I am trying to deploy an MVC app to an EC2 instance using Web Deploy, and everything is working until I try to run the application. I get the following error:
Parser Error Message: An error occurred creating the configuration section handler for entityFramework: Configuration for DbContext type 'Project.Modules.AppDbContext, Project' is specified multiple times in the application configuration. Each context can only be configured once.
I have looked all of the related issues I could find (error There is a duplicate 'entityFramework' section defined, There is a duplicate 'entityFramework' section defined - EntityFramework6 upgrade, The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception, The provider for invariant name System.Data.SqlClient is specified multiple times). It is an MVC app so there are multiple Web.config files, but the EF section it is complaining about doesn't exist in both places. Here are the relevant portions of my config file:
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
--------more config settings here---------
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework">
<parameters>
<parameter value="Data Source=MYIP;Initial Catalog=db;Persist Security Info=True;User ID=user;Password=password" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
I have heard anything from it should be resolved in 6.1.0 to many other things. If I remove the entry from the configSection it gives me another error about how it can't find the right resources. The only other thing that might be worth noting is that if I deploy and un-check 'Execute Code First Migrations' it just times out instead of giving me the above error.
Check web.config in root or parent folders of your app's virtual directory. The duplicate section error happens due to web.config inheritance.
wwwroot
|-- web.config <-- ensure this doesn't have any connection strings
|-- your app
|-- web.config <-- inherites wwwroot\web.config's settings
As vcsjones states in their answer here
The Problem is in your parent directory.Even if you specified one,there is already one in .config file.
Related
I'm trying to enable migrations but it's throwing an exception:
Checking if the context targets an existing database...
System.TypeInitializationException: The type initializer for 'System.Data.Entity.Migrations.DbMigrationsConfiguration`1' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception. ---> System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: The 'name' attribute must be specified on the 'section' tag.
I'm assuming that the App.config file is not correctly set up (it was automatically set up when I added EF package). All I did was add the connection string:
<?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>
<connectionStrings>
<add Name="MyContext" connectionString="data source=MYSERVER;initial catalog=CodeFirstTest;user id=***;password=***;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
</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>
I'm using SQL Server 2008 R2.
As I do have a connection string, I don't believe I need the defaultconnectionfactory. Am I correct? (Note: Even without this section I'm still getting the same exception)
What else am I missing?
I had the same issue when my <connectionString /> entry is on top part of the Web.config, Right after <configuration>. Then I tried moving it right before </configuration>, and it worked.
This is mainly to do with the config file. So the actual stack trace that helps is "System.Configuration.ConfigurationErrorsException".
There can be many reasons but they all majorly include the correction in the config file as answered earlier.
Couple of possibilities which are little different than this are given below (But the stack really tells us)
One possible out of the way reason can be that, your project where the migrations are getting enabled can be different from the startup project. So be sure to add -StartUpProject to your nuget commmand.
Version of the entity framework used can be different in case of two different projects.
I met with the same issue. My problem is that there are double connection string on the Web.config file. like as below:
<add name="DB1234" ..../>
<add name="DB1234" ..../>
So we have to check our web.config file first!
Good Luck!
check the spelling of your 'connectionString' and make sure it is 'connectionStrings' I omitted the 's' before in my own case.
After adding the 's', that solved it.
In my case I had several projects in the solution and another project was set as the StartUp project. Setting the project that I was trying to enable migrations for as the StartUp project resolved it.
In my case, using DevExpress MVC generated template, it need to add extra lines after <sectionGroup name="devExpress">...<sectionGroup/> in web.config
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
in my experiences, for example is that all the information that is used to establish a connection with the database is the one that comes from the config file that is in the startup-project, and not the one that is in the project where i am generating or using the enable-migrations or update-database instructions, example i have project PRINCIPAL and another project DATA,i use the DATA project as my default-project only when running the packages in Packager console Manager, but the config file that really use is the one in PRINCIPAL.
Include this into <configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
In my case this line is omitted when I have 2 instances of Visual Studio open.
Close all instances of the Visual Studio, open and reinstall EF via interface Nuget or Console to avoid this error
Check the webconfig, For example: I had the app settings like this:
<configuration>
<appSettings>
<add key="dhx_license" value="value"/>
</appSetting>
.....
and threw that error. But then I realized appSetting was duplicated below so I moved the and the error vanished. Thanks.
