public ActionResult Edit([Bind(Include = "Id,Name,Category,CreateDate")] Product product) { if (ModelState.IsValid) { db.Entry(product).State = EntityState.Modified; db.SaveChanges(); return(RedirectToAction("Index")); } ViewBag.Category = new SelectList(db.Categories, "Id", "Name", product.Category); return(View(product)); }
public async Task <ActionResult> Edit([Bind(Include = "Id,Name")] Category category) { if (ModelState.IsValid) { db.Entry(category).State = EntityState.Modified; await db.SaveChangesAsync(); await RedisLib.DeleteCache("Categories"); return(RedirectToAction("Index")); } return(View(category)); }
//【2】显示加载(就是我们关闭延迟加载后,如果需要再次加载,可以使用) private static void ExplicitLoading() { using (EFDBEntities db = new EFDBEntities()) { db.Database.Log = Console.WriteLine; //关闭延迟加载 db.Configuration.LazyLoadingEnabled = false; var student = db.Students.FirstOrDefault(); //对于已经关闭的延迟加载,我们可以再次手动开启 db.Entry(student).Reference(s => s.StudentClass).Load(); //以下就会出错 var className = student.StudentClass.ClassName; } Console.Read(); }
public virtual void Update(TEntity entity) { _dbSet.Attach(entity); _dbContext.Entry(entity).State = EntityState.Modified; }