i'm following the MySql tutorial to entity framework as listed here: https://dev.mysql.com/doc/connector-net/en/connector-net-entityframework60.html
I have installed in my project via NuGet:
- Entity Framework v6.2.0
- MySql.Data.Entity v6.10.7
And their corresponding dependencies.
I have installed the MySql CONNECTOR/NET v8.0.11.
I added the provider and connectionString to the App.config:
<entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.10.7.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</providers>
</entityFramework>
<connectionStrings>
<add name="mysql" connectionString="Server=localhost,3306;Database=eneagramas;Uid=root;Pwd=1234;" providerName="MySql.Data.MySqlClient" />
</connectionStrings>
Basically i followed all the instructions in the official documentation, this is my context class:
class MyContext : DbContext
{
public MyContext() : base("mysql")
{
//nothing here
}
public DbSet<Humans> Humans { get; set; }
}
YET i get this error when accesing the DB:
System.Data.Entity.Core.ProviderIncompatibleException
HResult=0x80131501
Message=The provider did not return a ProviderManifestToken string.
Source=EntityFramework
StackTrace:[...]
Inner Exception 1:
MethodAccessException: Attempt by method 'MySql.Data.MySqlClient.MySqlProviderServices.GetDbProviderManifestToken(System.Data.Common.DbConnection)' to access method 'MySql.Data.MySqlClient.MySqlConnection.get_Settings()' failed.
I checked my DB credentials, they are fine
The server is up and running
The database im trying to use exists
You can't use MySql.Data 8.0.11 with MySql.Data.Entity 6.10.7; the major versions are incompatible.
Oracle renamed the package to MySql.Data.EntityFramework for v8. Uninstall MySql.Data.Entity and install MySql.Data.EntityFramework instead.
Related
Recently my web host decided to switch to MariaDB from MySQL. Since then, I get the following error whenever a page tries to connect to the database. "Versions of MySQL prior to 5.6 are not currently supported". I'm using ASP.NET MVC, with Entity First, with the following packages installed MySql.Data 8.0.28, MySql.Data.Entities 6.8.3, MySql.Data.EntityFramework 8.0.28, MySqlConnector 2.1.8. They are all up-to-date as of writing this.
My web.config file has the following:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="MySql.Data.MySqlClient"
type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.EntityFramework"/>
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, 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=8.0.28.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
</entityFramework>
I have tried looking and cannot find much on this error. I'm not sure if this would be something on the host's end or something I can fix on my end since all of the packages are up-to-date.
At the time of writing, versions of MySql.Data from 8.0.22 to the current 8.0.29 are affected by this problem, and will not connect to MariaDB. This is tracked in Bug #107452.
The current workaround is to use version 8.0.21
As a bug mentioned by #Richard, There is a workaround to pass this error.
It actually is a bug of MySql.Data package where there is a wrong version parsing and comparing if the minor number has 2 digits.
So all you need is to set the version number (to 9.9.0 for example) in the my.ini file:
Restart the MariaDB server,
Done!
Until recently, I used a MySQL database with Entity Framework. I have migrated this database to SQL Server.
For some reason however, Entity Framework still tries to use the MySQL provider for EF:
MetadataException: Schema specified is not valid.
Errors: (0,0) : error 0175: The ADO.NET provider with invariant name 'MySql.Data.MySqlClient' is either not registered in the machine or application config file, or could not be loaded. See the inner exception for details.
What I've tried so far:
I have removed every dependency and reference to MySQL and it's provider, including any NuGet packages
I've completely removed and re-installed Entity Framework
Obviously, I changed my connection string
I've even cleared all my app.config files (it's a WPF application) and reinstalled EF to start with a clean configuration
If I search my entire solution for MySQL, no results can be found. Still, this error occurs.
What could still cause this error?
My app.config (in case it matters):
<?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="sqlservercon"
connectionString="Data Source=<url>;Initial Catalog=<dbname>;User Id=<user>;Password=<pw>;"
providerName="System.Data.SqlClient" />
</connectionStrings>
<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>
</configuration>
Context:
public class CustomContext : DbContext
{
public DbSet<Member> Members { get; set; }
...
public CustomContext()
: base("name=sqlservercon")
{
}
}
I am trying to setup a existing project to use Entity Framework. I have never used it before and want to learn it on a personal project.
I have a solution with many projects, all related. Login is where I wanna do querys. Model is where the model is. Main is where the program starts.
