I downloaded MySQL Connector/Net 6.7.4 and MySQL for Visual Studio 1.0.2, and then followed these instructions to test it:
Create a connection to the existing MySQL database.
Create a console application.
Add the ADO.NET Entity Data Model from the existing database connection.
Add Code Generation Item EF 5.x DbContext Generator, replacing the .tt files.
Write some code that retrieved records from the database.
Running the application, I got this exception:
ConfigurationErrorsException: Failed to find or load the registered .Net Framework Data Provider.
Then I added references to the MySql.Data and MySql.Data.Entity libraries version 6.7.4.0 to my .NET 4.5 project. Now when I run the application, I get a different exception:
FileLoadException: Could not load file or assembly 'MySql.Data, Version=6.6.5.0,culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Note the version number, which is not the version of MySQL Connector that I have installed.
How do I get it working correctly?
The trick to solving this was:
Add references to the MySql.Data and MySql.Data.Entity libraries of the correct version (6.7.4.0 for .NET 4.5, in my case) to the project.
Edit machine.config with your editor run as administrator, and replace all occurences of MySQL version 6.6.5.0 by 6.7.4.0.
For the second step, note that there are multiple machine.config files, one for each framework version (3.0, 3.5, 4.0) and architecture (32-bit, 64-bit). Also note that the machine.config file for .NET 4.5 is in the .NET 4.0 folder. You can find the machine.config files in:
C:\Windows\Microsoft.NET\Framework\\Config
And:
C:\Windows\Microsoft.NET\Framework64\\Config
If there are no references to MySQL in the machine.config file, you might not have installed MySQL for Visual Studio. Either do that, or add the following to the app.config file of your project:
<system.data>
<DbProviderFactories>
<add name="MySQL Data Provider"
invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.7.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
Note however, that when you both install MySQL for Visual Studio and add the above snippet to your app.config file, then you'll get this exception:
ConfigurationErrorsException: Column 'InvariantName' is constrained to be unique. Value 'MySql.Data.MySqlClient' is already present.
I don't like to edit machine.config. Just add this redirect to web.config:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-6.6.5.0" newVersion="6.7.4.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
Using this should stop the exception that Virtlink mentioned:
<system.data>
<DbProviderFactories>
<remove name="MySQL Data Provider" />
<add name="MySQL Data Provider"
invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.7.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
Especially note the <remove name="MySQL Data Provider" /> line.
Download MYSQL 6.7.4.0 from HERE . Notice that your specific problem requires 6.7.4.0 and NOT other version !
Direct link is this .
Download and add the files to the reference folder of your solution .
This would probably solve your problem (it did for me , and yes , I know this can by a very annoying problem) .
Good luck :)
I realise this thread had an answer back in 2013 but I have just encountered this problem again. In my situation, I recently installed the Windows 10 Anniversary update. Didn't have an issue before this.
As per the answers above, it turns out my Machine.config file had been overwritten (I presume by the update).
For me once I restored the MySql Assembly information to the Machine.config file, it immediately started working again.
In particular the "Runtime" and "DbProviderFactories" sections had been wiped and had to be replaced. They were as follows (these will vary depending on the versions of the assemblies you are using):
Runtime Section:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly xmlns="urn:schemas-microsoft-com:asm.v1">
<assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
<bindingRedirect oldVersion="6.7.4.0" newVersion="6.9.9.0" />
</dependentAssembly>
<dependentAssembly xmlns="urn:schemas-microsoft-com:asm.v1">
<assemblyIdentity name="MySql.Data.Entity" publicKeyToken="c5687fc88969c44d" culture="neutral" />
<bindingRedirect oldVersion="6.7.4.0" newVersion="6.9.9.0" />
</dependentAssembly>
<dependentAssembly xmlns="urn:schemas-microsoft-com:asm.v1">
<assemblyIdentity name="MySql.Web" publicKeyToken="c5687fc88969c44d" culture="neutral" />
<bindingRedirect oldVersion="6.7.4.0" newVersion="6.9.9.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
DbProviderFactories Section
<DbProviderFactories>
<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>
Hope this helps anyone else coming across the same problem.
Related
Error:
An unhandled exception of type 'System.IO.FileLoadException' occurred in WindowsFormsApplication4.exe
Additional information: Could not load file or assembly 'MySql.Data, Version=8.0.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. Strong name validation failed. (Exception from HRESULT: 0x8013141A)
Information:
Visual Studio 2015
Windows 10 - x64
C#
MySQL 6.9.9
Problem:
I've made a class library using MySQL to run various queries to my online database.
After including the dll in my separate project, the only line of code I'm using is the following: (which it throws the exception on)
// Runs a simple select statement to find matches for 'John Doe' in my online MySQL database table... and stores results to a dataset
DataSet ds = MyDllNameSpace.Database.People.Load("John", "Doe");
App.Config files:
My dll project: (I did NOT sign this project)
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<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=8.0.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data></configuration>
My separate project: (I did NOT sign this project)
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-8.0.8.0" newVersion="8.0.8.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
What I've searched/tried:
Made sure to use the same version of MySQL in both projects
Put the dll to both my library and MySQL in the bin folder of my separate project and adding them as a reference
Also tried adding both dlls of my library and MySQL to the separate project and selecting 'always copy'
Changing around the App.config file (assuming the issue is in here?)
