A simple online sales platform with simple functions, mainly demonstrating the application data layer developed in a simple three-layer model through the addition, deletion and modification of products: MyWatchShopDAL Model layer: MyWatchShopModels Logic layer: MyWatchShopBLL Application layer: MyWatchShop (website) Database operations use SqlHelper The Master file menu is adopted and Treeview+XML is used. Under DB is the Sql database, just attach it
