无法找到或加载已注册的.Net Framework数据提供程序

Question

我收到以下错误:"无法找到或加载已注册的.Net Framework数据提供程序." 它只发生在AppHarbor服务器上,而不是我的本地服务器

我使用.Net mvc4和mysql

我已经添加了MySql.Data,MySql.Data.Entity,MySql.Web来引用并设置Copy Local = true.我也将bin文件夹推送到AppHarbor

这是我的web.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
  </configSections>
  <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>
  <connectionStrings>
    <add name="fmcdatabaseEntities" connectionString="metadata=res://*/Models.FMCEntityDataModel.csdl|res://*/Models.FMCEntityDataModel.ssdl|res://*/Models.FMCEntityDataModel.msl;provider=MySql.Data.MySqlClient;provider connection string=&quot;server=****;uid=****;port=3306;database=****&quot;" providerName="System.Data.EntityClient"/>
  </connectionStrings>
  <appSettings>
    <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"/>
    <add key="enableSimpleMembership" value="false"/>
    <add key="autoFormsAuthentication" value="false"/>
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.5">
      <assemblies>
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      </assemblies>
    </compilation>
    <httpRuntime targetFramework="4.5" />
    <authentication mode="Forms">
      <forms loginUrl="~/Account/Login" timeout="2880"/>
    </authentication>
    <membership defaultProvider="CustomMembershipProvider">
      <providers>
        <clear/>
        <add name="CustomMembershipProvider" type="FindMyCrushServer.Controllers.ControllerHelpers.CustomMembershipProvider" connectionStringName="fmcdatabaseEntities" applicationName="FindMyCrushServer" enablePasswordRetrieval="false" enablePasswordReset="false" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" passwordFormat="Clear"/>
      </providers>
    </membership>
    <roleManager defaultProvider="CustomRoleProvider" enabled="true" cacheRolesInCookie="false">
      <providers>
        <clear/>
        <add name="CustomRoleProvider" type="FindMyCrushServer.Controllers.ControllerHelpers.CustomRoleProvider"/>
      </providers>
    </roleManager>
    <pages>
      <namespaces>
        <add namespace="System.Web.Helpers"/>
        <add namespace="System.Web.Mvc"/>
        <add namespace="System.Web.Mvc.Ajax"/>
        <add namespace="System.Web.Mvc.Html"/>
        <add namespace="System.Web.Optimization"/>
        <add namespace="System.Web.Routing"/>
        <add namespace="System.Web.WebPages"/>
      </namespaces>
    </pages>
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <handlers>
      <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>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>
  </entityFramework>
</configuration>

任何帮助真的很感激.预先感谢

Answer 1

您是否尝试过使用NuGet包？

• http://nuget.org/packages/MySql.Data
• http://nuget.org/packages/MySQL.Data.Entities

......他们应该确保正确的位去他们需要的地方.您可以使用NuGet包还原来避免将包内容推送到AppHarbor.

Answer 2

我刚刚看到，在我的例子中，这个异常的原因是 dll 和配置条目之间的版本不同。

因此，有时您实际拥有的 dll（通过 nuget 或其他方式安装）与 app.config 节点中的条目不同。如果 app.config 中没有此部分，也可以在下面找到

Windows\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config 和附近的文件夹。

更改 dll 版本条目中的版本解决了该问题。