Lastly, I tried signing both the dll project, and the project using the dll with the same password (checking sign the assembly). This also did nothing. :(
Thank you
Have you tried signing the project(s)? That may remove your error.
Maybe this link about your error will help: https://blogs.msdn.microsoft.com/keithmg/2012/03/20/strong-name-validation-failed-exception-from-hresult-0x8013141a/
or this stackoverflow question:
Strong Name Validation Failed
I have prepared WPF app which connects to SQLite database.
My application is not organized into layered and I wanted to separate DAL - data access layer into separated project.
I have a problem with connection to database.
Should connection be defined in DAL dll app.config or in WPF app app.config?
Where should I store my sqlite database file?
Could you give good practice example?
I think such connection should be defined outside DLL but in such case I have a problem with defining that connection.
Entity Framework will look in the App.config of your main project for the SQLite connection string, so you'll want to put it there. Personally, I think the code should be independent of the connection string, since you may have different database copies for different needs.
If you have tests (which you should), they will probably point to a different test database than the actual application. The databases have the same structure, and the code should all behave the same, they just have different connection strings.
I personally prefer to keep all the config in one file; but, ultimately, it really depends on how you see the DAL dll being used. Think what might change and how the modules might get used.
Ex:
If you have multiple applications and you want them all share the same database, maybe putting it in the DAL config would make the most sense as if/when the connection string changes, you only have to change it in one place.
If this is to be a interface used by multiple different databases, the app config would make more sense as you don't want updates to DAL to push on top of the application's choice.
I have the same exact configuration: Entity Framework model with a DAL in a separate DLL. What I did was I created an app.config file in the DAL DLL project. This app.config file has all of the stuff that is needed for EF to use the SQLite provider, but no connection string.
Here is the app.config for the DAL DLL:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Data.SQLite" publicKeyToken="db937bc2d44ff139" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-1.0.97.0" newVersion="1.0.97.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
<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" />
</DbProviderFactories>
</system.data>
<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>
<providers>
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
</configuration>
I think this is all needed in the DLL for it to be able to be built.
The main program also has an app.config and references the DAL DLL project. Its app.config defines the connection string for accessing the database (which was created by the Entity Framework model wizard when I created the model). It also has all the other stuff and other things that are needed in my application.
Here's what that app.config looks like, with all of my app's specific stuff removed:
<?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" />
<!-- More stuff here for my app in particular . . . -->
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<connectionStrings>
<remove name="SQLiteConnection" />
<remove name="EntitiesConnection" />
<add name="SQLiteConnection" connectionString=". . ." />
<add name="EntitiesConnection" connectionString=". . ." />
</connectionStrings>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
</startup>
<system.data>
<!--
NOTE: The extra "remove" element below is to prevent the design-time
support components within EF6 from selecting the legacy ADO.NET
provider for SQLite (i.e. the one without any EF6 support). It
appears to only consider the first ADO.NET provider in the list
within the resulting "app.config" or "web.config" file.
-->
<DbProviderFactories>
<remove invariant="System.Data.SQLite" />
<add invariant="System.Data.SQLite" name="SQLite Data Provider" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite, Version=1.0.97.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
<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, Version=1.0.97.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
</DbProviderFactories>
</system.data>
<!-- Ohter stuff particular to my app -->
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Data.SQLite" publicKeyToken="db937bc2d44ff139" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-1.0.97.0" newVersion="1.0.97.0" />
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>
The main program makes no database calls. Every database access is done through the code in the DAL dll.
Okay, this one is really puzzling me, and I apologize if the title of the question doesn't accurately describe what my problem is.
I have a program made in C#, using Entity Framework and SQL Server CE. I developed it on Windows 7, and it works fine. I also have a Windows 8.1 machine that I've tested it on, and it works fine on that too.
However, on a few Windows 8.1 computers, the program crashes as soon as it tries to access the database. I get the following error:
Unhandled Exception: System.InvalidOperationException: No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlServerCe.3.5'. 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.
Now, this really confuses me, because I have the latest NuGet package for SQL Server CE installed on my project (4.0). I used the SQL Server CE toolbox to explicitly create a SQL Server CE 4.0 database, I distributed the 4.0 dll's with the application, and I explicitly have version 4.0 listed in my app.config file (invariantName="System.Data.SqlServerCe.4.0").
So, why does the error say System.Data.SqlServerCe.3.5? Why does this error only occur on a couple of Windows 8.1 machines?
(I also searched through my entire solution, and the text "3.5" doesn't even appear anywhere.)
I found similar errors, and I tried (from this question) to include this:
private volatile Type _dependency;
public MyClass()
{
_dependency = typeof(System.Data.Entity.SqlServer.SqlProviderServices);
}
Has no effect, I still get the same exact answer.
