Can't compile project after importing stored procedure - entity-framework

Question

After importing a stored procedure into my datamodel the project stopped compiling.
It keeps giving me error:
The best overloaded method match for
'System.Data.Entity.Core.Objects.ObjectContext.ExecuteFunction<TicketDataModel.sp_get_orphanjobgrades1_Result>
(string, params System.Data.Entity.Core.Objects.ObjectParameter[])'
has some invalid arguments C:\Users\nikolaev\Documents\MySoft\TicketManager-06 11 2013\TicketManager\TicketDataModel\TicketDataModel\TicketEntities.Context.cs 105 20 TicketDataModel
and
`Argument 3: cannot convert from 'System.Data.Objects.ObjectParameter' to
'System.Data.Entity.Core.Objects.ObjectParameter'
C:\Users\nikolaev\Documents\MySoft\TicketManager-06 11 2013\TicketManager\TicketDataModel\TicketDataModel\TicketEntities.Context.cs 79 143 TicketDataModel`
The code in context.cs is as follows:
public virtual ObjectResult<sp_get_orphanjobgrades1_Result> sp_get_orphanjobgrades1(Nullable<System.DateTime> start_date, Nullable<System.DateTime> end_date)
{
var start_dateParameter = start_date.HasValue ?
new ObjectParameter("start_date", start_date) :
new ObjectParameter("start_date", typeof(System.DateTime));
var end_dateParameter = end_date.HasValue ?
new ObjectParameter("end_date", end_date) :
new ObjectParameter("end_date", typeof(System.DateTime));
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<sp_get_orphanjobgrades1_Result>("sp_get_orphanjobgrades1", start_dateParameter, end_dateParameter);
}
I read that this may be because of EF 6 and that one needs to download VS 2012 Update 1 and/or EF 6 Tools for VS 2012. I downloaded the tools and I already have update 4 installed, but that doesn't help.
Why is this?

Answer 1

The problem is that your model don't know anything about new parameters. I guess that it happens when your model using EntityFramework (EF) lower version (5.0 for example), but in code you are trying to use EF 6.0.
So, you should either downgrade your code to EF 5.0, or upgrade your model to 6.0.
Upgrading model:
Open Tools -> NuGet Package Manager -> Package Manager Console;
Choose project, that contains your model as Default project on the
top of Console.
Type "Uninstall-Package EntityFramework" and press Enter;
After removing, type "Install-Package EntityFramework -version
6.0.0" and press Enter again;
Go to YourModelName.Context.cs and YourModelName.Context.tt and replace "using
System.Data.Objects; using System.Data.Objects.DataClasses;" with "using
System.Data.Entity.Core.Objects;". Also, you may need to make the
same in all files, where this problem appears.
Or you can downgrade EF version, used in your code. For this, you should do all the same in first 3 steps but in the fourth replace "-version 6.0.0" with "-version 5.0.0". The 5th step is not needed for this.

Answer 2

To fix this issue:
If version conflicts, install package for respective version of EF.
If version is same, change the above namespace to System.Data.Entity.Core.Objects

Answer 3

You can download new verions in msdn.
Download Tools for Entity Framework 6.1.0 or new versions
in http://www.microsoft.com/en-us/download/details.aspx?id=40762
Use in Package Manager Console
Install-Package EntityFramework -version 6.1.0 and enter
Restart your visual studio.
4.Check your package Manager and finish.

Answer 4

I just want to add that this happened to me after starting a brand new project. The issue was that I had created a new project, and then proceeded to update the Entity Framework, ASP.Net MVC, and other packages through the NuGet Package Manager. So, the code generated for my project no longer matched what I had installed.
The quickest solution for me was to just create a new project since I hadn't done any real work yet. I hope this helps somebody else out there.

Answer 5

My situation was a new project, and I went to nuget with Install-Package EntityFramework which installed the 6.0 version, however apparently my project was already set up with an earlier version? Not sure how, maybe the default of MVC 4.0 project...
So I had to do an Uninstall-Package -force EntityFramework followed by
Install-Package EntityFramework -version 5.0.0
Everything worked after that.