运行以下控制器时，我收到上述错误。我有一个不会导致此错误的类似控制器。
仅当我在视图（PostLandingFormEnquiry）中提交表单时，才会发生错误。
堆栈跟踪点将“ LandingPage”作为问题。
您能指出导致错误的原因吗？
namespace TSW.Web.Controllers
{
public class LandingPageSurfaceController : SurfaceController
{
private readonly ISitePageFactory _pageFactory = null;
private readonly IOrderService _orderService = null;
private readonly IConfiguration _config = null;
public LandingPageSurfaceController(ISitePageFactory pageFactory, IOrderService orderService,
IConfiguration config)
{
_pageFactory = pageFactory;
_orderService = orderService;
_config = config;
}
[ChildActionOnly]
public ActionResult ShowLandingEnquiryForm(LandingPageVM Model)
{
var EventList = new List<SelectListItem>();
if (Model.Events.Any())
{
foreach (var events in Model.Events)
{
var Dropdown = events.Start.ToShortDateString() + " - " + "£" + events.NormalPrice.Amount + " + VAT";
var DropdownClean = Dropdown.Remove(Dropdown.IndexOf("."));
EventList.Add(new SelectListItem
{
Value = events.Id.ToString(),
Text = DropdownClean
});
};
}
return PartialView("_LandingEnquiryForm", new LandingEnquiryForm { EventList = EventList });
}
[ChildActionOnly]
public ActionResult ShowContactFormFooter()
{
return PartialView("_ContactFormFooter", new ContactForm { });
}
[HttpPost]
public async Task<ActionResult> PostLandingEnquiryForm(LandingEnquiryForm enquiryForm)
{
var homepage = _pageFactory.GetCurrentHomepage();
if (!ModelState.IsValid)
{
return CurrentUmbracoPage();
}
await _orderService.SaveLandingEnquiry(CreateLandingPageForm(enquiryForm));
return RedirectToUmbracoPage(homepage.EnquirySuccessPage);
/*string EncodedResponse = Request.Form["g-Recaptcha-Response"];
bool IsCaptchaValid = (ReCaptchaClass.Validate(EncodedResponse) == "true" ? true : false);
if (IsCaptchaValid)
{
await _orderService.SaveCourseEnquiry(CreateCourseEnquiryForm(contactForm));
return RedirectToUmbracoPage(homepage.EnquirySuccessPage);
}
else
{
return RedirectToCurrentUmbracoPage();
}*/
}
private LandingPageRequest CreateLandingPageForm(LandingEnquiryForm enquiryForm)
{
HttpContext context = System.Web.HttpContext.Current;
var campaign = (string)(context.Session["gclid"]);
var opps = new List<Opportunity>();
opps.Add(new Opportunity()
{
EventId = new EventBooking
{
Id = enquiryForm.EventId
},
Quantity = 1,
TaxType = new TaxType
{
Id = 1,
Name = "UK VAT",
Rate = 20
},
RegionCode = "WAL",
});
DateTime d = DateTime.UtcNow.Date;
var landingEnquiry = new LandingPageRequest
{
Opportunities = opps,
Name = string.Format("Landing page Enquiry - {1} - {0}", enquiryForm.CompanyName, d.ToString("D")),
SourceType = _config.OpportunitySourceType,
CompanyId = _config.OpportunityCompanyId,
Step = _config.EnquiryStepId,
Currency = _config.OpportunityCurrency,
UserId = _config.EnquiryUserId,
OpportunityContact =
new Contact
{
CompanyName = enquiryForm.CompanyName,
Name = enquiryForm.ContactName,
Email = enquiryForm.ContactEmail,
Phone = enquiryForm.ContactNo,
OrderDateTime = DateTime.Now,
PPC = campaign,
},
MarketingActivityId = _config.EnquiryMarketingActivityId
};
return landingEnquiry;
}
}
public class LandingPageController : BaseRenderController<LandingPageDT>
{
private readonly ISitePageFactory _pageFactory = null;
private readonly IConfiguration _config = null;
private readonly IEventService _eventService = null;
public LandingPageController()
: this(
ServiceLocator.Current.GetInstance<ISitePageFactory>(),
ServiceLocator.Current.GetInstance<IEventService>(),
ServiceLocator.Current.GetInstance<IConfiguration>())
{
}
public LandingPageController(ISitePageFactory pageFactory, IEventService eventService, IConfiguration config)
{
_config = config;
_pageFactory = pageFactory;
_eventService = eventService;
}
[OutputCache(CacheProfile = "Cache1Hour")]
public async Task<ActionResult> LandingPage()
{
var homepage = _pageFactory.GetCurrentHomepage();
var model = Mapper.Map<LandingPageVM>(CurrentContent);
model.Email = homepage.ContactEmail;
model.PhoneNumber = homepage.HeaderPhoneNumber;
model.InnerPageHeader.ShowHeading = true;
model.InnerPageHeader.Title = model.PageTitle;
model.InnerPageHeader.Duration = model.Duration;
var sources = new List<string>();
foreach (var source in model.SourceTypes)
{
sources.Add(source.SourceName);
}
if (CurrentContent.Graphic != 0)
{
model.InnerPageHeader.Graphic = Mapper.Map<CtaItem>(CurrentContent.Graphic);
}
ViewBag.SourceList = sources.Select(f => new SelectListItem() { Value = f, Text = f, });
try
{
model.Events = await _eventService.GetEventsForCourse(CurrentContent.AdministrateId);
}
catch (Exception ex)
{
model.Events = new StaticPagedList<Event>(Enumerable.Empty<Event>(), 1, 1, 0);
Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}
return View(model);
}
}
}
编辑1：堆栈跟踪
[InvalidOperationException: The asynchronous action method 'LandingPage' returns a Task, which cannot be executed synchronously.]