Like #Lester answer check web config. It must look like this:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
...
</configSections>
<appSettings>
...
</appSettings>
...
<configuration>
I had the same issue. But I found there are two <connectionString /> in my Web.config,
I had to remove one connection string and it work fine for me.
I have a ASP.NET WebAPI 2 project that uses Ninject as IoC. I have a core layer that all my Class Library projects use, and that defines common interfaces.
I have a layer called Repositories where I put my applications repositories, and a layer called DataLayer that defines the different Entity Framework DbContext objects. My Repositories layer has a reference to my DataLayer, and on both the DataLayer and the Repositories Layer I've added EntityFramework.
All repositories classed inside repositories layers are implementing common interfaces from the core, and are injected to the contollers in the API using ninject. At first, when I ran my project and tried to do something against the repository, I got the following error message:
An exception of type 'System.InvalidOperationException' occurred in EntityFramework.dll but was not handled in user code
Additional information: 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.
What I did next is open the app.config file in the repository layer and copy the EntityFramework defenitions to my web.config in the API project:
<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">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
but now I get the following error:
An exception of type 'System.InvalidOperationException' occurred in mscorlib.dll but was not handled in user code
Additional information: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.
I don't think that the solution is including the entity framework in the API references because that would break the separation of concerns - the API shouldn't care what technology is used by the repository to access the data - so that if lets say in a month I would like to change my ORM or even my db, the API should not care what and how I use, as long as it uses the same interfaces.
What is the problem then? I'm new to EF, so I figure I must be missing something...
Your Web Config definitely got messed up somewhere. I would try to delete the .edmx and try to add a new one. This is what my config looks like, not sure if it'll help.
<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>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" /> //did you change this here?
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
the API shouldn't care what technology is used by the repository to access the data
You have one application configuration file and one AppDomain. Both need the relevant Entity Framework configuration and assemblies to be loaded, because code in your DAL requires them.
The code of your web API shouldn't care, but the application configuration and hosting environment are separate from that.
Please try with installing the Entity framework again from Package Manager Console:
PM> Install-Package EntityFramework
This should solve your problem as the same issues was faced by me once.
Hope this works out.
Thanks
I have a WinForms project that uses EntityFramework 6.1.2-beta with .NET4, it worked fine, till I decided to replace EF assemblies with their source codes, for some tracing goals, so I removed EntityFramework.dll and EntityFramework.SqlServer.dll from my project references and get their source codes from CodePlex and add them to my solution.
I changed these new project configuration to DebugNet40(because my project works with .NET 4, but EntityFramework and EntityFramework.SqlServer projects work with .NET 4.5).
It compile successfully, but now when I want to run my project I get following error:
An unhandled exception of type 'System.IO.FileLoadException' occurred in Microsoft.VisualStudio.HostingProcess.Utilities.dll
Additional information: Could not load file or assembly 'EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. Strong name validation failed. (Exception from HRESULT: 0x8013141A)
It is my app.config file:
<?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" />
</configSections>
<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="ERPContext"
connectionString="Data Source=.;Initial Catalog=MyDb;
Persist Security Info=True;User ID=sa;password=*****"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
I removed PublicKeyToken=b77a5c561934e089" from app.config too, but the problem exists yet.
Is there any Idea?
The Entity Framework source code is configured to produce delay-signed assemblies (which means they're marked as "should be signed in the future with the official key"). The official instructions at Entity Framework's GitHub page show how to disable strong name validation (run the EnableSkipStrongNames task: build /t:EnableSkipStrongNames), so that you can use the delay-signed assemblies without anyone having to release their private key. This is sufficient for development systems.
If you intend to release a product relying on your custom-built modified Entity Framework DLLs, you should generate a new key, and modify the EF source code to use that new key.
You can right click the project in Visual Studio solution explorer, and Signing on the left and uncheck sign assembly. In your web config you will also need to remove the public key token.
After developing EF codefirst application locally,
I copied the database from localdb with generate scripts and create a new one at azure.
