CODEWITHSUNDEEP
c#asp.net-mvc-3entity-framework-4resharper
Rizowski
Rizowski

Reputation: 3598

Cannot resolve Symbol ObjectStateManager

I have getting an Error of "Cannot Resolve Symbol ObjectStateManager" when trying to call it on my Database context from Entity Framework 4. I can't find anyone else having this issue. I have tried using System.Data and System.Data.Objects.

Is there a specific Entity Framework that needs to be made in order to use the ObjectStateManager? Or Am I missing some sort of install package? I am using Database First Entity Framework.

Here is the code it is giving my error: (Line 7)

[HttpPost]
        public ActionResult EditProfile(User user)
        {
            if (ModelState.IsValid)
            {
                db.Users.Attach(user);
                db.ObjectStateManager.ChangeObjectState(user, EntityState.Modified);
                db.SaveChanges();
            }
            return RedirectToAction("Profile");
        }

Upvotes: 13

Views: 10931

Answers (4)

hwnd
hwnd

Reputation: 1

One additional item to check is that the target .net framework for the project is set to .net 4+.

Upvotes: 0

Paul King
Paul King

Reputation: 321

I am sure you found a solution by now but I ran into the same issue just now and was able to resolve it by changing the EntityState line to the following: 

db.Entry(user).State = EntityState.Modified;

Upvotes: 28

Vitaliy Kalinin
Vitaliy Kalinin

Reputation: 1871

Probably you are using code first EF. In this case you have to revert yours code to explicit implemenatation of IObjectContextAdapter, i.e.

((IObjectContextAdapter)db).ObjectContext.ObjectStateManager

Upvotes: 14

Justin Self
Justin Self

Reputation: 6265

Have you added the System.Data.Entity assembly to the project?

Also System.Data.Objects is correct.

Upvotes: 0

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