Visual Studio 2017和MySQL EntityFramework

Question

When adding a new ADO.NET Entity Data Model > EF Designer From database > New Connection > Change Connection I do not see MySQL as an option;

I have installed NuGet package MySQL.Data.Entity (as well as the required MySql.Data and Google.Protobuf).

Also when I add the package MySQL.Data.Entity, my existing MS SQL entities returns this error message;

System.TypeLoadException: 'Inheritance security rules violated by type: 'MySql.Data.MySqlClient.MySqlProviderServices'. Derived types must either match the security accessibility of the base type or be less accessible.'

Yet in the App.config it is still pointing to MS SQL;

<add name="MyDBEntities" connectionString="metadata=res://*/MyEntity.csdl|res://*/MyEntity.ssdl|res://*/MyEntity.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=MSSQLSERVER;initial catalog=MyDB;persist security info=True;user id=sa;password=MyPassword;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

If I remove the NuGet package MySQL.Data.Entity and change nothing it works correctly.

Answer 1

I solved just today the same error uninstalling all MySQL and re-installing (in the same order):

• 1.- mysql-for-visualstudio-1.2.7
• 2.- mysql-connector-net-6.8.8

And, in the VS project, installing with the Nuget package manager:

• 1.- Entity Framework v.6.0.0
• 2.- MySql.Data and MySql.Data.Entity v.6.8.8

I had been proving another versions and never the MySQL Data Source had seen until select this combination. I hope it's work for you. Regards.

NOTE: I have Visual Studio 2017.