Anyways, if anybody has any ideas, I would greatly appreciate any kind of input.
I think problem is both SQL Server CE components installed in your system.
My solution :
<DbProviderFactories>
<remove invariant="System.Data.SqlServerCe.3.5" />
<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=4.0.0.1, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
</DbProviderFactories>
I had the same issue and solved it based on this link.
Find this section in your App.config:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Data.SqlServerCe" publicKeyToken="89845dcd8080cc91" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-4.0.0.1" newVersion="4.0.0.1" />
</dependentAssembly>
</assemblyBinding>
</runtime>
And change oldVersion="0.0.0.0-4.0.0.1" to oldVersion="4.0.0.0-4.0.0.1"
Check your config file and add an Entry for the DbProviderFactories like this:
<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>
Take a look at your project references, you may be referencing to the wrong dll
I'm doing asp.net mvc3, and I have a problem with ODP.NET, Oracle.DataAccess.
Whenever I try to do my unit test, it throws a FileNotFoundException.
I thought I've installed and been using Oracle.DataAccess v4.112.3.0, but my application keeps looking for 'Oracle.DataAccess, Version=4.121.1.0'.
Still I can find 'Oracle.DataAccess v4.112.3.0' in my GAC and through the FusionLog I found belows in my machine.config. So I guess there are some version conflict of ODP.NET.
<system.data>
<DbProviderFactories>
<add name="Oracle Data Provider for .NET" invariant="Oracle.DataAccess.Client" description="Oracle Data Provider for .NET" type="Oracle.DataAccess.Client.OracleClientFactory, Oracle.DataAccess, Version=4.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
<add name="ODP.NET, Managed Driver" invariant="Oracle.ManagedDataAccess.Client" description="Oracle Data Provider for .NET, Managed Driver" type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.112.3.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
<add name="Microsoft SQL Server Compact Data Provider" invariant="System.Data.SqlServerCe.3.5" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=3.5.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
</DbProviderFactories>
So, I've tried to modify the version in the machine.config but it didn't work.
Anyone can help me to fix this?
You can always force a specific version with a runtime redirect in web.config (or machine.config), provided the Oracle dll's interface across versions has stayed the same:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="Oracle.DataAccess" publicKeyToken="89B483F429C47342"/>
<bindingRedirect oldVersion="4.121.1.0" newVersion="4.112.3.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
From my experience this trick has worked when redirecting from 10.1 to any newer version, but once we ran in mysterious errors when trying to redirect backward (see this), therefore I advise you to better find the exact reason why this is happening - look in your *.csproj which Oracle.DataAccess exactly is referenced and/or disassemble your binaries to inspect also the references of referenced libraries. (It is possible that rather than your code some 3rd party lib you use wants this exact version of ODP.NET).
I am not able to get asp.net mvc5 identity to work with mysql. Here is the web.config part .Could it be beacuse of EF6 not working with mvc5 ?
<system.data>
<DbProviderFactories>
<remove name="MySQL Data Provider"/>
<add name="MySQL Data Provider"
invariant="MySql.Data.MySqlClient"
description=".Net Framework Data Provider for MySQL"
type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
entityFramework>
<defaultConnectionFactory type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data" />
<providers>
<provider invariantName="MySql.Data.MySqlClient"
type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity" />
</providers>
</entityFramework>
The error is :
Additional information: The 'Instance' member of the Entity Framework
provider type 'MySql.Data.MySqlClient.MySqlProviderServices,
MySql.Data.Entity, Version=6.7.4.0, Culture=neutral,
PublicKeyToken=c5687fc88969c44d' did not return an object that
inherits from 'System.Data.Entity.Core.Common.DbProviderServices'.
Entity Framework providers must inherit from this class and the
'Instance' member must return the singleton instance of the provider.
This may be because the provider does not support Entity Framework 6
or later
That because you are referencing EF 6, and MySQL Connector still does not support EF6. You can either downgrade to EF 5 or get the MySQL Connector Alpha.
Do this (KEEP A COPY OF WHAT YOU JUST PASTED):
Erase all references to EF6
Get EF 5 from Nuget (open a NuGet console and type Install-Package EntityFramework -Version 5.0.0 )
Regenerate your Entities
Make sure you get the <DbProviderFactories> and <providers> sections just like you have.
After you do what David suggested look in all of the App.config files and make sure that all of the depdentAssembly settings look something like this.
<dependentAssembly>
<assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
</dependentAssembly>
The important part is the bindingRedirect.
I came across the MySql.Data.Entity.EF6 NuGet package which should fix your issue. I found I had to completely remove all references to MySql and EF before I could get this to work properly (including all web.config references). The package has a dependency on EF6, so will install it as part of the package install process.
You can also use finished implementation of MySQL ASP.NET Identity 2.1 provider which uses ADO.NET to communicate with MySQL.
This is available as NuGet package and you can read more on this blog post:
ASP.NET Identity 2.1 implementation for MySQL