Asp.net mvc StructureMap/ASP.MVC/visualstudio/LinqToSql的奇怪行为

我最近一直在使用新的MVC框架和StructureMap，总体来说效果不错，但是，我一直遇到一个非常奇怪的错误，我无法理解或解决

这是我的架构：

• DBContext—linqToSql数据上下文
• IRepository-合同定义数据方法
• IService—定义服务方法的契约
• 控制器-本例中为两个

因此，我有：

public class Repo : IRepository
{
    public Repo(DBContext db)
    {
       .....
    }
}

public class Service : IService
{
    public Service(IRepository repo)
    {
       .....
    }
}

public class ControllerOne : Controller
{
    public ControllerOne(IService service)
    {
       .....
    }
}

public class ControllerTwo : Controller
{
    public ControllerTwo(IService service)
    {
       .....
    }
}

StructureMap用于定义IRepository和iSeries设备的具体类型，DBContext由DSL注册表配置的lamba表达式-（）=>new DBContext（）构造

目前没有DBContext的缓存

关于这个问题：

我的索引页面加载并同时向ControllerOne和ControllerTwo发出两个Ajax请求，这两个请求是通过MvcContrib的StructureMap控制器工厂构建的

StructureMap正在注入IService的具体类型，而IService又是使用已配置的IRepository实例和新的DBContext对象创建的

ControllerOne正在从IService实例请求一个模型，然后将该模型作为JsonActionResult返回，该结果由Newtonsoft.Json呈现

ControllerTwo正在请求IService实例的不同模型，当MVC框架执行ActionResult时，IService实例也被序列化为Json对象

我在VS2008中通过卡西尼号运行该网站

我时不时看到的问题是从LinqToSql内部生成的错误

• 无法读取数据，已经有一个读卡器打开或关闭
• 无法将数据加载到数据表中，因为数据已经存在（目前我手头没有确切的异常，但它们都是LinqToSql内部的）

如果错误发生在ControllerOne中，那么ControllerTwo也将失败并出现类似的错误，就像这两个请求使用共享对象运行一样

它不会一直出错，但这足以让我担心我的体系结构以及它在某些方面的配置错误

StructureMap是否有可能在后续请求中返回相同的ControllerOne和ControllerTwo实例，或者是否以任何方式缓存DBContext？即使我没有要求它

