Building a Complete Billing Software in VB.NET: Full Source Code & Architecture Guide
' Calculate Line Total dgvCart.Rows(e.RowIndex).Cells("LineTotal").Value = qty * price
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' Example: Calculating total on DataGridView Cell End Edit Private Sub dgvCart_CellEndEdit(sender As Object, e As DataGridViewCellEventArgs) Handles dgvCart.CellEndEdit If e.ColumnIndex = dgvCart.Columns("Quantity").Index Then Dim qty As Integer = CInt(dgvCart.Rows(e.RowIndex).Cells("Quantity").Value) Dim price As Decimal = CDec(dgvCart.Rows(e.RowIndex).Cells("Price").Value) Building a Complete Billing Software in VB