Oracle ODP.Net With Entity Framework 6 - Entity framework database compatible provider could not be found

I finally was able to to use ODP with EF6.

I did the following to make it work :-

First Installing ODAC 12c Release 3 which includes support for Entity Framework 6 Code First and Code First Migrations; NuGet, .NET Framework 4.5.2; and ODP.NET, Managed Driver XML DB. As per

http://www.oracle.com/technetwork/topics/dotnet/whatsnew/index.html

Adding two references , to my project references and they are :

Oracle.ManagedDataAccess.dll

Oracle.ManagedDataAccess.EntityFramework.dll

Installing EF6.1.1 using NuGet by running the following command in Package Manager Console( you can enter it by Tools->NuGet Package Manager -> Package Manager Console):

Install-Package EntityFramework -Version 6.1.1

And modify your web.config or web.config to use Oracle.ManagedDataAccess , by adding Provider and a valid connection string eg :

<configSections>    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />    <section name="Oracle.ManagedDataAccess.Client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->  </configSections>  <entityFramework>    <contexts>      <context type="App.Context.Default, App.Context">        <databaseInitializer type="MyProject.Context.Config.ContextInitializer, MyProject.Context" />      </context>    </contexts>    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />    <providers>      <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />    </providers>  </entityFramework>  <connectionStrings>    <add name="Default" providerName="Oracle.ManagedDataAccess.Client" connectionString="DATA SOURCE=XE;USER ID=User" />  </connectionStrings>

Rebuild your Application as x86, and start using EF6 , you can check if it works by adding a model using ADO.Net Entity Model using Code First

Just to complement, i've tried everything but in my case it was solved by setting the "defaultConnectionFactory", like this:

<entityFramework><defaultConnectionFactory type="Oracle.ManagedDataAccess.EntityFramework.OracleConnectionFactory, Oracle.ManagedDataAccess.EntityFramework"></defaultConnectionFactory><providers>  <provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342" /></providers></entityFramework>

found the solution here: https://community.oracle.com/message/13114643#13114643

I hope it helps someone...

I tried everything in the selected answer but I couldn't create my models. I had the same issue as @WAQ in the comments of the selected answer, where I didn't get the error message but it skipped to the table selection.

I'm using VS2017 15.7.4, Oracle 12g, and EF 6.1.1.

I decided to downgrade Oracle.ManagedDataAccess.EntityFramework and Oracle.ManagedDataAccess from 18.3.0 to 12.2.1100 and it finally worked!