I added connection string to config file like this:
<?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" />
</configSections>
<connectionStrings>
<add name="DefaultConnection"
providerName="System.Data.SqlClient"
connectionString="Server=tcp:XXXXXXX.database.windows.net,1433;Database=XXXXXX;User ID=XXXXXXXXXXX;Password=XXXX;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;"/>
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
When I try to call an object, I get this exception:
"Invalid object name 'dbo.Banner'."
DB connection is correct. I can connect with SQL Server Management Studio.
What is wrong with this code?
Does the manually creating DB cause the problem?
This problem happen specially when you are restoring database to another server and if you have changed the databse username.
To solve this problem the best way is to change all SCHEMA to dbo.
To change SCHEMA execute following code through your MSSQL Enterpeise manager
ALTER SCHEMA dbo TRANSFER oldSchema.TableName
It seems that the tables has not been created.
Some pointers:
Did you enable Automatic Migration?
AutomaticMigrationsEnabled = true;
You maybe prefer doing a manual update/creation?
In that case, select a project containing the configuration that points to your Azure DB and in the Package Manager console:
update-database
Or you can do it in code as well using the MigrateDatabaseToLatestVersion initializer class.
Here are some additional information for reference:
- MSDN: Code First Migrations
- ASP.NET: Code First Migrations and Deployment with the Entity Framework in an ASP.NET MVC Application
I am writing a C# application which uses SQL Server CE 4.0 files, which are accessed through the Entity Framework 6.0 via code-first. (The application needs to be able to use local dll's for the SQL Server CE connection i.e. the application needs to be XCOPY deployable). The application runs fine on my development machine, but on other machines (e.g. VMs with just Win7 and .NET 4.0), I get an ArgumentException:
The ADO.NET provider with invariant name 'System.Data.SqlServerCe.4.0' is either not registered in the machine or application config file, or could not be loaded. See the inner exception for details.
The inner exception message says:
Unable to find the requested .Net Framework Data Provider. It may not be installed.
I have searched Google and SO and most of the comments indicate ensuring the App.config file is correct. I believe mine is (default connection factory and provider sections), but here are the contents:
<?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" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlCeConnectionFactory, EntityFramework">
<parameters>
<parameter value="System.Data.SqlServerCe.4.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SqlServerCe.4.0" type="System.Data.Entity.SqlServerCompact.SqlCeProviderServices, EntityFramework.SqlServerCompact" />
</providers>
</entityFramework>
</configuration>
The build folder includes the following files (in addition to the application-specific files, of course):
EntityFramework.dll
EntityFramework.xml
EntityFramework.SqlServer.dll
EntityFramework.SqlServer.xml
EntityFramework.SqlServerCompact.dll
EntityFramework.SqlServerCompact.xml
In each of the amd64 and x86 subfolders are the following files:
sqlceca40.dll
sqlcecompact40.dll
sqlceer40EN.dll
sqlceme40.dll
sqlceqp40.dll
sqlcese40.dll
I am certain the program runs on the development machine because SQL Server CE has been installed, but how do I get it to run using just local SQL Server CE dll's on other machines?
See http://tech.aendeavors.com/2011/06/09/bin-deploy-sqlce-4-0-and-ef-4-1/
It seems the relevant bits you might be missing are:
Make sure System.Data.SqlServerCe is referenced and set to "Copy
local" in properties.
Add the following to app.config:
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SqlServerCe.4.0" />
<add name="Microsoft SQL Server Compact Data Provider 4.0"
invariant="System.Data.SqlServerCe.4.0"
description=".NET Framework Data Provider for Microsoft SQL Server Compact"
type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"/>
</DbProviderFactories>
</system.data>
I was facing the same problem today.
After reinstalling EF several times, what solved my problem was referencing EF in my Console project along with the DAL project (the one that actually uses EF).
If you're using a reference that in turn references EF, you gotta add it to this project as well.
Sorry about the late response - actually, there's a really simple solution:
If you investigate the packages\EntityFramework.6.1.3\lib\net45 folder, you'll notice that there's another dll that's already in there - EntityFramework.SqlServer.
Simply add a reference to that, and everything will work.
I had the same issue and nothing worked for me. The only thing that resolved my this issue for me was to uninstall SQL Server Compact from my machine (via add/remove programs) and re-install it.
In my case, "EntityFramework.SqlServerCompact" package was missing. Just wanted to share if in case it can save someone's day!