世界

摘要： 1。Entity FrameWork的增删改：demoEntities db = new demoEntities();//EF上下文 Product product = new Product(); //product.PName = "zifu"; //product.DelFlag = 0; //db.Product.AddObject(product);//AddObject的方法的本质为先Attach，后db.ObjectStateManager.ChangeObjectState(product, EntitySta... 阅读全文