EF。 AutoFac。 不斷得到錯誤DBContext已被處置

Question

初始數據。 代碼優先，Autofac

之前是Linq2Sql和整個數據層都在主項目中。 我在EF CodeFirst上重寫了所有內容。 現在我不斷收到錯誤：DBContext已被處理掉

有一節課：

public class DataManager: IDataManager    
{
    private IModelDataContextWrapper _dataContext;

    public IAuditRepository Audits { get; set; }
    public ICDMRepository CDMs { get; set; }
    public ICommandRepository Commands { get; set; }
    public IMonitoringRepository Monitorings { get; set; }
    public IRoleRepository Roles { get; set; }
    public ISettingRepository Settings { get; set; }
    public IUserRepository Users { get; set; }

    public DataManager(IModelDataContextWrapper dataContext)    
    {    
        _dataContext = dataContext;    
    }

    public IModelDataContextWrapper DataContext    
    {    
        get    
        {    
            return _dataContext;    
        }    
    }

    public void Dispose()    
    {    
        if (_dataContext != null)    
        {    
            _dataContext.Dispose();    
            _dataContext = null;    
        }
        GC.SuppressFinalize(this);    
    }

    public void SaveChanges()    
    {    
        try    
        {    
            DataContext.SaveChanges();    
        }    
        catch (Exception ex)    
        {    
            string err = string.Format("exception: {0} stacktrace: {1}", ex.Message, ex.StackTrace);

            Logger.Instance.WriteLine(err);    
        }    
    }    
}

public class UserRepository : IUserRepository    
{    
    private readonly IModelDataContext _context;

    public UserRepository(IModelDataContext context)    
    {    
        _context = context;    
    }
}

Autofac注冊：

var builder = new ContainerBuilder();
builder.RegisterControllers(Assembly.GetExecutingAssembly());

builder.RegisterType<ModelDataContext>().As<IModelDataContext>().InstancePerLifetimeScope();
builder.RegisterType<ModelDataContextWrapper>().As<IModelDataContextWrapper>().InstancePerLifetimeScope();
builder.RegisterType<ArchiveModelDataContext>().As<IArchiveModelDataContext>().InstancePerLifetimeScope();

builder.RegisterType<DataManager>().As<IDataManager>().PropertiesAutowired().InstancePerLifetimeScope();

builder.RegisterType<AuditRepository>().As<IAuditRepository>().InstancePerLifetimeScope();
builder.RegisterType<CommandRepository>().As<ICommandRepository>().InstancePerLifetimeScope();
builder.RegisterType<CDMRepository>().As<ICDMRepository>().InstancePerLifetimeScope();
builder.RegisterType<MonitoringRepository>().As<IMonitoringRepository>().InstancePerLifetimeScope();
builder.RegisterType<RoleRepository>().As<IRoleRepository>().InstancePerLifetimeScope();
builder.RegisterType<SettingRepository>().As<ISettingRepository>().InstancePerLifetimeScope();
builder.RegisterType<UserRepository>().As<IUserRepository>().InstancePerLifetimeScope();
builder.RegisterType<ThemedViewEngine>();

builder.RegisterFilterProvider();

IContainer container = builder.Build();

DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
var lifetimeScope = DependencyResolver.Current.GetService<ILifetimeScope>();

lifetimeScope.InjectProperties(Membership.Provider);

lifetimeScope.InjectProperties(Roles.Provider);

怎么了？

Answer 1

我個人使用.InstancePerRequest（）; 在網絡環境中。 您需要在視圖中避免IQueryable，確保在控制器中有ToList（）或請求觸發器，而不是在視圖中

更新：

        builder.RegisterType<ModelDataContextWrapper>()
            .As<IModelDataContextWrapper >()
            .InstancePerRequest();