C# Entity Framework .Net Framework Data Provider. It may not be installed

 Unable to find the requested .Net Framework Data Provider. It may not be installed??

在web.config中的 configuration  的节点下面添加如下内容

<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=6.5.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
        </DbProviderFactories>
    </system.data>

 

来源：oschina

链接：https://my.oschina.net/it110/blog/4299063