我的项目中有一个登录页面，用户可以使用它登录，如您所见：
public class LoginController : Controller
{
private IUserRepository _iuserRepository;
public LoginController(IUserRepository userRepository)
{
_iuserRepository = userRepository;
}
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult Index(string email, string password, string returnUrl)
{
if (_iuserRepository.CheckAuth(email, password))
{
FormsAuthentication.SetAuthCookie(email, true);
if (shouldRedirect(returnUrl))
{
return Redirect(returnUrl);
}
return RedirectToAction("Index", "Home", new {Area = "FAdmin"});
}
else
{
return RedirectToAction("Index");
}
}
[HttpGet]
public ActionResult LogOut()
{
DomainClass.CMS.User user = _iuserRepository.FindByEmail(User.Identity.Name).First();
user.LastLogin = DateTime.Now;
_iuserRepository.Save();
FormsAuthentication.SignOut();
return RedirectToAction("Index", "Login", new { Area = "FAdmin" });
}
我第一次尝试登录时工作正常但在注销后，当我尝试再次登录时出现此错误：
The operation cannot be completed because the DbContext has been disposed.
在这里，您可以看到我的用户界面和存储库：
public class UserRepository:IUserRepository
{
public CMSDataContext _ctx;
public UserRepository (CMSDataContext ctx)
{
_ctx = ctx;
}
public IQueryable<User> GetUsers()
{
return _ctx.Users;
}
public bool Save()
{
try
{
return _ctx.SaveChanges() > 0;
}
catch (Exception ex)
{
// TODO log this error
return false;
}
}
public bool AddUser(User newUser)
{
try
{
_ctx.Users.Add(newUser);
return true;
}
catch (Exception ex)
{
// TODO log this error
return false;
}
}
public bool Delete(User deletedUser)
{
try
{
_ctx.Users.Remove(deletedUser);
return true;
}
catch (Exception ex)
{
// TODO log this error
return false;
}
}
public bool Edit(User UpdatedValue)
{
try
{
_ctx.Entry(UpdatedValue).State = System.Data.Entity.EntityState.Modified;
return true;
}
catch (Exception ex)
{
// TODO log this error
return false;
}
}
public IQueryable<User> Search(string Value)
{
return _ctx.Users.Where(i => i.Fullname.Contains(Value));
}
public IQueryable<User> FindById(int Id)
{
return _ctx.Users.Where(i => i.Id == Id);
}
public string[] ReturnRole(string Email)
{
string[] res = new string[1];
//res[0] = FindByEmail(Email).First().Permission;
// res[0] = "administrator";//member
User a=_ctx.Users.Where(i => i.Email == Email).ToList().First();
res[0] = a.Permission;
return res;
}
public IQueryable<User> FindByEmail(string Email)
{
return _ctx.Users.Where(i => i.Email == Email);
}
public bool CheckAuth(string Email, string password)
{
try
{
if (_ctx.Users.Where(i => i.Email == Email && i.Password == password && i.Enable=="فعال").Count() == 1)
return true;
else
{
return false;
}
}
catch (Exception ex)
{
// TODO log this error
return false;
}
}
}
这是我的接口：
public interface IUserRepository
{
IQueryable<User> GetUsers();
bool Save();
bool AddUser(User newUser);
bool Delete(User deletedUser);
bool Edit(User UpdatedValue);
IQueryable<User> Search(string Value);
IQueryable<User> FindById(int Id);
IQueryable<User> FindByEmail(string Email);
bool CheckAuth(string Email,string password);
string[] ReturnRole(string Email);
}
这是我的dbcontext：
public class CMSDataContext : DbContext
{
public CMSDataContext()
: base("DefaultConnection")
{
this.Configuration.LazyLoadingEnabled = false;
this.Configuration.ProxyCreationEnabled = false;
Database.SetInitializer(
new MigrateDatabaseToLatestVersion<CMSDataContext, CMSMigrationsConfiguration>()
);
}
public DbSet<User> Users { get; set; }
public DbSet<News> Newses { get; set; }
public DbSet<Configuration> Configurations { get; set; }
public DbSet<Project> Projects { get; set; }
public DbSet<Comment> Comments { get; set; }
public DbSet<CompanyMember> CompnayMembers { get; set; }
public DbSet<Customer> Customers { get; set; }
public DbSet<Gallery> Galleries { get; set; }
public DbSet<Goal> Goals { get; set; }
public DbSet<Menu> Menus { get; set; }
public DbSet<Page> Pages { get; set; }
public DbSet<Partner> Partners { get; set; }
public DbSet<SlideShow> Slideshows { get; set; }
//--------------------------lizing part domain class
public DbSet<Group> Groups { get; set; }
public DbSet<GroupFile> GroupFiles { get; set; }
public DbSet<Request> Requests { get; set; }
public DbSet<RequestFile> RequestFiles { get; set; }
public DbSet<RequestComment> RequestComments { get; set; }
}
我的ninject
using Core.CMS;
using Inf.CMS;
using InfCMSDataLayer;
using Lizing.Inf;
using Lizing.Repository;
using Repository.CMS;
using RepositoryCMS;
[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(MTBCO.App_Start.NinjectWebCommon), "Start")]
[assembly: WebActivatorEx.ApplicationShutdownMethodAttribute(typeof(MTBCO.App_Start.NinjectWebCommon), "Stop")]
namespace MTBCO.App_Start
{
using System;
using System.Web;
using Microsoft.Web.Infrastructure.DynamicModuleHelper;
using Ninject;
using Ninject.Web.Common;
public static class NinjectWebCommon
{
private static readonly Bootstrapper bootstrapper = new Bootstrapper();
/// <summary>
/// Starts the application
/// </summary>
public static void Start()
{
DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
bootstrapper.Initialize(CreateKernel);
}
/// <summary>
/// Stops the application.
