Cannot implicitly convert type System.Data.Entity.Core.Objects.ObjectResult to System.Data.Objects.ObjectResult

Question

I am trying to update an EDMX Stored Procedure and I am getting this error:

Cannot implicitly convert type System.Data.Entity.Core.Objects.ObjectResult

Answer 1

You only have to change "using System.Data.Objects" to "using System.Data.Entity.Core.Objects"

Answer 2

Open the context.tt file in XML mode and change

using System.Data.Objects;

to

using System.Data.Entity.Core.Objects;

Answer 3

Either use VS 2013 or download the new Entity Framework 6 Tools for Visual Studio 2012.

Answer 4

I had the error and none of these solutions worked (I was already using System.Data.Entity.Core.Objects, it was also in the context.tt, etc).

I eventually realised the problem lay between the keyboard and the chair. The stored proc finished with a select, but I was trying:

MyStoredProc_Result r = dbcontext.MyStoredPoc();

Instead of

MyStoredProc_Result r = dbcontext.MyStoredPoc().FirstOrDefault();

Answer 5

You need to upgrade to the new Entity Framework 6 runtime.

Right-click on your project and select Manage NuGet Packages... Under the Online tab select EntityFramework and click Install Note: If a previous version of the EntityFramework NuGet package was installed this will upgrade it to EF6. Alternatively, you can run the following command from Package Manager Console:

PM> Install-Package EntityFramework

Reference: http://msdn.microsoft.com/en-US/data/upgradeEF6