在VisualStudio/Cassini中工作时，有人见过类似的情况吗？通过IIS有帮助吗

我应该删除LinqToSql吗

关闭VisualStudio并重新开放通常可以解决一段时间的问题

如果有人能解释这个问题，我将不胜感激

编辑：包括NLog日志文件中的日志片段（线程id是分号之前的编号）：

03/20/2009 01:40:32 12:controller=Timesheet，date=2001-05-06，Action=WeekEnding/beta/Timesheet/2001-05-06？\u dc=1237513232397
2009年03月20日01:40:32 10:controller=时间表，日期=2001-05-06，动作=WeekEnding/beta/Timesheet/2001-05-06？\u dc=1237513232449
03/20/2009 01:40:32 10:已存在与此命令关联的打开的DataReader，必须先关闭它。System.Data.SqlClient.SqlInternalConnectionDS.ValidateConnectionForExecute（SqlCommand）处的System.InvalidOperationException[br]
位于System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute（字符串方法，SqlCommand）
位于System.Data.SqlClient.SqlCommand.ValidateCommand（字符串方法，布尔异步）
位于System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior、RunBehavior RunBehavior、Boolean returnStream、String方法、DbAsyncResult）
位于System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior、RunBehavior RunBehavior、Boolean returnStream、String方法）
位于System.Data.SqlClient.SqlCommand.ExecuteReader（CommandBehavior，String方法）
位于System.Data.SqlClient.SqlCommand.ExecuteDbDataReader（CommandBehavior）
在System.Data.Common.DbCommand.ExecuteReader（）中
在System.Data.Linq.SqlClient.SqlProvider.Execute（表达式查询、查询信息查询信息、IOObjectReaderFactory工厂、对象[]parentArgs、对象[]userArgs、ICompiledSubQuery[]子查询、对象lastResult）
位于System.Data.Linq.SqlClient.SqlProvider.ExecuteAll（表达式查询、QueryInfo[]QueryInfo、IOObjectReaderFactory工厂、Object[]userArguments、ICompiledSubQuery[]subQueries）
位于System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute（表达式查询）
位于System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S]（表达式）
在System.Linq.Queryable.Sum[TSource]（IQueryable`1源，表达式`1选择器）
在HCD.Intranet.Core.Data.Linq.LinqEmployeeRepository.calculateHolidaysMaining（员工、日期时间周末、Int32非项目）
在HCD.Intranet.Core.Services.Impl.EmployeeService.CalculateHolidaysRemaining（员工-员工，日期-时间-周末）
在HCD.Intranet.Core.Models.Timesheet.CalculateHolidaysRemaining（）中
位于HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteTimesheet（JsonWriter编写器，时间表时间表）
位于HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteJson（JsonWriter编写器，对象值）
位于Newtonsoft.Json.JsonSerializer.SerializeValue（JsonWriter编写器、对象值、JsonConverter memberConverter）
位于Newtonsoft.Json.JsonSerializer.WriteMemberInfo属性（JsonWriter编写器，对象值，JsonMemberMapping memberMapping）
位于Newtonsoft.Json.JsonSerializer.SerializeObject（JsonWriter编写器，对象值）
位于Newtonsoft.Json.JsonSerializer.SerializeValue（JsonWriter编写器、对象值、JsonConverter memberConverter）
在Newtonsoft.Json.JsonSerializer.Serialize（JsonWriter JsonWriter，对象值）
位于HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.executesult（ControllerContext上下文）
在System.Web.Mvc.ControllerActionInvoker.InvokeActionResult（C
03/20/2009 01:40:32 12: controller=Timesheet,date=2001-05-06,Action=WeekEnding /beta/Timesheet/2001-05-06?_dc=1237513232397 
03/20/2009 01:40:32 10: controller=Timesheet,date=2001-05-06,Action=WeekEnding /beta/Timesheet/2001-05-06?_dc=1237513232449 
03/20/2009 01:40:32 10: There is already an open DataReader associated with this Command which must be closed first. System.InvalidOperationException[br]   at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command)
   at System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command)
   at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at System.Data.Common.DbCommand.ExecuteReader()
   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
   at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
   at System.Linq.Queryable.Sum[TSource](IQueryable`1 source, Expression`1 selector)
   at HCD.Intranet.Core.Data.Linq.LinqEmployeeRepository.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding, Int32 nonProjectId)
   at HCD.Intranet.Core.Services.Impl.EmployeeService.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding)
   at HCD.Intranet.Core.Models.Timesheet.CalculateHolidaysRemaining()
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteTimesheet(JsonWriter writer, Timesheet timesheet)
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteJson(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.WriteMemberInfoProperty(JsonWriter writer, Object value, JsonMemberMapping memberMapping)
   at Newtonsoft.Json.JsonSerializer.SerializeObject(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
   at HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<InvokeActionResultWithFilters>b__e()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
03/20/2009 01:40:32 12: Invalid attempt to call Read when reader is closed. System.InvalidOperationException[br]   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
   at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
   at System.Linq.Queryable.Sum[TSource](IQueryable`1 source, Expression`1 selector)
   at HCD.Intranet.Core.Data.Linq.LinqEmployeeRepository.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding, Int32 nonProjectId)
   at HCD.Intranet.Core.Services.Impl.EmployeeService.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding)
   at HCD.Intranet.Core.Models.Timesheet.CalculateHolidaysRemaining()
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteTimesheet(JsonWriter writer, Timesheet timesheet)