/// </summary>
public static void Stop()
{
bootstrapper.ShutDown();
}
/// <summary>
/// Creates the kernel that will manage your application.
/// </summary>
/// <returns>The created kernel.</returns>
private static IKernel CreateKernel()
{
var kernel = new StandardKernel();
try
{
kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
RegisterServices(kernel);
return kernel;
}
catch
{
kernel.Dispose();
throw;
}
}
/// <summary>
/// Load your modules or register your services here!
/// </summary>
/// <param name="kernel">The kernel.</param>
private static void RegisterServices(IKernel kernel)
{
kernel.Bind<CMSDataContext>().To<CMSDataContext>().InRequestScope();
kernel.Bind<IUserRepository>().To<UserRepository>().InRequestScope();
kernel.Bind<INewsRepository>().To<NewsRepository>().InRequestScope();
kernel.Bind<IConfigurationRepository>().To<ConfigurationRepository>().InRequestScope();
kernel.Bind<IGoalRepository>().To<GoalRepository>().InRequestScope();
kernel.Bind<IPartnerRepository>().To<PartnerRepository>().InRequestScope();
kernel.Bind<ICalenderRepository>().To<CalenderRepository>().InRequestScope();
kernel.Bind<ICustomerRepository>().To<CustomerRepository>().InRequestScope();
kernel.Bind<ISlideshowRepository>().To<SlideshowRepository>().InRequestScope();
kernel.Bind<IProjectRepository>().To<ProjectRepository>().InRequestScope();
kernel.Bind<IGalleryRepository>().To<GalleryRepository>().InRequestScope();
kernel.Bind<ICompanyMemberRepository>().To<CompanyMemberRepository>().InRequestScope();
kernel.Bind<ICommentRepository>().To<CommentRepository>().InRequestScope();
kernel.Bind<IPageRepository>().To<PageRepository>().InRequestScope();
kernel.Bind<IMenuRepository>().To<MenuRepository>().InRequestScope();
kernel.Bind<IGroupRepository>().To<GroupRepository>().InRequestScope();
kernel.Bind<IRequestRepository>().To<RequestRepository>().InRequestScope();
kernel.Bind<IRequestFileRepository>().To<RequestFileRepository>().InRequestScope();
kernel.Bind<IGroupFileRepository>().To<GroupFileRepository>().InRequestScope();
kernel.Bind<IRequestCommentRepository>().To<RequestCommentRepository>().InRequestScope();
}
}
}
我的堆栈
[InvalidOperationException: The operation cannot be completed because the DbContext has been disposed.]
System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +762
System.Data.Entity.Internal.Linq.InternalQuery`1.GetEnumerator() +28
System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnumerator() +52
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +369
System.Linq.Enumerable.ToList(IEnumerable`1 source) +58
Repository.CMS.UserRepository.ReturnRole(String Email) +348
MTBCO.MyRoleProvider.GetRolesForUser(String email) +11
System.Web.Security.RolePrincipal.IsInRole(String role) +9625187
System.Linq.Enumerable.Any(IEnumerable`1 source, Func`2 predicate) +146
System.Web.Mvc.AuthorizeAttribute.AuthorizeCore(HttpContextBase httpContext) +197
System.Web.Mvc.AuthorizeAttribute.OnAuthorization(AuthorizationContext filterContext) +159
System.Web.Mvc.ControllerActionInvoker.InvokeAuthorizationFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor) +96
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__1e(AsyncCallback asyncCallback, Object asyncState) +446
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +130
System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction(ControllerContext controllerContext, String actionName, AsyncCallback callback, Object state) +302
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__17(AsyncCallback asyncCallback, Object asyncState) +30
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +130
System.Web.Mvc.Controller.BeginExecuteCore(AsyncCallback callback, Object state) +381
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +130
System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +317
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.BeginExecute(RequestContext requestContext, AsyncCallback callback, Object state) +15
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__2(AsyncCallback asyncCallback, Object asyncState) +71
System.Web.Mvc.Async.WrappedAsyncResult`1.Begin(AsyncCallback callback, Object state, Int32 timeout) +130
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +249
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +49
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +301
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
我终于发现错误发生在userrepository .why？
public string[] ReturnRole(string Email)
{
string[] res = new string[1];
//res[0] = FindByEmail(Email).First().Permission;
// res[0] = "administrator";//member
User a=_ctx.Users.Where(i => i.Email == Email).ToList().First();
res[0] = a.Permission;
return res;
}
答案 0 :(得分：1)
我有同样的问题。更换Ninject模块后
Bind<Context>().ToSelf().InSingletonScope();
与
Bind<Context>().ToSelf();
上下文开始正常工作
答案 1 :(得分：0)
我认为该问题与在IoC容器中注册类型有关。您使用的是什么IoC容器？你如何注册CMSDataContext？也许你应该在AutoFac中使用像InstancePerRequest这样的东西？