发布到 IIS 服务器后的 ASP.NET Identity with MySql 问题

Question

I made a ASP.NET Web Api. I have my connection string inside web.config and it looks like this:

<add name="AuthContext" connectionString="Data Source=*****; Initial Catalog=*****;Uid=*****;Pwd=****;SslMode=None;" providerName="MySql.Data.MySqlClient" />

This database is also on external server and can be reached from anywhere. On my local machine everythings works completely fine, but when i publish it to exteral IIS server i get that error:

"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.",

and also this:

"InnerException": {
        "Message": "An error has occurred.",
        "ExceptionMessage": "Unable to find the requested .Net Framework Data Provider.  It may not be installed.",
        "ExceptionType": "System.ArgumentException",
        "StackTrace": "   at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)\r\n   at System.Data.Entity.Infrastructure.DependencyResolution.DefaultProviderFactoryResolver.GetService(Type type, Object key, Func`3 handleFailedLookup)"
    }

I would like to know why during connecting to dabase with for example ADO.NET i have to use

SslMode=None

In other case i get that error:

it means handshake failed, unexpected package format Also i get another error in another controller and also only in IIS:

Answer 1

Alright, so in my web.config i added:

<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=8.0.13.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
   </DbProviderFactories>
</system.data>

and than everything worked fine