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteJson(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.WriteMemberInfoProperty(JsonWriter writer, Object value, JsonMemberMapping memberMapping)
   at Newtonsoft.Json.JsonSerializer.SerializeObject(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
   at HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<InvokeActionResultWithFilters>b__e()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
03/20/2009 01:41:58 12: controller=Timesheet,month=6,year=2001,Action=Calendar /beta/Timesheet/Calendar/6/2001?_dc=1237513318470 
03/20/2009 01:41:59 10: controller=Timesheet,date=2001-06-03,Action=WeekEnding /beta/Timesheet/2001-06-03?_dc=1237513318509 
03/20/2009 01:41:59 12: The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type. System.InvalidOperationException[br]   at Read_TimesheetEntry(ObjectMaterializer`1 )
   at System.Data.Linq.SqlClient.ObjectReaderCompiler.ObjectReader`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at HCD.Intranet.Core.Data.Linq.LinqTimesheetRepository.GetEntries(Int32 timesheetHeaderId)
   at HCD.Intranet.Core.Services.Impl.TimesheetService.GetEntries(Int32 timesheetHeaderId)
   at HCD.Intranet.Core.Models.Timesheet.get_InnerEntries()
   at HCD.Intranet.Core.Models.TimeMap..ctor(Timesheet timesheet)
   at HCD.Intranet.Core.Models.Json.TimesheetCalendarJsonConverter.WriteTimesheet(JsonWriter writer, Timesheet[] timesheets)
   at HCD.Intranet.Core.Models.Json.TimesheetCalendarJsonConverter.WriteJson(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
   at HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<InvokeActionResultWithFilters>b__e()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
03/20/2009 01:41:59 12: controller=Timesheet,date=2001-06-03,Action=WeekEnding /beta/Timesheet/2001-06-03?_dc=1237513318545 
03/20/2009 01:41:59 12: There is already an open DataReader associated with this Command which must be closed first. System.InvalidOperationException[br]   at System.Data.SqlClient.SqlInternalConnectionTds.ValidateConnectionForExecute(SqlCommand command)
   at System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command)
   at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at System.Data.Common.DbCommand.ExecuteReader()
   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
   at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
   at System.Linq.Queryable.Sum[TSource](IQueryable`1 source, Expression`1 selector)
   at HCD.Intranet.Core.Data.Linq.LinqEmployeeRepository.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding, Int32 nonProjectId)
   at HCD.Intranet.Core.Services.Impl.EmployeeService.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding)
   at HCD.Intranet.Core.Models.Timesheet.CalculateHolidaysRemaining()
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteTimesheet(JsonWriter writer, Timesheet timesheet)
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteJson(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.WriteMemberInfoProperty(JsonWriter writer, Object value, JsonMemberMapping memberMapping)
   at Newtonsoft.Json.JsonSerializer.SerializeObject(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
   at HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<InvokeActionResultWithFilters>b__e()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)
03/20/2009 01:41:59 10: Invalid attempt to call Read when reader is closed. System.InvalidOperationException[br]   at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
   at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
   at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
   at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression)
   at System.Linq.Queryable.Sum[TSource](IQueryable`1 source, Expression`1 selector)
   at HCD.Intranet.Core.Data.Linq.LinqEmployeeRepository.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding, Int32 nonProjectId)
   at HCD.Intranet.Core.Services.Impl.EmployeeService.CalculateHolidaysRemaining(Employee employee, DateTime weekEnding)
   at HCD.Intranet.Core.Models.Timesheet.CalculateHolidaysRemaining()
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteTimesheet(JsonWriter writer, Timesheet timesheet)
   at HCD.Intranet.Core.Models.Json.TimesheetJsonConverter.WriteJson(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.WriteMemberInfoProperty(JsonWriter writer, Object value, JsonMemberMapping memberMapping)
   at Newtonsoft.Json.JsonSerializer.SerializeObject(JsonWriter writer, Object value)
   at Newtonsoft.Json.JsonSerializer.SerializeValue(JsonWriter writer, Object value, JsonConverter memberConverter)
   at Newtonsoft.Json.JsonSerializer.Serialize(JsonWriter jsonWriter, Object value)
   at HCD.Intranet.Core.Web.Mvc.NewtonsoftJsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<InvokeActionResultWithFilters>b__e()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass11.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)

MultipleActiveResultSets=True

    ForRequestedType<SomeDataContext>().TheDefault.Is.ConstructedBy(
        () => new SomeDataContext(someConnString);