private void Sell_Button_Click(object sender, EventArgs e) { this.Id_Box.Text = this.All_Products_Grid_View.CurrentRow.Cells["Id"].Value.ToString(); ProductController.SellProduct(Id_Box.Text, Name_Box.Text, Batch_Label.Text, Unit_Price_Label.Text, Sell_Quantity_Box.Text); All_Products_Grid_View.DataSource = ProductController.GetAllProducts(); SaleController.AddSales(Id_Box.Text, Name_Box.Text, Batch_Label.Text, Sell_Quantity_Box.Text, Unit_Price_Label.Text); Sold_Products_Grid_View.DataSource = SaleController.GetAllSales(); }