系统中缺少方法。网状物Http。ApiController。get_请求()

我有一个控制器。

    public sealed class AccountsController : BaseApiController
    {
        private readonly IDatabaseAdapter _databaseAdapter;
        public AccountsController(IDatabaseAdapter databaseAdapter)
        {
            _databaseAdapter = databaseAdapter;
        }

        [AllowAnonymous]
        [Route("create")]
        public async Task<IHttpActionResult> CreateUser(CreateUserBindingModel createUserModel)
        {
            if (!ModelState.IsValid)
                return BadRequest(ModelState);
            if (! await _databaseAdapter.DoesAgentExist(createUserModel.UserName))
                return BadRequest();
            if (await _databaseAdapter.DoesAgentHaveAccount(createUserModel.UserName))
                return BadRequest();

            // Create account.
            var password = PasswordHelper.GeneratePassword(32);
            createUserModel.Password = password;
            createUserModel.ConfirmPassword = password;
            var user = new ApplicationUser
            {
                UserName = createUserModel.UserName,
            };
            var addUserResult = await AppUserManager.CreateAsync(user, createUserModel.Password);
            if (!addUserResult.Succeeded)
                return GetErrorResult(addUserResult);
            var locationHeader = new Uri(Url.Link("GetUserById", new { id = user.Id }));
            return Created(locationHeader, ModelFactory.Create(user));
        }
    }

http://localhost:59430/api/accounts/create 用户代理:Fiddler

内容类型:应用程序/json接受:应用程序/json主机: 本地主机:59430内容长度:106

{“UserName”:“a.xxxxx”,“Password”:“xxxxxx”,

具体到以下几行:

var addUserResult = await AppUserManager.CreateAsync(user, createUserModel.Password);

然后出现以下异常

{“message”:“发生错误。”,“exceptionMessage”:“方法 未找到:'系统。网Http。HttpRequestMessage 系统网状物Http。ApiController。get_Request()'。“,”exceptionType“: “System.MissingMethodException”,“stackTrace”:“at” WebAuth。控制器。BaseApicController。get\u AppUserManager()\r\n位于 WebAuth。控制器。会计控制人。d__3。MoveNext()输入 C: \用户\艺术\文档\ Visual Studio 2017\Projects\WebAuth\WebAuth\Controllers\accountscocontroller。cs:线路 76\r\n---exception所在的上一个位置的堆栈结束跟踪 被抛出---\r\n 系统运行时。编译器服务。任务等待者。ThrowForNonSuccess(任务 任务\r\n位于 系统运行时。编译器服务。任务等待者。HandleNonSuccessAndDebuggerNotification(任务 系统穿线。任务。TaskHelpersExtensions。d_3'1。MoveNext()\r\n--- 来自引发异常的前一个位置的堆栈结束跟踪 ---\在系统上。运行时。编译器服务。任务等待者。ThrowForNonSuccess(任务 任务\r\n位于 系统运行时。编译器服务。任务等待者。HandleNonSuccessAndDebuggerNotification(任务 系统网状物Http。控制器。ApiControllerActionInvoker。d__0。MoveNext()\r\n--- ---\在系统上。运行时。编译器服务。任务等待者。ThrowForNonSuccess(任务 系统运行时。编译器服务。任务等待者。HandleNonSuccessAndDebuggerNotification(任务 任务\r\n位于 系统网状物Http。控制器。ActionFilterResult。d__2。MoveNext()\r\n--- ---\在系统上。运行时。编译器服务。任务等待者。ThrowForNonSuccess(任务 任务\r\n位于 系统运行时。编译器服务。任务等待者。HandleNonSuccessAndDebuggerNotification(任务 任务\r\n位于 系统网状物Http。调度员。HttpControllerDispatcher。d__1。MoveNext()“ }

有人知道发生了什么吗?我不知道为什么它找不到那种方法。

我的垃圾箱文件夹包含

系统网状物Http。dll 系统网Http。dll

ApplicationUserManager

public sealed class ApplicationUserManager : UserManager<ApplicationUser>
    {
        public ApplicationUserManager(IUserStore<ApplicationUser> store) : base(store)
        {
        }
        public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options,
                                                    IOwinContext context)
        {
            var appDbContext = context.Get<ApplicationDbContext>();
            var appUserManager = new ApplicationUserManager(new UserStore<ApplicationUser>(appDbContext));

            appUserManager.UserValidator = new UserValidator<ApplicationUser>(appUserManager)
            {
                AllowOnlyAlphanumericUserNames = true,
                RequireUniqueEmail = false,
            };
            appUserManager.PasswordValidator = new PasswordValidator
            {
                RequiredLength = 12,
                RequireNonLetterOrDigit = true,
                RequireUppercase = true,
                RequireLowercase = true,
                RequireDigit = true
            };
            appUserManager.MaxFailedAccessAttemptsBeforeLockout = 3;
            appUserManager.DefaultAccountLockoutTimeSpan = TimeSpan.FromHours(1);
            return appUserManager;
        }
    }

BaseApicController

public class BaseApiController : ApiController
    {
        private ModelFactory _modelFactory;
        private readonly ApplicationUserManager _applicationUserManager = null;
        protected ApplicationUserManager AppUserManager => _applicationUserManager ?? Request.GetOwinContext().GetUserManager<ApplicationUserManager>();
        protected ModelFactory ModelFactory => _modelFactory ?? (_modelFactory = new ModelFactory(Request, AppUserManager));
        protected IHttpActionResult GetErrorResult(IdentityResult result)
        {
            if (result == null)
                return InternalServerError();

            if (result.Succeeded) return null;

            if (result.Errors != null)
                foreach (var error in result.Errors)
                    ModelState.AddModelError(string.Empty, error);

            if (ModelState.IsValid)
                return BadRequest();

            return BadRequest(ModelState);
        }
        private readonly ApplicationRoleManager _appRoleManager = null;
        protected ApplicationRoleManager AppRoleManager => _appRoleManager ?? Request.GetOwinContext().GetUserManager<ApplicationRoleManager>();
    }