I have installed EntityFramework onto MySolution.Model.
This is the app.config for Model:
<connectionStrings>
<add name="ALDatabaseContext" providerName="MySql.Data.MySqlClient"
connectionString="server=localhost;port=3306;database=aldatabase;uid=root;password=root"/>
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>
<providers>
<provider invariantName="MySql.Data.MySqlClient"
type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6"/>
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
</providers>
</entityFramework>
My context is very simple
public class ALDatabaseContext : DbContext
{
public virtual DbSet<User> Users { get; set; }
}
But when I call context from Login I get an exception:
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.
What I am missing?
Ok, I managed to get it working (but I don't like the solution).
I have added this to the app.config of Main (the entry point of my solution):
<connectionStrings>
<add name="ALDatabaseContext" providerName="MySql.Data.MySqlClient" connectionString="server=localhost;port=3306;database=aldatabase;uid=root;password=root" />
</connectionStrings>
<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="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
</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>
And also referenced all dlls of Model (Entity framework related dll and Mysql dlls) at Login and Main projects.
I have ASP.Net MVC site where I am using MySqlas database with Entity Framework
When running the following command on Nuget Package Manager Console
Enable-Migrations -force
Getting the error
Type is not resolved for member 'MySql.Data.MySqlClient.MySqlException,MySql.Data, Version=6.8.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d'
Here is how my Web.Config looks like.
<connectionStrings>
<add name="mb_databaseContext" providerName="MySql.Data.MySqlClient" connectionString="Server=.\localhost;port=8080;database=myDb;uid=root;password=" /></connectionStrings>
<entityFramework>
<defaultConnectionFactory type="MySql.Data.Entity.MySqlConnectionFactory, MySql.Data.Entity.EF6" />
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6" />
</providers>
Please note MySql is running as
localhost:8080/phpmyadmin
Solution
You probably need to install the MySql connector, I did that and it worked.
Download Connector/Net
I have a problem using Entity Framework 6 with MySQL and doing so using model/database-first technique in ASP.NET C# MVC 3.
The current situation is that I’m getting the error:
Keyword not supported.
Parameter name: metadata
The metadata is specified in the connection string in the web.config –file:
<add name="SiteNameContainer"
connectionString="metadata=res://*/Models. SiteName.csdl|
res://*/Models. SiteName.ssdl|
res://*/Models. SiteName.msl;
provider=MySql.Data.MySqlClient;
provider connection string='server=127.0.0.1;
user id=fire;password=fire_db;
database=fire_dotnet'"
providerName="MySql.Data.MySqlClient" />
I tried to remove the metadata-section in the connectionString, but then its saying that the keyword “provider” is not supported, and then “provider connection string” not supported.
I also have these 2 sections in my web.config file:
<entityFramework>
<providers>
<provider invariantName="MySql.Data.MySqlClient"
type="MySql.Data.MySqlClient.MySqlProviderServices,
MySql.Data.Entity.EF6, Version=6.8.3.0,
Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<clear />
<remove invariant="MySql.Data.MySqlClient" />
<add name="MySql.Data.MySqlClient"
invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory,
MySql.Data, Version=6.8.3.0, Culture=neutral,
PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
I have references to MySQL Net-connector 6.8.3 files (MySql.Data, MySql.Data.Entity.EF6, MySql.Web).
My requirments are that I must use MySQL and Entity Framework 6, and the changelog for the .NET connectior says that 6.8.x added support for MySQL.
I’m out of ideas, hopefully someone can help me with this. Thanks in advance.
It seems like you may be using the wrong providerName in your connection string, it should be System.Data.EntityClient.
Here's how I finally got my model-first code to work with MySQL and what my app.config looks like:
<connectionStrings>
<add name="MyEntities"
connectionString="metadata=res://*/Data.Entity.Model.csdl|res://*/Data.Entity.Model.ssdl|res://*/Data.Entity.Model.msl;provider=MySql.Data.MySqlClient;provider connection string="Data Source=localhost;User Id=dbadmin;Password=password;Initial Catalog=database_name;""
providerName="System.Data.EntityClient"/>
</connectionStrings>
In case that doesn't work, here's the entityFramework section. You'll notice the codeConfigurationType attribute I used in the following section. It is adds dependency resolvers for MySQL, but there are other ways of doing it which you can read about in the MySQL: EF 6 Support documentation.
<entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6"/>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
</providers>
</entityFramework>