I'm trying to use Entity Framework with SQLite. I had issues integrating it into my main application, so I started a little test from scratch, exactly following the directions on http://brice-lambson.blogspot.com/2012/10/entity-framework-on-sqlite.html
After all is said and done, I get the following error when running the project:
No Entity Framework provider found for the ADO.NET provider with
invariant name 'System.Data.SQLite'. 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.
My app.config looks 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" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<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>
<system.data>
<DbProviderFactories>
<add name="SQLite Data Provider"
invariant="System.Data.SQLite"
description="Data Provider for SQLite"
type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
</DbProviderFactories>
</system.data>
<connectionStrings>
<add name="ChinookContext"
connectionString=
"Data Source=|DataDirectory|Chinook_Sqlite_AutoIncrementPKs.sqlite"
providerName="System.Data.SQLite" />
</connectionStrings>
</configuration>
Then I saw his post about Entity Framework 6. While it wasn't the exact error I was getting, I tried installing his updated provider via NuGet. The error was gone, but replaced with this one:
Could not load file or assembly 'System.Data.SQLite.Linq,
Version=2.0.88.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139' or
one of its dependencies. The located assembly's manifest definition
does not match the assembly reference. (Exception from HRESULT:
0x80131040)
Additionally, my app.config got changed (slightly) to 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" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.SQLiteProviderServices, System.Data.SQLite.Linq, Version=2.0.88.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description="Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
<remove invariant="System.Data.SQLite" />
</DbProviderFactories>
</system.data>
<connectionStrings>
<add name="ChinookContext" connectionString="Data Source=|DataDirectory|Chinook_Sqlite_AutoIncrementPKs.sqlite" providerName="System.Data.SQLite" />
</connectionStrings>
</configuration>
I've tried everything I can think of to address these errors, nothing has worked. I've tried using the other SQLite binaries; I've tried manually editing the SQLite project to use the EF version 6; I've changed the architectures, I've added and removed the nuget packages over and over, etc.
I have no idea where to go from here.
Just thought I'd share another way to configure EF6 with SQLite without using app.config / web.config. EF6 now supports code based configurations as outlined here on msdn. I used the following code (updated to remove reflection thanks to Sly):
public class SQLiteConfiguration : DbConfiguration
{
public SQLiteConfiguration()
{
SetProviderFactory("System.Data.SQLite", SQLiteFactory.Instance);
SetProviderFactory("System.Data.SQLite.EF6", SQLiteProviderFactory.Instance);
SetProviderServices("System.Data.SQLite", (DbProviderServices)SQLiteProviderFactory.Instance.GetService(typeof(DbProviderServices)));
}
}
I use this so I can inject the correct DbContext and hence DbProvider at runtime and don't need everything configured in the main assembly.
Edit:
As Reyn said you will also need to add an IDbConnectionFactory for SQLite if you wish to have your connection string in your web.config / app.config file. Another approach is to call a different base constructor from your DbContext which passes in a new SQLiteConnection rather than the connection string, as shown in this answer.
I know this is an old question, but no one seems to have provided an answer that actually uses the .config file. Here is the system.data and entityframework sections of my web.config that allows connections to both SQLServer and Sqlite databases:
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)"
invariant="System.Data.SQLite.EF6"
description=".NET Framework Data Provider for SQLite (Entity Framework 6)"
type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite"
description=".Net Framework Data Provider for SQLite"
type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
</DbProviderFactories>
</system.data>
<entityFramework>
<providers>
<provider invariantName="System.Data.SQLite.EF6"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
Based on magicandre1981's comment, I began to look more closely at the syntax of the provider node. I found that my assembly was a different version than what was specified in the type attribute, though I had not inserted or touched that particular line. By deleting the strong naming, I got .Net to load the library. For reference, here's the new line:
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.SQLiteProviderServices, System.Data.SQLite.Linq" />
That put me back on track and I was able to match my results with the ones on the blog.
