public async Task <ActionResult> Edit([Bind(Include = "ProductId,ItemId,OldProductId,OldItemId")] ProductItem productItem)
{
if (ModelState.IsValid)
{
if (await productItem.CanChangeAsync(db))
{
await productItem.ChangeAsync(db);
}
return(RedirectToAction("Index"));
}
return(View(productItem));
}