Question

我有以下Edit方法:

[HttpPost]
public ActionResult Edit(Movie movie)
{
    try
    {
        _db.ApplyCurrentValues("Movies1",movie);
        _db.SaveChanges();
        return RedirectToAction("Index"); 
     }
     catch
     {
         return View();
     }
 }

我的错误如下:

<编码> 标语中找不到与所提供物体的关键相匹配的物体。证明所供应物体的关键价值与必须加以修改的物体的关键价值相符。

两点:

I did not get the error the first time I did an update, only subsequent updates.
Movies1 is the the name of the EntitySet when I view the edmx designer. Is this what it shold be or should it be the name of the table (Movie)?
I have seen things regarding Attach, but I am confused as to what exactly that is.

Answer 1

要求使用现值的实体应当出现在<代码>中。 ObjectStateManager。 http://msdn.microsoft.com/en-us/library/d487246.aspx” rel=“nofollow” ApplyCurrentValues

Copies the scalar values from the supplied object into the object in the ObjectContext that has the same key.

您可以附上该实体,并适用现值。

    _db.Movies.Attach(movie);
    _db.ObjectStateManager.ChangeState(movie, EntityState.Modified);
    _db.SaveChanges();

友情链接