Question

当我们尝试使用Azure Mysql DB运行MVC4项目时，我们收到以下错误。

在Web.Config文件中，我们有以下内容，

<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" />
</DbProviderFactories>

错误：

无法找到或加载已注册的.Net Framework数据提供程序。

描述：执行期间发生了未处理的异常   当前的网络请求。请查看堆栈跟踪了解更多信息   有关错误的信息以及它在代码中的起源。

异常详细信息：System.Configuration.ConfigurationErrorsException：   无法找到或加载已注册的.Net Framework数据提供程序。

来源错误：

Line 96:             if (objectQuery != null && !string.IsNullOrEmpty(path))
Line 97:             {
Line 98:                 return objectQuery.Include(path);
Line 99:             }
Line 100:

Source File: C:\Phase2\FreeLance\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Extensions.cs    Line: 98 

Stack Trace: 


[ConfigurationErrorsException: Failed to find or load the registered .Net Framework Data Provider.]
   System.Data.Common.DbProviderFactories.GetFactory(DataRow providerRow) +2238858
   System.Data.EntityClient.EntityConnection.GetFactory(String providerString) +143
   System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString) +641
   System.Data.Entity.Internal.LazyInternalConnection.TryInitializeFromAppConfig(String name, AppConfig config) +144
   System.Data.Entity.Internal.LazyInternalConnection.Initialize() +95
   System.Data.Entity.Internal.LazyInternalConnection.CreateObjectContextFromConnectionModel() +16
   System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +269
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +26
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +71
   System.Data.Entity.Internal.Linq.InternalSet`1.Include(String path) +25
   System.Data.Entity.Infrastructure.DbQuery`1.Include(String path) +111
   FreeLance.Data.Framework.EntityFramework.Extensions.Include(IQueryable`1 source, String path) in C:\Phase2\FreeLance\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Extensions.cs:98
   FreeLance.Data.Framework.EntityFramework.Extensions.Include(IQueryable`1 source, Expression`1 expression) in C:\Phase2\FreeLance\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Extensions.cs:64
   FreeLance.Data.Framework.EntityFramework.Extensions.Include(IQueryable`1 source, Expression`1[] expressions) in C:\Phase2\FreeLance\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Extensions.cs:79
   FreeLance.Data.Framework.EntityFramework.Repository`1.GetAll(Expression`1[] include) in C:\Phase2\FreeLance\FreeLance\Framework\Data\FreeLance.Data.Framework\EntityFramework\Repository.cs:89
   FreeLance.Business.PageBC.GetPages() in C:\Phase2\FreeLance\FreeLance\Business\FreeLance.Business\Admin\PageBC.cs:49
   FreeLance.Services.PageService.GetPages() in C:\Phase2\FreeLance\FreeLance\Services\FreeLance.Services\PageService.cs:54
   FreeLance.Web.Helpers.DataHelper.GetAppPages() in C:\Phase2\FreeLance\FreeLance\User Interface\FreeLance.Web\Helpers\DataHelper.cs:250
   FreeLance.Web.ResourceConfig.GetAppPages() in C:\Phase2\FreeLance\FreeLance\User Interface\FreeLance.Web\App_Start\ResourceConfig.cs:64
   FreeLance.Web.AppConfig.Run() in C:\Phase2\FreeLance\FreeLance\User Interface\FreeLance.Web\App_Start\AppConfig.cs:55
   FreeLance.Web.MvcApplication.Application_Start() in C:\Phase2\FreeLance\FreeLance\User Interface\FreeLance.Web\Global.asax.cs:40

[HttpException (0x80004005): Failed to find or load the registered .Net Framework Data Provider.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +4054645
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +191
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +352
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +407
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +375

[HttpException (0x80004005): Failed to find or load the registered .Net Framework Data Provider.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +11646640
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +141
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +4869909

Answer 1

确保添加了 MySql.Data.Entity.dll ＆amp; MVC项目bin中的 MySql.Data.dll 文件

Answer 2

如果使用Mono，请确保在machine.config中也有MySQL Data Provider节点。我使用4.5，所以为我它 /opt/mono/4.5/machine.config （示例位置）：

<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=6.8.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" /> 
  </DbProviderFactories>
</system.data>

您可以通过在Linux中运行simple命令找到machine.config位置：

cd / && find -name 'machine.config'

在Ubuntu上sudo命令之前可能需要find：

cd / && sudo find -name 'machine.config'

无法使用MySql + MVC4查找或加载已注册的.Net Framework数据提供程序

2 个答案: