提供者实体框架MySQL中的错误

Question

I try to connect my entity framework in MySQL database but when i connect this error happen

No Entity Framework provider found for the ADO.NET provider with invariant name 'MySql.Data.MySqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.

This is my appConfig for my class library whit entity

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
 <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<connectionStrings>
<add name="portallentesContext" connectionString="server=******;User Id=******;password=*********;Persist Security Info=True;database=portallentes"
  providerName="MySql.Data.MySqlClient" />
</connectionStrings>
<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=6.6.4.0" />
</DbProviderFactories>
</system.data>

<entityFramework>
<providers>
  <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.6.4.0" >
  </provider>
</providers>
</entityFramework>
</configuration>

Answer 1

将带有MySql.Data.Entity.EF6.dll的MySql.Data.Entity.EF5.dll复制到bin目录。

Answer 2

Take a look at my answer here: https://stackoverflow.com/a/42588773/3652378 .

Make sure you have MySql.Data.dll referenced in the calling assembly (not only in the class library project, but also in the web application / wcf application which calls the class library).