No Entity Framework provider found for the ADO NET provider with invariant name System Data SqlClient

Question

After downloading the EF6 by nuget and try to run my project  it returns the following error      No Entity Framework provider found for the ADO NET provider with invariant name  System Data SqlClient   Make sure the provider is registered in the  entityFramework  section of the application config file  See http   go microsoft com fwlink  LinkId 260882 for more information

User · Answer

Just Install EntityFramework package to your Web Console Project  That should add the  section to your config file

User · Answer

I also had a similar problem My problem was solved by doing the following

User · Answer

just Copy EntityFramework SqlServer dll  into bin folder

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Also  make sure you startup project is the project that contains your dbcontext  or relevant app config   Mine was trying to start up a website project which didnt have all the necessary configuration settings

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Instead of adding EntityFramework SqlServer to host project you can ensure a static reference to it from your Model entity project like this   static MyContext         var type   typeof System Data Entity SqlServer SqlProviderServices       if type    null          throw new Exception  Do not remove  ensures static reference to System Data Entity SqlServer        This will make the build process include the assembly with the host project    More info on my blog http   andersmalmgren com 2014 08 20 implicit-dependencies-and-copy-local-fails-to-copy

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it looks like nobody mentioned first checking if System Data SqlClient is installed in the system and if a reference is made to it   i solved my issue by installing System Data SqlClient and adding in a new provider in app Config   lt provider invariantName  System Data SQLite  type  System Data SQLite EF6 SQLiteProviderServices  System Data SQLite EF6   gt

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I just got into the same problem and it looks like EntityFramework although installed from NuGet Package Manager was not correctly installed in the project   I managed to fix it by running the following command on Package Manager Console   PM gt  Install-Package EntityFramework

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Expand YourModel edmx file and open YourModel Context cs class under YourModel Context tt    I added the following line in the using section and the error was fixed for me   using SqlProviderServices   System Data Entity SqlServer SqlProviderServices   You may have to add this line to the file each time the file is auto generated

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You can also see this message if you forget to include  EntityFramework SqlServer dll     It appears to be a newly added file in EF6  Initially I hadn t included it in my merge module and ran into the problem listed here

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When the error happens in tests projects the prettiest solution is to decorate the test class with    DeploymentItem  EntityFramework SqlServer dll

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I have the same error  It s weird that it only happens whenever I used my dbContext to query to any of my model or get its list like   var results    dbContext MyModel ToList      We tried to reinstall the Entity Framework  reference it properly but to no avail   Luckily  we tried to check the Nuget for ALL solutions  then update everything or make sure everything is the same version because we noticed that the two projects has different EF versions on the Web project  And it works  The error is gone   Here is the screenshot on how to Manage Nuget for all solutions

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I had one console application and class library  In class library I created Entity Data Model  right click to Class Library   Add   New Item   Data   ADO NET Entity Data Model 6 0  and put reference inside console application  So  you have console application which has reference to class library and inside class library you have EF model  I had the same error when I tried to get some records from the table    I resolved this issue by following these steps    Right click to solution and choose option  Manage NuGet Packages for Solution  and NuGet package manager window will show up  Go to  Manage   option under  Installed packages  TIP  Entity Framework is added to Class Library  so you will have EntityFramework under  Installed packages  and you ll see  Manage option Click on  Manage  option and check to install package to project which has reference to class library which holds EF model  in my case I set check box to install package to console app which had reference to class library which had EF model inside    That s all I had to do and everything worked perfect   I hope it helped

User · Answer

You don t need to install Entity Framework in your Console application  you just need to add a reference to the assembly EntityFramework SqlServer dll  You can copy this assembly from the Class Library project that uses Entity Framework to a LIB folder and add a reference to it    In summary    Class Library application   Install Entity Framework   Write your data layer code   app config file has all the configuration related to Entity Framework except for the connection string     Create a Console  web or desktop application   Add a reference to the first project    Add a reference to EntityFramework SqlServer dll    app config web config has the connection string  remember that the name of the configuration entry has to be the same as the name of the DbContext class       I hope it helps

