Why Can't I Select MySQL as a Connection Option for Entity Framework 6?

Troubleshooting MySQL Connectivity Issues for Entity Framework 6

Introduction

When attempting to integrate MySQL with Entity Framework 6, users may encounter an inability to select MySQL as a connection option. Despite specific steps taken, such as installing the necessary plugins and connectors, this issue may persist. This article investigates the root causes of this connection problem and explores potential solutions.

Understanding the Issue

The inability to select MySQL as a connection option in the ADO.NET Entity model creation process suggests a compatibility issue between the installed MySQL components and Entity Framework 6. As the OP has stated, the latest MySQL connector and plugin versions should theoretically resolve such issues. However, in this case, further troubleshooting is required.

The Bug

Through research, it was discovered that this issue was a known bug within MySQL. A workaround was provided, which involves copying the "MySql.Data.Entity.EF6.dll" file to a specific path. Unfortunately, this solution was not successful for the OP.

Alternative Solution

As a temporary measure, downgrading to Entity Framework 5 was suggested. However, this article explores an alternative solution that has been confirmed to resolve this issue:

1. Ensure the following DLLs are present:

   • MySql.Data.dll
   • MySql.Data.Entity.EF6.dll
   • MySql.Web.dll

2. Modify the "EntityFramework" section in the web config file as follows:

   <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" />
     </providers>
   </entityFramework>

Additional Considerations

It is crucial to ensure that MySQL for Visual Studio version 1.1.3 and MySQL connector .net version 6.8.3 are installed. Rebuilding the project after implementing these changes is essential for their successful implementation.

Conclusion

By following the alternative solution described in this article, users facing the "Can't use a MySQL connection for entity framework 6" issue should be able to establish a successful connection between MySQL and Entity Framework 6. It is recommended to verify the installed component versions and carefully follow the provided steps to resolve any lingering issues.

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