Hello guys I am strugling with connecting to sql database server. I am using Entity framework v6 and trying code first approach for the first time. Below I will show you my app.config file and error message I get I checked out similar questions and most of answers were about missing EntityFramework.SqlServer.dll I have this dll referenced
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="HotelDB"
connectionString="Data Source=(localdb)\v11.0;Initial Catalog=master;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False"/>
</connectionStrings>
</configuration>
Error Message:
System.InvalidOperationException: 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.
Have you found a solution for this problem? Otherwise you could take a look here: Entity Framework Provider type could not be loaded?
Most of the time when I see this exception it's because the web application doesn't have Entity Framework installed (and / or missing the EntityFramework.SqlServer.dll).
So to give an example, if you have 2 projects in a solution:
WebApp
DataAccess
and with Entity Framework installed in the DataAccess project. When wanting to call a method on a class (for example a repository) from the DataAccess project within the WebApp, 2 things are needed:
WebApp needs a reference to DataAccess
Webapp also needs EF to be installed
When DataAccess has EF installed and then added as a reference to WebApp, the WebApp project will (normally) also install EF. Sometimes in unexpected situations the installation of EF in the WebApp fails. Therefore not adding the needed references and showing the exception message you mentioned. Hopefully this answer will help some others.
I also had a similar problem
My problem was solved by doing the following:
If nothing of the solutions worked then check both the packages.config of WebApp and DataAccess for the version of Entity Framework. In case you see or don't see the entry of EF in the packages.config file of WebApp, go to the reference and delete the EF from WebApp and install it again using the package manager console giving the following command:
Install-Package "EntityFramework" -Version (Version number)
where Version number is the version that's present in the packages.config of DataAccess.
Example:
Install-Package "EntityFramework" -Version "6.1.3"
Related
I' am getting this:
The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.
error in my Entity Framework.
I read this Question and the possible answers, however non of them worked for me. Here is my App.config file:
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<connectionStrings>
<add name="SalesReportEntities"
connectionString="metadata=res://*/SalesReportModel.csdl
|res://*/SalesReportModel.ssdl
|res://*/SalesReportModel.msl;
provider=System.Data.SqlClient;
provider connection string="data source=.;
initial catalog=Training;
integrated security=True;
MultipleActiveResultSets=True;
App=EntityFramework""
providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
What other possible things can cause this error?
I can offer a few suggestions and some are similar to the thread you already looked at:
Can you use SQL Management Studio and verify this database exists and has tables and is currently in a responsive state?
Put your 'connectionStrings' section after the < providers > node.
Your parameter value is 'v11.0' which seems to be targeting a version of SQL Server 2012. Mine that I am looking at now is similar to yours but just states: "mssqllocaldb". Which I believe is just the default instance of sql server from the connection you specify.
Uninstall Entity Framework completely and get it again from NuGet. I assume you are using Visual Studio so in 2015 it is Tools>NuGet Package Manager>Manage NuGet Packages. Uninstall, check your app config and 'References' that 'EntityFramework' is gone. Reinstall and check your settings again.
Are you trying to reference a project that entity lives in in another project or is it self contained? If so you need to target EF just like you were on the source project with adding EF to that project and a config the same.
You may also want to post the entire exception for better answers too.
I just upgraded EF to 6.1.3 and I'm getting the 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.
Everything was working fine with version 6.1.2.
I installed EF through the Manage NuGet Packages for Solution and also directly using the PM console.
I also have a reference to the latest EntityFramework.SqlServer.dll in the projects where I'm using EF.
EF is in my Model project and the app.config looks like this:
<entityFramework>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
</entityFramework>
The MVC project has the actual connection strings (in a separate file outide web.config) and they are:
<?xml version="1.0" encoding="utf-8" ?>
<connectionStrings>
<clear/>
<add name="Blank" connectionString="data source=myserver;initial catalog=mydb;user id=***;password=***;MultipleActiveResultSets=True;App=MyApp" providerName="System.Data.SqlClient" />
</connectionStrings>
Should I reinstall the previous version? What is the solution for this problem?
EDIT
The problem was that the main MVC project was referencing EntityFramework.SqlServer.dll from version 6.1.2. This reference was removed and the DLL from version 6.1.3 is now being referenced. The app now works fine.
However, is there an alternative to referencing this DLL if it's not needed in the main project?
We have ASP.NET WebSite and it refers project (dll) which refer EntityFramework dll. We have added EntityFramework.dll and EntityFramework.SqlServer.dll reference to bin folder manually(not through Nuget). We are using Octopus to deploy our websites. While deploying we dont have EntityFramework.SqlServer dll in bin folder. I have gone through various answers but couldn't get it.
Anybody know the answer on the same? I have tried publishing through VS and I see SqlServer of EF in bin folder. Surprisingly we dont have any reference entry in our web.config for EF dll version.
