C# 使用MySql连接字符串的实体框架错误
我正在使用entity framework在cmd中开发一个应用程序进行研究,我正在使用MySql数据库,该数据库已经创建并连接到visual studio,但我无法打开应用程序,该应用程序目前很简单,下面是应用程序代码和错误: RdiContext.csC# 使用MySql连接字符串的实体框架错误,c#,mysql,entity-framework,C#,Mysql,Entity Framework,我正在使用entity framework在cmd中开发一个应用程序进行研究,我正在使用MySql数据库,该数据库已经创建并连接到visual studio,但我无法打开应用程序,该应用程序目前很简单,下面是应用程序代码和错误: RdiContext.cs using rdi_musica.core; using System.Data.Entity; namespace rdi_musica.infra { public class RdiContext : DbContext
using rdi_musica.core;
using System.Data.Entity;
namespace rdi_musica.infra
{
public class RdiContext : DbContext
{
public DbSet<Usuario> Usuarios { get; set; }
public DbSet<Genero> Generos { get; set; }
public DbSet<Banda> Bandas { get; set; }
public DbSet<Musica> Musicas { get; set; }
}
}
using rdi_musica.core;
using System.Linq;
namespace rdi_musica.infra
{
public class BandaRepository
{
RdiContext context = new RdiContext();
public Banda getBandaById(int Id)
{
var b = context.Bandas.Where(x => x.Id == Id).Select(x => x).FirstOrDefault();
return b;
}
}
}
App.config
<?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="Default" providerName="MySql.Data.MySqlClient" connectionString="server=localhost;port=3306;database=redeinova_musica;uid=root;password=root"/>
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="MySql.Data.Entity.MySqlConnectionFactory, MySql.Data.Entity.EF6" />
<!--defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" /-->
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6"/>
<!--provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /-->
<!--provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider-->
</providers>
</entityFramework>
<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=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
</configuration>
项目结构:
Ps:是的,我安装了MySql驱动程序并添加了引用
乍一看,您必须在
DbContext
类上设置DbConfigurationTypeAttribute
,才能使用MySQL:
namespace rdi_musica.infra
{
[DbConfigurationType(typeof(MySql.Data.Entity.MySqlEFConfiguration))]
public class RdiContext : DbContext
{
public DbSet<Usuario> Usuarios { get; set; }
public DbSet<Genero> Generos { get; set; }
public DbSet<Banda> Bandas { get; set; }
public DbSet<Musica> Musicas { get; set; }
}
}
然后移除dbProviderFactorys
系统内部的部分。数据元素:
<!-- taken from /a/21954322 by Donald Jansen -->
<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=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
参考:
类似问题:
<entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
...
</entityFramework>
<!-- taken from /a/21954322 by Donald Jansen -->
<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=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
<!-- taken from /a/21954322 by Donald Jansen -->
<entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
...
<providers>
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.9.9.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
</providers>
</entityFramework>