实体框架5.0代码优先使用.Net 4.5上的MySQL Connector 6.6.5.0

Question

对于我的生活,我无法让我的C#WinApp使用MySql连接器6.6.5.0(MySql.Data参考)和MySql Entity 6.5.4.0(MySql.Data.Entity参考)与MySql数据库一起使用Entity Framework 5.0 .在Visual Studio 2012上使用.Net Framework 4.5.在撰写本文时,上述版本都是最新的稳定版本.

这是我在app.config上的内容

<?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=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <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" />
    </DbProviderFactories>
  </system.data>
  <connectionStrings>
    <add name="MyConnectionName" 
         connectionString="Server=mysql13.myserver.com.br;Database=mydb;User Id=username;Pwd=pa$$w0rd;" 
         providerName="MySql.Data.MySqlClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data">
    </defaultConnectionFactory>
  </entityFramework>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.6.5.0" newVersion="6.6.5.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

在代码中

用户类

public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
    public virtual List<Permission> Permissions { get; set; }

    public User()
    {
        Permissions = new List<Permission>();
    }
}

public class Permission
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Description { get; set; }
}

public class UserContext : DbContext
{
    public DbSet<User> Users { get; set; }
    public DbSet<Permission> Permissions { get; set; }
}

创建新记录

        using (var db = new UserContext())
        {
            Permission permission1 = new Permission() { Name = "Permission 1", Description = "The desc 1" };
            Permission permission2 = new Permission() { Name = "2nd Perm", Description = "Desc2" };
            User user = new User() { Name = "Joao" };
            user.Permissions.Add(permission1);
            user.Permissions.Add(permission2);

            db.Users.Add(user);
            db.SaveChanges();
        }

我在线上得到例外 db.Users.Add(user);

System.InvalidOperationException was unhandled
  HResult=-2146233079
  Message=Failed to set Database.DefaultConnectionFactory to an instance of the 'MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data' type as specified in the application configuration. See inner exception for details.
  Source=EntityFramework
  StackTrace:
       at System.Data.Entity.Internal.AppConfig.<.ctor>b__1()
       at System.Lazy`1.CreateValue()
    --- End of stack trace from previous location where exception was thrown ---
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at System.Lazy`1.get_Value()
       at System.Data.Entity.Internal.AppConfig.get_DefaultConnectionFactory()
       [removing the rest of the stack]
  InnerException: System.InvalidCastException
       HResult=-2147467262
       Message=Unable to cast object of type 'MySql.Data.MySqlClient.MySqlClientFactory' to type 'System.Data.Entity.Infrastructure.IDbConnectionFactory'.
       Source=EntityFramework
       StackTrace:
            at System.Data.Entity.Internal.AppConfig.<.ctor>b__1()
       InnerException: 

我已经试过几件事情,包括增加Culture=neutral, PublicKeyToken=c5687fc88969c44d的DbProviderFactories部分也没有用..

我使用NuGet Package Manager添加了Entity Framework,MySql Data Connector和MySql.Data.Entity.

我见过很多其他类似问题的帖子,但找不到明确的解决方案,尤其是版本控制组合EF 5 + MySql Connector 6.6.5.0.

有没有人做过这项工作？你可以发布app.config和代码来使它工作吗？

Answer 1

MySQL Connector 6.6.5仅支持此处提到的Entity Framework 4.3 .到目前为止,我亲自使用过它.但是,如果您需要实体框架5具体来说,你需要使用MySQL连接器6.6.7测试版现在支持它提到这里.我没有尝试过v 6.6.7.

更新1:您可以在此处找到使用EF 4.3代码优先使用MySQL Connector 6.6的博文.

更新2:使用EF 4.3和MySQL连接6.6.5样品.NET 4.5的控制台应用程序在这里.