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The startup project that references the project where Entity Framework is being used needs the following two assemblies in it s bin folder    EntityFramework dll EntityFramework SqlServer dll   Adding a  lt section gt  to the  lt configSections gt  of the  config file on the startup project makes the first assembly available in that bin directory  You can copy this from the  config file of your Entity Framework project    lt configSections gt       lt  -- For more information on Entity Framework configuration  visit http   go microsoft com fwlink  LinkID 237468 -- gt       lt section name  entityFramework  type  System Data Entity Internal ConfigFile EntityFrameworkSection  EntityFramework  Version 6 0 0 0  Culture neutral  PublicKeyToken b77a5c561934e089  requirePermission  false    gt   lt  configSections gt    To make the second  dll available in the bin folder  although not practical  a manual copy from the bin folder of the Entity Framework project can be made  A better alternative is to add to the Post-Build Events of the Entity Framework project the following lines  which will automate the process   cd   ProjectDir  xcopy  y bin Debug EntityFramework SqlServer dll     PATH TO THE PROJECT THAT NEEDS THE DLL  bin Debug

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Ran into this problem today when working with a set of web services  each in different projects  and a separate project containing integration tests for some of those services    I ve been using this setup for some time with EF5  without needing to include references to EF from the Integration Test Project    Now  after upgrading to EF6  it seems I need to include a reference to EF6 in the integration test project too  even though it is not used there  pretty much as pointed out above by user3004275    Indications you re facing the same problem    Calls directly to EF  connecting to a DB  getting data  etc  work fine  as long as they are initiated from a project that has references to EF6   Calls to the service via a published service interface work fine  i e  there are no missing references  internally  in the service  Calls directly to public methods in the service project  from a project outside the service  will cause this error  even though EF is not used in that project itself  only internally in the called project    The third point is what threw me off for a while  and I m still not sure why this is required  Adding a ref to EF6 in my Integration Test project solved it in any case

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Add below to your app config     lt entityFramework gt       lt defaultConnectionFactory type  System Data Entity Infrastructure LocalDbConnectionFactory  EntityFramework  gt         lt parameters gt           lt parameter value  v11 0    gt         lt  parameters gt       lt  defaultConnectionFactory gt       lt providers gt         lt provider invariantName  System Data SqlClient  type  System Data Entity SqlServer SqlProviderServices  EntityFramework SqlServer    gt       lt  providers gt     lt  entityFramework gt

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everybody I need your Attention that two dll EntityFramework dll And EntityFramework SqlServer dll are DataAccess layer Library And it is not Logical to Use them in view or any other layer it solves your problem but it is not logical   logical way is that enitiess attribute remove and replace them with Fluent API this is real solution

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I had the same issue  just copied the App Config file from the project that contained the DBContext to my test project

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You are just missing a reference to EntityFramework SqlServer dll  For EntityFramework projects using SQL Server  the two files you need to refer are EntityFramework SqlServer dll and EntityFramework dll

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Deleting the BIN-Folder did it for me

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I have the same issue in my 3-Tire level project  and I fixed it by adding installing the EF to my main Project

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In my case  everything was working properly then suddenly stopped worked because I think Resharper altered some changes which caused the problem  My project was divided into the data layer  service and presentation layer  I had Entity framework installed and referenced in my data layer but still the error didn t go away  Uninstalling and reinstalling didn t work either  Finally  I solved it by making the data layer the Startup project  making migration  updating the database and changing the Startup project back to my presentation layer

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You ve added EF to a class library project  You also need to add it to the project that references it  your console app  website or whatever

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I had the identical exception thrown  I included   using System Data   using System Data Entity    and everything is back to working again

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As message shows that we need to add provider System Data SqlClient that s why we need to install nuget package of EntityFramework that has two dll but if we are developing only console application then we just need to add reference of EntityFramework SqlServer dll

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I have just re-installed the Entity Framework using Nuget  And follow the instruction written on the link below   http   robsneuron blogspot in 2013 11 entity-framework-upgrade-to-6 html  I think the problem will get solved

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I just run into this problem today  I have data repository class library with EF63 NuGet package and console application for testing  which have reference only to class library project  I created very simple post-build command  which copies EntityFramework SqlServer dll from class library s Bin Debug folder to console application s Bin Debug folder and problem solved  Do not forget to add entityFramework section to console application s  config file

