private void AddButton_Click(object sender, EventArgs e) { GetAllData(); //MessageBox.Show($"{_salesModel.Category}{Environment.NewLine}{_salesModel.Product}"); string message = _salesManager.CanBeAdded(_salesModel); if (message.Equals("True")) { if (_salesManager.IsReorderLevelReached(_salesModel)) { MessageBox.Show("Reorder Level Reached!"); } _salesManager.AddToCart(GetProductDetails()); //_salesManager.AddToSales(_salesModel); //MessageBox.Show(_salesManager.productDetailsList.Count.ToString()); salesDataGridView.DataSource = null; salesDataGridView.DataSource = _salesManager.productDetailsList; FillTotalAndAll(); ClearUI("product"); } else { MessageBox.Show(message); } }