public Sales_Order(int ID) { InitializeComponent(); CustID = ID; //ProductsReceivedTable.Columns.Add("rotid"); //ProductsReceivedTable.Columns.Add("roid"); CartTable.Columns.Add("ID"); CartTable.Columns.Add("Product"); CartTable.Columns.Add("Quantity"); CartTable.Columns.Add("Total Price"); Cart.DataSource = CartTable; dgvCart.DataSource = Cart; ProductsData.DataSource = GeneralMethods.GetProductsForSalesOrder(); dgvProducts.DataSource = ProductsData; dgvProducts.ClearSelection(); cmbVendor.DataSource = GeneralMethods.GetVendors(); cmbVendor.DisplayMember = "vname"; cmbVendor.SelectedIndex = -1; cmbCategory.DataSource = GeneralMethods.GetCategories(); cmbCategory.DisplayMember = "catname"; cmbCategory.SelectedIndex = -1; }