ASP.Net MVC 3 & System.Data.Entity?

Question

I'm creating my first asp.net MVC website(the version 3).

I'm using Entity Framework to get data from my database, so for now, I've a movies list in my database.

I'm trying to do a page which display the list of these movies.

So, the controller seems to be OK, it returns a View(IEnumerable).

In the view, I specified the type of my model:

@model IEnumerable

Movie is a class generated with a T4 template from my edmx, so it is heriting from EntityObject.

Now, when I try to display my page, I'm getting an error, indicating me that I've to import System.Data.Entity:

Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0012: Le type 'System.Data.Objects.DataClasses.EntityObject' est défini dans un assembly qui n'est pas référencé. Vous devez ajouter une référence à l'assembly 'System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Source Error:

Line 27: Line 28: Line 29:
public class _Page_Views_Movie_List_cshtml : System.Web.Mvc.WebViewPage> { Line 30: Line 31: #line hidden

Source File: c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\93402ec0\8f8e48f4\App_Web_list.cshtml.9612c299.pwpwk-k5.0.cs Line: 29

But, I've referenced this dll in my project and i've the corresponding using in my controller.

I tried to put this using in the cshtml: @using System.Data.Entity but it doesn't compile with(cannot find Entity in System.Data)

So what should I do?

all my projects are .Net 4(not the client profile)

For the love of all programming gods, uninstall your .NET Framework language packs for English exception messages. — Mathias Lykkegaard Lorenzen
– Mathias Lykkegaard Lorenzen, Commented Jun 25, 2012 at 11:50

David · Accepted Answer · 2011-05-06 16:38:46Z

3

add the following line to your web.config

<add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

answered May 6, 2011 at 16:38

David

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2 Comments

J4N Over a year ago

I tried: <system.web> <compilation> <assemblies> <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/> </assemblies> </compilation> </system.web> but it doesn't change anything

BLoB Over a year ago

Adding this reference allows you to specify @using System.Data.Entity in your view, which allows you to reference entities

Adam Tuliper · Accepted Answer · 2011-05-06 16:34:07Z

1

two things - 1. change your model definition as was mentioned by Muhammed - its more standard that way as well 2. include a reference to: C:\Program Files\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0\System.Data.Entity.dll

OR use the POCO Entity.Net templates in whatever projects your entities are in to free you from the dependency on that library in your mvc project.

answered May 6, 2011 at 16:34

Adam Tuliper

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Comments

İbrahim Özbölük · Accepted Answer · 2013-06-13 14:42:21Z

1

For Asp.Net Mvc 2 And 3

 <compilation debug="true" targetFramework="4.0" >
 <assemblies>
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
  ...
 </assemblies>

For ASP.NET MVC 4 (.NET4.5) change from

<system.web>
     <compilation debug="true" targetFramework="4.0" />

To

 <system.web>
   <compilation debug="true" targetFramework="4.0" >
      <assemblies>
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
      </assemblies>
    </compilation>

edited Jun 13, 2013 at 14:42

answered Apr 16, 2013 at 7:13

İbrahim Özbölük

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Comments

Pieter van Niekerk · Accepted Answer · 2011-05-26 06:33:16Z

0

Please try specifying typed enumeration like

@model IEnumerable<MyEntityObjectType>

edited May 26, 2011 at 6:33

Pieter van Niekerk

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answered May 6, 2011 at 15:15

Muhammad Adeel Zahid

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