I feel compelled to note, however, that I have decided that SQLite is not a good fit for the Entity Framework, as too many critical functions are missing. I switched over to SQL Server Compact Edition, which I installed via NuGet. A simple tweak to my Connection String and I was running with the full power of Entity Framework. It took less than a minute, compared to the multi-hour slog that was SQLite. I'd recommend switching databases if possible, System.Data.SQLite just isn't ready for the Entity Framework.
For anyone using the code based setup and still getting the same exception: I needed to additionally set the connection factory in kjbartel's answer.
public class SQLiteConnectionFactory : IDbConnectionFactory
{
public DbConnection CreateConnection(string nameOrConnectionString)
{
return new SQLiteConnection(nameOrConnectionString);
}
}
Then set the default connection factory in SQLiteConfiguration
public class SQLiteConfiguration : DbConfiguration
{
public SQLiteConfiguration()
{
SetDefaultConnectionFactory(new SQLiteConnectionFactory());
SetProviderFactory("System.Data.SQLite", SQLiteFactory.Instance);
SetProviderFactory("System.Data.SQLite.EF6", SQLiteProviderFactory.Instance);
Type t = Type.GetType( "System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6");
FieldInfo fi = t.GetField("Instance", BindingFlags.NonPublic | BindingFlags.Static);
SetProviderServices("System.Data.SQLite", (DbProviderServices)fi.GetValue(null));
}
}
Related
It seems this error is really common when trying to make SQLite connections with ADO.NET, but yet I cannot find any answer to it.
This error occurs when I try to make an ADO.NET connection to my SQLite database. People says its somewhat related to .NET Framework, but I've tried reinstalling all and nothing, it even happens in my other computer.
My .config looks like this
<?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>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" /><add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" /></DbProviderFactories>
</system.data>
</configuration>
The steps I've made since now are:
Installing the SQLite and EF6 from nugget package
Installing SQLite extension
Instaling SQLite for .NET Framework 4 x64 from SQLite page
I don't know what to do, HELP PLEAE
I am writing WinForms application in Visual Studio 2017. I am using SQLite Database because my program should work without Internet connection and no option to install SQL Server. This program going to be used by common people and they will be given only .exe file to work with. So when my application opening I need to check if SQLite database exist if not it must be created. Problem is when I delete database and try following code:
if (!System.IO.File.Exists(#"C:\Users\USR-pc\Desktop\test.db"))
{
SQLiteConnection.CreateFile(#"C:\Users\USR-pc\Desktop\test.db");
mainEntities db = new mainEntities();
db.Database.Create();
db.Database.Initialize(true);
}
And I get error No Entity Framework provider found for the ADO.NET provider with invariant name Devart.Data.SQLite. Make sure the provider is registered in the 'entityFramework' section of the application config file. App.config:
<?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=v4.6.1" />
</startup>
<connectionStrings>
<add name="mainEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=Devart.Data.SQLite;provider connection string="Data Source=C:\Users\USR-pc\Desktop\test.db"" providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v13.0" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" /><add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" /></DbProviderFactories>
</system.data>
</configuration>
I downloaded dcsqlite.exe and Installed it. After using NuGet I installed SQLite to my project. After that I built Ado.net entity model using entity framework. From this model I want to create new database if it does not exist.
I'm setting up a solution containing two projects: 1) my class library and 2) my web UI. Ultimately the website will be used to show query results from an existing mysql database.
I struggled to create the ado.net entity model for a while. But I thought I had figured it out after updating the mysql connector for visual studio and following the instructions here: https://dev.mysql.com/doc/connector-net/en/connector-net-entityframework60.html
Now that the entity model is created I am struggling to create a simple controller with scaffolding. I've double checked my connection string and ef provider in web.config and app.config.
I've looked through these questions but have not found my answer:
Exception has been thrown by the target of an invocation- while creating the controller
Application can't scaffold items
Enity Framework With MySQL
I'm pretty sure the issue is in how I have configured it. For a while I thought that what is in app.config didn't matter because the UI project (containing web.config) was set as the startup project. Now I'm just confused. Which is why I have included both below. Any insight is greatly appreciated.
