public static void BindCustomerCombo(ref ComboBox cbo, bool ALL) { bool UseNames = ConfigurationReader.ReadKeyBoolean(ConfigurationKeys.UseCustomerNames); Customer obj = new Customer(); DataTable dt = new DataTable(); string valueMember = "CustomerId"; //string displayMember = "SupplierCode"; string displayMember = "CustomerCode"; if (UseNames) //displayMember = "SupplierName"; displayMember = "CustomerName"; dt = obj.SelectAllCustomer(); BindCombo(ref cbo, dt, displayMember, valueMember, ALL); if (cbo.Items.Count > 0) cbo.SelectedIndex = 0; }