Not sure about adding below code which some of them suggested -
var ensureDLLIsCopied = System.Data.Entity.SqlServer.SqlProviderServices.Instance;
Error Message-
ERROR occurred in LockAutomationNotification.NotifyEmail
System.Data.Entity.Core.MetadataException: Schema specified is not valid. Errors:
OLIEDataModel.ssdl(2,2) : error 0152: 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
Answer to your first question is here. It is happening as EntityFramework.SqlServer.dll is referenced internally by EntityFramework.dll but not your project code.
The new error you're getting is because of your missing configurations. Please add below settings in web.config file of your website:
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
A bit stumped with this one...
I'm receiving the following error when setting up Code First on Entity Framework and Oracle...
No Entity Framework provider found for the ADO.NET provider with
invariant name 'Oracle.ManagedDataAccess.Client'. Make sure the
provider is registered in the 'entityFramework' section of the
application config file.
With the following setup...
Entity Framework 6.1.1
ODAC 12c Release 3
Any ideas on how to fix this problem?
I've included the app.config file below...
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --></configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<connectionStrings>
<add name="Context" connectionString="DATA SOURCE=****;PASSWORD=****;PERSIST SECURITY INFO=True;POOLING=False;USER ID=SYSTEM" providerName="Oracle.ManagedDataAccess.Client" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
since you have used a providerName Oracle.ManagedDataAccess.Client in connectionString. you need to add a line in following section to define it:
<providers>
<provider invariantName="Oracle.ManagedDataAccess.Client" type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices,OracleManagedDataAccess.EntityFramework" />
</providers>
Am trying to do the same . but not working with me either , Did you managed to make it work ?
Try to add the provider to your config file :
<providers>
<provider invariantName="Oracle.ManagedDataAccess.Client"
type="Oracle.ManagedDataAccess.EntityFramework.EFOracleProviderServices, Oracle.ManagedDataAccess.EntityFramework, Version=6.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
</providers>
Also check this link
https://community.oracle.com/message/12679686
After messing today for a few hours with the same error I found that I missed to select the correct T4 templates (see step #3)
Install "ODAC 12c Release 3 and Oracle Developer Tools for Visual Studio"
Btw. I found this note on a Oracle website:
Note: If you have installed ODAC 12c Release 3 configured on a machine-wide level, you will see an error when trying to generate database scripts using Entity Framework Model-First. To resolve this issue, use an ODAC version later than this release or reinstall ODAC 12c Release 3 with the "Configure ODP.NET at a machine-wide level" box UNchecked.
Add those nuget packages to you project:
EntityFramework (6.1.3 here)
Offical Oracle ODP.NET, Managed Entity Framework Driver (12.1.022 here)
Those will also add some dependent packages and insert the necessary configuration into the App.config.
Before generating the database, choose the correct T4 templates in the properties of the EDMX model before generating the database.
The pre-selected templates are designed for MS SQL Server (I guess).
I'm creating and WPF application using the MVVM in VS 2013; first implementation was with SQL server and it worked like a charm.
Second phase is to have support for Advantage Sybase. For this I have downloaded Advantage Data Provier to have the connection in connection drop down list ( http://www.codeguru.com/csharp/.net/article.php/c17027/Using-the-ADONET-Entity-Framework-with-the-Advantage-Database-Server.htm ).
For VS 2013 there is a problem with this and the workaround is to manually edit the registry to have this provider (http://blog.nwoolls.com/2012/07/25/registering-missing-data-providers-with-visual-studio-2012/).
Now I have the provider in the drop down, I can select the provider, but when I try to generate the script for data base generation I have a weird error:
ERROR:
"
Could not find the appropriate DbProviderManifest to generate the SSDL. The supplied provider Manifest token '2008' is not valid.
"
Any ideas on how to use the DB Provider correctly?
First, VS 2013 is not yet officially supported by Advantage Database Server. I believe official support may be available once ADS 12.0 is released.
But.... I did get a chance to try it out and it is working.
Be sure to that you are using the 11.1 ADS .Net dataprovider. It includes support for Entity Framework 5 (As far as In know, nothing from ADS includes support for EF6 at this time)
Export the 4 keys mentioned in your second article from Nate Wools. In my case I exported from VS 2012 (11.0 in the registry path). Full find/replace on 11.0 -> 12.0 including the assembly version for Microsoft.VisualStudio.Data.Framework
(Disclaimer, I've not had a chance to try MVVM, just a plain Windows Form app, but it worked well)
App.Config that was automatically created and updated. Maybe check against yours?
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" />
</startup>
<connectionStrings>
<add name="Entities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=Advantage.Data.Provider;provider connection string="Data Source=E:\ADS\School\School.add;User ID=adssys"" providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
</entityFramework>
</configuration>