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;
}