如何首先使用MySql和Entity Framework 4.1代码

Question

我试图在MVCMusicStore
http://mvcmusicstore.codeplex.com/而不是MSSQL中使用MySQL数据库.
我想用MySQL学习Code第一次开发.
我已将这些代码添加到web.config中

<connectionStrings>
  <add name="MusicStoreEntities"
       connectionString="Server=localhost; Database=MvcMusicStore; Uid=root; Pwd=;"
       providerName="MySql.Data.MySqlClient"/>
</connectionStrings>
<system.data>
  <DbProviderFactories>
    <add name="MySQL Data Provider"
         invariant="MySql.Data.MySqlClient"  
         description=".Net Framework Data Provider for MySQL"  
         type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.3.6.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
  </DbProviderFactories>   
</system.data>

已创建MySQL数据库,但未创建表.我刚刚添加了Mysql.Data.MySQLClient.dll对我的项目的引用.我有这种例外:

为system.data创建配置节处理程序时发生错误:
列'InvariantName'被限制为唯一.
值'MySql.Data.MySqlClient'已存在.
(C:\ Users\Dauren\Downloads\MvcMusicStore-v3.0\MvcMusicStore-v3.0\MvcMusicStore-Completed\MvcMusicStore\web.config第47行)

Answer 1

试试这段代码:

 <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=6.3.6.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />  
  </DbProviderFactories>