EntityFrameworks.dll file missing?

Question

I am totally new to the .NET world and been trying to build an MVC application following this tutorial, creating a database first then creating an MVC project on top of it and whenever I create the Models from the existing db I get a number of errors like this:

Error 1 Compiling transformation: Metadata file '%VS120COMNTOOLS%..\IDE\EntityFramework.dll' could not be found c:\users\j\desktop\visual studio 2013\Projects\ContosoSite\ContosoSite\Models\ContosoModel.tt

And this one also:

Error 2 Compiling transformation: Metadata file '%VS120COMNTOOLS%..\IDE\Microsoft.Data.Entity.Design.dll' could not be found c:\users\j\desktop\visual studio 2013\Projects\ContosoSite\ContosoSite\Models\ContosoModel.tt

I have Entity Frameworks installed (version 6.1)

after hours of googling and searching for answers apparently there is a(or many) file(s) missing (dll?) in my Windows 8.1 OS.

Has anyone come up with a solution for this?

J

Did you find this post: http://stackoverflow.com/questions/19664833/metadata-file-not-found-data-entity-model — rene, Apr 12 '14 at 14:50
@meda what do you mean by install through nuggets? is it the dll file? — Jax, Apr 12 '14 at 15:19
`Install-Package EntityFramework` run that in the package manager console — meda, Apr 12 '14 at 15:20

score 4 · Accepted Answer · edited May 23 '17 at 12:31

4

Followed the steps as per this stackoverflow, rebuilt the Models from the db and voila! All Sorted

Credit to @Jaon

Check your install location. I installed VS to the other location D:\ than default C:\ so I got the error.
modify "Environment Variables" to your location, for me it means changing C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\ to D:\Microsoft Visual Studio 12.0\Common7\Tools.
DON'T Forget to add a \ to the end of word.

edited May 23 '17 at 12:31

Community

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answered Apr 14 '14 at 15:50

Jax

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How do you get to Environment Variables? – Zorgarath Feb 04 '16 at 06:40
* Open Windows explorer * Right click on "This PC/My Computer" * From the context menu select "Properties" * In the opened windows Click "Advanced System Properties" – armadillo.mx Aug 27 '18 at 22:04
I have the same issue in VS 2019, but I don't have any System Variable relative to it – Giox Jun 12 '19 at 17:26

score 2 · Answer 2 · answered Apr 13 '14 at 14:55

The project in the example uses the help of a library called "Entity Framework" to help with database queries. In Visual Studio these libraries are installed as Nuget Packages. For more info about Nugets, check this link

In order to install this library follow these steps in your Visual Studio IDE. Go to Tools>Package Manager Console>Package Manager Console. When the console opens up, type "Install-Package EntityFramework" and hit enter key. This will install Entity Framework Nuget Package to your IDE. Then you can use this library by adding a using reference.

I have EF 6.1 installed in my project (I just amended my question, apologies if this was not clear) — Jax, Apr 14 '14 at 13:31

score 0 · Answer 3 · answered Aug 31 '19 at 07:20

0

I had same problem with VS2019. I shared my experience here.

The file that needs to be edited is in the “C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes” directory. The file you want to edit (assuming you are using EF6 and C#) is called EF6.Utility.CS.ttinclude. If you edit that file and replace “$(VSAPPIDDIR)EntityFramework.dll” with the full path to “…\Common7\IDE\EntityFramework.dll” (and similarly for the other reference to VSAPPIDDIR) then you should be good to go.

answered Aug 31 '19 at 07:20

Arash Ghasemi Rad

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File is locked or read-only when I try to edit. (Visual Studio is shut down). – lonstar Feb 10 '20 at 00:57
Save a copy in your desktop and replace it with original file. Try changing file attributes or start your windows in safe mode. – Arash Ghasemi Rad Feb 21 '20 at 22:37

EntityFrameworks.dll file missing?

3 Answers3