Error using two DbContexts from same AppService Method (dotnetcore)

Hello there. Im having the same problem from #1706 but none of the solutions from that issue solved my problem. I have posted same question there, but I’ve decided to open a new issue since that one is already closed.

• Your Abp package version: 2.1.3
• Your base framework: .Net Framework or .Net Core: .Net Core
• Exception message and stack trace if available:

System.InvalidOperationException: The specified transaction is not associated with the current connection. Only transactions associated with the current connection may be used.
   at Microsoft.EntityFrameworkCore.Storage.RelationalTransaction..ctor(IRelationalConnection connection, DbTransaction transaction, ILogger logger, Boolean transactionOwned)
   at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.UseTransaction(DbTransaction transaction)
   at Abp.EntityFrameworkCore.Uow.DbContextEfCoreTransactionStrategy.CreateDbContext[TDbContext](String connectionString, IDbContextResolver dbContextResolver)
   at Abp.EntityFrameworkCore.Uow.EfCoreUnitOfWork.GetOrCreateDbContext[TDbContext](Nullable`1 multiTenancySide)
   at Abp.EntityFrameworkCore.Repositories.EfCoreRepositoryBase`3.get_Table()
   at Abp.EntityFrameworkCore.Repositories.EfCoreRepositoryBase`3.GetAllIncluding(Expression`1[] propertySelectors)
   at Castle.Proxies.Invocations.IRepository`2_GetAll_30.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.PerformSyncUow(IInvocation invocation, UnitOfWorkOptions options)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.IBusinessIntelligenceRepository`2Proxy.GetAll()
   at Erp.BusinessIntelligence.Dashboards.DashboardAppService.<GetDashboards>d__6.MoveNext() in C:\Users\Bruno\Work\NgIT\Korp\Erp\aspnet-core\src\Modules\BusinessIntelligence\Erp.BusinessIntelligence.Application\Dashboards\DashboardAppService.cs:line 55
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Mvc.Internal.ObjectMethodExecutor.<CastToObject>d__38`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeActionMethodAsync>d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextActionFilterAsync>d__25.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Rethrow(ActionExecutedContext context)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.<InvokeNextExceptionFilterAsync>d__24.MoveNext()

@hikalkan would you please shed some light, im struggling with this.

None of the solutions above have worked for me.

Here is my structure:

Default AspNetZero project created so I have Erp.EntityFrameworkCore project Project set for custom module: Core/App/EFCore/WebCore.

For the record I have created the same structure for EFCore module. With a single DbContext everything works fine. When I User one repository from another dbcontext (main abp core module like User) it throws the exception:

The specified transaction is not associated with the current connection. Only transactions associated with the current connection may be used.

ErpEntityFrameworkCoreModule – from Abp

/// <summary>
    /// Entity framework Core module of the application.
    /// </summary>
    [DependsOn(
        typeof(AbpZeroCoreEntityFrameworkCoreModule), 
        typeof(ErpCoreModule), 
        typeof(AbpZeroCoreIdentityServerEntityFrameworkCoreModule)
        )]
    public class ErpEntityFrameworkCoreModule : AbpModule
    {
        /* Used it tests to skip dbcontext registration, in order to use in-memory database of EF Core */
        public bool SkipDbContextRegistration { get; set; }

        public bool SkipDbSeed { get; set; }

        public override void PreInitialize()
        {
            Configuration.ReplaceService<IEfCoreTransactionStrategy, DbContextEfCoreTransactionStrategy>(DependencyLifeStyle.Transient);

            if (!SkipDbContextRegistration)
            {
                Configuration.Modules.AbpEfCore().AddDbContext<ErpDbContext>(configuration =>
                {
                    ErpDbContextConfigurer.Configure(configuration.DbContextOptions, configuration.ConnectionString);
                });
            }
        }

        public override void Initialize()
        {
            IocManager.RegisterAssemblyByConvention(typeof(ErpEntityFrameworkCoreModule).GetAssembly());
        }

        public override void PostInitialize()
        {
            if (!SkipDbSeed)
            {
                SeedHelper.SeedHostDb(IocManager);
            }
        }
    }

CustomServiceEntityFrameworkCoreModule

[DependsOn(
        typeof(CustomServiceCoreModule),
        typeof(ErpEntityFrameworkCoreModule)
    )]
    public class CustomServiceEntityFrameworkCoreModule : AbpModule
    {
        /* Used it tests to skip dbcontext registration, in order to use in-memory database of EF Core */
        public bool SkipDbContextRegistration { get; set; }

        public bool SkipDbSeed { get; set; }

        public override void PreInitialize()
        {
            Configuration.ReplaceService<IEfCoreTransactionStrategy, DbContextEfCoreTransactionStrategy>(DependencyLifeStyle.Transient);

            if (!SkipDbContextRegistration)
            {
                Configuration.Modules.AbpEfCore().AddDbContext<CustomServiceDbContext>(configuration =>
                {
                    CustomServiceDbContextConfigurer.Configure(configuration.DbContextOptions, configuration.ConnectionString);
                });
            }
        }

        public override void Initialize()
        {
            IocManager.RegisterAssemblyByConvention(typeof(CustomServiceEntityFrameworkCoreModule).GetAssembly());
        }

        public override void PostInitialize()
        {
            if (!SkipDbSeed)
            {
                CustomServiceSeedHelper.SeedDataConnectionsDb(IocManager);
            }
        }
    }

[iyhammad]

Hello, I’m facing the exact same issue after upgrading my solution to EFCore. I’ve Core System and multiple modules and every module has its own Db Context. the Solution is also multi-tenancy. I’ve one HostDbContext for Host and has fixed connection string coming from the configuration. I’ve TenantDbContext per module (Total 4 modules for now). In EF6 the same structure was working fine. now in EFCore I got the mentioned exception. Could your please help us in this issue. Thanks,

[hikalkan]

Please re-open if you have the problem again.