From web.config:
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\aspnet-MySolution.UI-20161111094519.mdf;Initial Catalog=aspnet-MySolution.UI-20161111094519;Integrated Security=True"
providerName="System.Data.SqlClient" />
<add name="MySolutionEntities" connectionString="metadata=res://*/Entities.DevData.csdl|res://*/Entities.DevData.ssdl|res://*/Entities.DevData.msl;provider=MySql.Data.MySqlClient;provider connection string="server=****;user id=****;password=****;database=mydatabase""
providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6" />
<provider invariantName="System.Data.MySqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFrameworkSqlServer" />
</providers>
</entityFramework>
From app.config:
<?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>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient"
type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6" />
<provider invariantName="MySql.Data.SqlClient"
type="MySql.Data.Entity.SqlServer.ProviderServices, EntityFramework.SqlServer"/></providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="MySql.Data.MySqlClient" />
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
<connectionStrings>
<add name="MySolutionEntities" connectionString="metadata=res://*/Entities.DevData.csdl|res://*/Entities.DevData.ssdl|res://*/Entities.DevData.msl;provider=MySql.Data.MySqlClient;provider connection string="server=****;user id=****;password=****;database=mydatabase""
providerName="System.Data.MySqlClient" />
</connectionStrings>
</configuration>
Late answer but I hope it helps somebody
I had same problem, I just solve it by uninstalling and reinstalling entity-framework through the nuget package manager console.
o Run Package Manager Console :
Tools -> NuGet Package Manager -> Package Manager Console
To Remove:
UnInstall-Package EntityFramework
To Reinstall:
Install-Package EntityFramework
I hope this works for you as well
Ok I'm not exactly sure how I solved this problem but I figured that I should try to describe it. I started over my solution in the same way and created the entity model. Then instead of using the code in the providers tag from that article at dev.mysql.com (link above) I found this in my app.config:
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
</providers>
I copied the same thing over to my web.config. Then I was able to create the controller with scaffolding.
After 8 hours of struggle debugging EFPowerTools, I found at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\PrivateAssemblies was Mysq.Data and Mysql.Data.Ef6 which were a diffrent version [6.9.8] from the ones in my web config [6.10.9] i copied the versions in my bin 6.10.9 to the above PrivateAssemblies folder and every thing worked fine.
I want to use EF6 with Sqlite. I follow up the instruction I found here: http://erikej.blogspot.de/2014/11/using-sqlite-with-entity-framework-6.html
If I now add a new entity model I get some strange error and I found nothing on the Internet to resolve it. :(
Translated it means some think like:
"The SelectCommand-Property has not been init befor the call of: 'Fill'."
I checked all references and all NuGet packages are up to date.
Here is my current 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" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
</DbProviderFactories>
</system.data>
</configuration>
Somebody knows more about it? Please help.
Regards Steffen
I'm working on a project that involves connecting SQLite with EF 6 in a database-first approach. I've installed System.Data.SQLite (and ensured that their DLLs were in the GAC), and added the dependencies to my project using NuGet. However, when I attempt to create a schema (via the Entity Data Model Wizard) for an already-existing database, I get the error
Your project references the latest version of Entity Framework; however, an Entity Framework database provider compatible with this version could not be found for your data connection. Exit this wizard, install a compatible provide, and rebuild your project before performing this action.
I've tried the answers in this thread, but the fixes that did not involve creating the DAO classes by hand do not seem to help. Since the database that I'm connecting to is quite large (schema-wise), recreating the schema in code is not reasonable for me.
My App.config follows.
<?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=v4.5.1" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6, Version=1.0.91.0, Culture=neutral" />
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6, Version=1.0.91.0, Culture=neutral" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".Net Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".Net Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
</DbProviderFactories>
</system.data>
</configuration>
I don't entirely understand what VS is complaining about, as it appears that System.Data.SQLite has properly bound itself into VS, and that the config file contains the requisite information to allow VS to find it to access the DB. However, I missed something, and I can't figure out what.
This is my application configuration that was successful for me.
<?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>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".Net Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".Net Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
</DbProviderFactories>
</system.data>
</configuration>
THIS project also references an identical configuration to my own.