I previously wrote a post about configuring MySQL for use with a Microsoft MVC application. I noticed after publishing that my application could not connect to the database and returned the following exception:
System.ArgumentException: 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. —> System.ArgumentException: Unable to find the requested .Net Framework Data Provider. It may not be installed.
In order to solve this I had to do two things:
- In the Solution Explore under ‘References’ set Copy Local to true for the MySql.data reference
- Add the database provider configuration to your Web.config as seen below, with your particular version
<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=188.8.131.52, Culture=neutral, PublicKeyToken=c5687fc88969c44d" /> </DbProviderFactories> </system.data>
The reason for #2 is that I am trying to run my code on a machine where the provider is not installed, so I have to specify the provider in my configuration file and then installation adds it to the machine.config registering the provider on the remote server.