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I had a related issue when migrating from a CE db over to Sql Server on Azure   Just wasted 4 hrs trying to solve this   Hopefully this may save someone a similar fate   For me  I had a reference to SqlCE in my packages config file   Removing it solved my entire issue and allowed me to use migrations   Yay Microsoft for another tech with unnecessarily complex setup and config issues

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I tried almost all the above and nothing worked   Only when I set the referenced DLLs in the Default Project EntityFramework and EntityFramework SqlServer properties Copy Local to True did it start working

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Note  I had this problem while Generating Database Sql from Model  It had created all the tables fine but wouldn t export the changes  What you need to notice is that this error is generated when you try to export the sql using the DDL Generation Template as SSDLtoSQL10  It is expecting MySQL connection here so make sure you select from the drop down DDL Generation Template SSDLtoMySQL on the Model properties  Spent a whole day on this

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None of these worked for me  I did find the solution in another stackoverflow question  I ll add it here for easy reference      You need to make a reference  so it will be copied in den application   path  Because later it will be referenced in runtime  So you don t   need to copy any files    private volatile Type  dependency   public MyClass          dependency   typeof System Data Entity SqlServer SqlProviderServices

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I got the same error while using Entity Framework 6 with SQL Server Compact 4 0  The article on MSDN for Entity Framework Providers for EF6 was helpful  Running the respective provider commands as nuget packages at Package Manager Console might solve the problem  as also NuGet packages will automatically add registrations to the config file  I ran PM gt  Install-Package EntityFramework SqlServerCompact to solve the problem

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When you install Entity Framework 6 through Nuget  EntityFramework SqlServer sometime miss for another executable  Simply add the Nuget package to that project   Sometimes above does not work for Test Project  To solve this issue in Test Project just place this Method inside Test Project   public void FixEfProviderServicesProblem         var instance   System Data Entity SqlServer SqlProviderServices Instance      This method is never been called  but as my observations  the compiler will remove all  unnecessary  assemblies and without using the EntityFramework SqlServer stuff the test fails

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You should force a static reference to the EntityFramework SqlServer dll assembly  but instead of putting a dummy code  you can do this in a more beautiful way    If you already have a DbConfiguration class   public class MyConfiguration   DbConfiguration       public MyConfiguration                 this SetProviderServices System Data Entity SqlServer SqlProviderServices ProviderInvariantName  System Data Entity SqlServer SqlProviderServices Instance            If you don t have a DbConfiguration class you must put the following code at app startup  before EF is used    static MyContext         DbConfiguration Loaded     sender  e    gt          e ReplaceService lt DbProviderServices gt   s  k    gt  System Data Entity SqlServer SqlProviderServices Instance

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Add this function   private void FixEfProviderServicesProblem     to database context class in the library class and the missing DLL EntityFramework SqlServer dll will be copied to the correct places   namespace a b c       using System Data Entity       public partial class WorkflowDBContext   DbContext               public WorkflowDBContext                 base  name WorkflowDBConnStr                                public virtual DbSet lt WorkflowDefinition gt  WorkflowDefinitions   get  set            public virtual DbSet lt WorkflowInstance gt  WorkflowInstances   get  set            public virtual DbSet lt EngineAlert gt  EngineAlerts   get  set            public virtual DbSet lt AsyncWaitItem gt  AsyncWaitItems   get  set            public virtual DbSet lt TaskItem gt  TaskItems   get  set            public virtual DbSet lt TaskItemLink gt  TaskItemLinks   get  set             protected override void OnModelCreating DbModelBuilder modelBuilder                               private void FixEfProviderServicesProblem                            The Entity Framework provider type  System Data Entity SqlServer SqlProviderServices  EntityFramework SqlServer                 for the  System Data SqlClient  ADO NET provider could not be loaded                  Make sure the provider assembly is available to the running application                  See http   go microsoft com fwlink  LinkId 260882 for more information              var instance   System Data Entity SqlServer SqlProviderServices Instance

[entity-framework] No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'

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