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I have an old C++ desktop application which I am working though and updating. I have installed the Entity Framework 6.4.4 and MySQL.Data.EntityFramework 8.0.20. I'm getting the above error and after looking around it was based on the entity framework not being added in, so I went and did that, but I still am getting the same error. Also, the error points to the app.exe log file, but that logfile is from a couple of days ago, and doesn't look to have latest version of my config file since I had updated it, and it doesn't show the new code. I copied everything over from when I rebuild the solution, so I'm not sure why the old log file is still there. The start line which the error points to is the start of this.
<entityFramework>
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.EntityFramework, Version=8.0.20.0, Culture=neutral, PublicKeyToken=<tokenID>"
</provider>
</providers>
</entityFramework>
The only other line the error message points to is below and the value for the instance ID is 999, and I haven't changed it.
String ^iid = System::Configuration::ConfigurationManager::AppSettings["instanceId"];
@Brown, Matt , Welcome to Microsoft Q&A, based on your description, I need to confirm some questions with you. First, is your app a C++ app or a C++/Cli app? I noted that your last code likes C++/cli code. Second, Will it give an error just by adding these two packages? Are there any other steps? Third, if you create a new app then add the two packages, will the error still occur?
It is C++ CLI. I got an error in regards to not having MySQL until I added that. That is when the EntityFramework error happened so I add it only to still get it. I don't know of any other steps. I went looking for documentation for how this app is set up, but couldn't find any. I haven't had the time to try and create a new app yet. I have minimal C++ knowledge, and I have never worked with C++ CLI outside of this, and that's honestly been minimal work.
I forgot to add. The last time this was really worked on was from someone using VS 2015. I am using VS 2022, and was asked to upgrade the code when I first imported the code. I also tried to add in MySQL.Data and got an error with 'Could not install package 'MySql.Data 8.0.20.0'. You are trying to install this package into a project that targets 'native,Version=v0.0', but the package does not contain any assembly references or content files that are compatible with that framework.'
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Could not install package
Nuget do not work well with native C++. Try downloading MySql Connector/NET 8.0.20 from mysql website and add the DLL reference. In addition, did you add the reference of ConfigurationManager from System.Configuration dll?
Update. I found needed documentation and it resolved the issue in question.