CODEWITHSUNDEEP
c#entity-frameworkentity-framework-5
Rovdjuret
Rovdjuret

Reputation: 1528

Could not determine storage version - Entity Framework

I'm implementing code first pattern in a separate project in my current solution. Since I did this and I initialize my connection string in DbContext I get this weird error:

Could not determine storage version; a valid storage connection or a version hint is required.

I'm using Entity Framework 5.0.0.0 and the rest of my solutions projects work great as they use EDMX files for database access yet only my code first project throws this exception. What is it and why?

Upvotes: 12

Views: 19352

Answers (6)

Shivam Srivastava
Shivam Srivastava

Reputation: 4596

Follow following steps.

  1. Update the entity framwework to latest stable version.
  2. Update the edmx model.
  3. Right click over file .edmx
  4. Open with.. Editor XML
  5. Change ProviderManifestToken="XXXX" with 2008

Upvotes: 0

F. Mashozhera
F. Mashozhera

Reputation: 1

I had the same issue. In my case, for some reason the app config did not have the entity framework section in configSections tag. adding it solved my issue.

required app.config/web.config line

Upvotes: 0

Thiru
Thiru

Reputation: 19

Install EFTools6.1.3ForVS2012, mine got solved

Upvotes: 1

Gary Boone
Gary Boone

Reputation: 41

Drop EF table __MigrationHistory, assuming you were just playing with migrations in test.

Upvotes: 4

Sithu
Sithu

Reputation: 4431

Solved the same issue with:

Go to Solution Explorer

  1. Right click on "xxx.edmx" file
  2. Select "Open with" >> Editor XML Editor
  3. Change ProviderManifestToken="XXXX" with 2008

Upvotes: 29

Rovdjuret
Rovdjuret

Reputation: 1528

It seems problem got solved when I upgraded Entity Framework for every project using it to Entity Framework 6.1.2.

Works like a charm!

Upvotes: 6

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