文章/答案/技术大牛

发布

社区首页 >问答首页 >实体框架5.0代码优先-在.Net 4.5上使用MySQL连接器6.6.5.0

问实体框架5.0代码优先-在.Net 4.5上使用MySQL连接器6.6.5.0
EN

Stack Overflow用户

提问于 2013-05-07 11:38:43

回答 4查看 18.8K关注 0票数 7

就我而言，我无法让我的C# WinApp使用MySql数据库，使用MySql连接器6.6.5.0 (MySql.Data参考资料)和MySql Entity 6.5.4.0 (MySql.Data.Entity参考资料)来处理Entity Framework5.0。在Visual Studio2012上使用.Net框架4.5。在撰写本文时，上面的版本都是最新的稳定版本。

这是我在app.config上的资料

<?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db.Users.Add(user);行得到了一个异常

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:

我已经尝试了几种方法，包括在DbProviderFactories部分添加Culture=neutral, PublicKeyToken=c5687fc88969c44d，但都没有用。

我使用NuGet包管理器添加了实体框架、MySql数据连接器和MySql.Data.Entity。

我见过许多其他有类似问题的帖子，但找不到明确的解决方案，特别是版本组合EF 5+ MySql连接器6.6.5.0。

有没有人做到这一点？你能同时发布app.config和代码以使其工作吗？

mysql-connector

.net

entity-framework

entity-framework-5

.net-4.5

回答 4

Stack Overflow用户

发布于 2013-05-07 14:59:13

正如前面提到的here，MySQL连接器6.6.5只支持实体框架4.3。到目前为止，我个人使用过它，效果很好。但是，如果您特别需要Entity Framework5，您将需要使用现在支持here的MySQL连接器6.6.7Beta。不过，我还没有尝试过v6.6.7。

更新1:您可以找到在MySQL连接器6.6 here中使用EF4.3代码优先的博客文章。

更新2:使用EF 4.3和.NET连接器6.6.5 here的示例MySql 4.5控制台应用程序。

票数 5

Stack Overflow用户

发布于 2013-05-08 13:11:40

听起来好像有一些奇怪的程序集解析问题。尝试删除配置文件中的assemblyBinding元素，然后运行NuGet的Add-BindingRedirect命令。

票数 0

Stack Overflow用户

发布于 2013-05-08 15:03:29

我的大部分产品web.config。我拿出了所有公司特有的东西..。此外，此配置是为使用IIS压缩的MVC4/EF5/OData 5.2设置的。不需要非常复杂的stuff...most。但我想你想要我的原始配置作为参考。

<?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=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
      <section name="EdgeService.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
    </sectionGroup>
  </configSections>

  <appSettings>
    <add key="log4net.Config.Watch" value="True" />
    <add key="log4net.Config" value="EdgeService.log4net.config" />
    <add key="PullVersionPeriod" value="30000" />
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <httpRuntime maxRequestLength="12288" maxUrlLength="10999" maxQueryStringLength="2097151"/>
    <compilation debug="true" targetFramework="4.5">
      <assemblies>
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        <add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
        <add assembly="System.Web.Helpers" />
      </assemblies>
    </compilation>
    <authentication mode="Windows" />
    <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />
  </system.web>
  <system.data>
    <DbProviderFactories>
      <clear />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description="ADO.Net driver for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.5.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    </DbProviderFactories>
  </system.data>
  <system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="false" />
  </system.serviceModel>
  <system.webServer>
    <handlers>
      <remove name="svc-Integrated-4.0" />
      <remove name="WebDAV" />
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" />
      <remove name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" />
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_32bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
      <add name="ExtensionlessUrlHandler-ISAPI-4.0_64bit" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="WebDAVModule" />
      <add name="PerRequestLifestyle" type="Castle.MicroKernel.Lifestyle.PerWebRequestLifestyleModule, Castle.Windsor" />
    </modules>
    <security>
      <requestFiltering>
        <requestLimits maxQueryString="100000" />
      </requestFiltering>
      <authentication>
        <!--C:\Windows\System32\inetsrv\config\applicationHost.config-->
        <anonymousAuthentication enabled="false" />
        <windowsAuthentication enabled="true">
          <providers>
            <clear />
            <add value="Negotiate" />
          </providers>
        </windowsAuthentication>
      </authentication>
    </security>
    <httpCompression>
      <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" staticCompressionLevel="9" dynamicCompressionLevel="4" />
      <dynamicTypes>
        <add enabled="true" mimeType="Application/*" />
        <add enabled="true" mimeType="application/atom+xml;type=feed;charset=utf-8" />
      </dynamicTypes>
    </httpCompression>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data" publicKeyToken="C5687FC88969C44D" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.6.4.0" newVersion="6.6.4.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="MySql.Data.Entity" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.6.4.0" newVersion="6.6.4.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="MySql.Web" publicKeyToken="c5687fc88969c44d" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-6.6.4.0" newVersion="6.6.4.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.4.0.0" newVersion="5.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Data.Edm" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.0.0" newVersion="5.2.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Data.OData" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.0.0" newVersion="5.2.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Spatial" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-5.2.0.0" newVersion="5.2.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/16410817

复制

相似问题

问实体框架5.0代码优先-在.Net 4.5上使用MySQL连接器6.6.5.0
EN

回答 4

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问实体框架5.0代码优先-在.Net 4.5上使用MySQL连接器6.6.5.0EN

回答 4

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问实体框架5.0代码优先-在.Net 4.5上使用MySQL连接器6.6.5.0
EN