System.Web.Mvc.Async.TaskAsyncActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +140
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +80
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +454
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +454
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +454
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +973
System.Web.Mvc.Controller.ExecuteCore() +128
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +235
Umbraco.Web.Mvc.UmbracoPageResult.ExecuteControllerAction(ControllerContext context, IController controller) +104
Umbraco.Web.Mvc.UmbracoPageResult.ExecuteResult(ControllerContext context) +385
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +88
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +775
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +775
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +775
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81
System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +188
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +43
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +602
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +195
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +128
有效的控制器
namespace TSW.Web.Controllers
{
public class CourseEnquiryPageSurfaceController : SurfaceController
{
private readonly ISitePageFactory _pageFactory = null;
private readonly IOrderService _orderService = null;
private readonly IConfiguration _config = null;
public CourseEnquiryPageSurfaceController(ISitePageFactory pageFactory, IOrderService orderService,
IConfiguration config)
{
_pageFactory = pageFactory;
_orderService = orderService;
_config = config;
}
[ChildActionOnly]
public ActionResult ShowCourseEnquiryForm()
{
return PartialView("_CourseEnquiryForm", new CourseEnquiryForm {});
}
[ChildActionOnly]
public ActionResult ShowContactFormFooter()
{
return PartialView("_ContactFormFooter", new ContactForm { });
}
[HttpPost]
public async Task<ActionResult> PostCourseEnquiryForm(CourseEnquiryForm contactForm)
{
var homepage = _pageFactory.GetCurrentHomepage();
if (!ModelState.IsValid)
{
return CurrentUmbracoPage();
}
string EncodedResponse = Request.Form["g-Recaptcha-Response"];
bool IsCaptchaValid = (ReCaptchaClass.Validate(EncodedResponse) == "true" ? true : false);
if (IsCaptchaValid)
{
await _orderService.SaveCourseEnquiry(CreateCourseEnquiryForm(contactForm));
return RedirectToUmbracoPage(homepage.EnquirySuccessPage);
}
else
{
return RedirectToCurrentUmbracoPage();
}
}
private EnquiryRequest CreateCourseEnquiryForm(CourseEnquiryForm contactForm)
{
HttpContext context = System.Web.HttpContext.Current;
var campaign = (string)(context.Session["gclid"]);
var opps = new List<Interest>();
opps.Add(new Interest()
{
CourseId = new CourseBooking
{
Id = contactForm.Course
},
Quantity = contactForm.Quantity,
TaxType = new TaxType
{
Id = 1,
Name = "UK VAT",
Rate = 20
},
RegionCode = "WAL",
});
DateTime d = DateTime.UtcNow.Date;
var courseEnquiry = new EnquiryRequest
{
Opportunities = opps,
Name = string.Format("Course Enquiry - {1} - {0}", contactForm.CompanyName, d.ToString("D")),
SourceType = _config.OpportunitySourceType,
CompanyId = _config.OpportunityCompanyId,
Step = _config.EnquiryStepId,
Currency = _config.OpportunityCurrency,
UserId = _config.EnquiryUserId,
OpportunityContact =
new Contact
{
CompanyName = contactForm.CompanyName,
Name = contactForm.Name,
Email = contactForm.Email,
Phone = contactForm.ContactNo,
WebSource = contactForm.Source,
OrderDateTime = DateTime.Now,
OtherCourses = contactForm.OtherCourses,
PPC = campaign,
},
MarketingActivityId = _config.EnquiryMarketingActivityId
};
return courseEnquiry;
}
}
public class CourseEnquiryPageController : BaseRenderController<CourseEnquiryPageDT>
{
private readonly ISitePageFactory _pageFactory = null;
private readonly IConfiguration _config = null;
public CourseEnquiryPageController()
: this(
ServiceLocator.Current.GetInstance<ISitePageFactory>(),
ServiceLocator.Current.GetInstance<IConfiguration>())
{
}
public CourseEnquiryPageController(ISitePageFactory pageFactory, IConfiguration config)
{
_config = config;
_pageFactory = pageFactory;
}
[OutputCache(CacheProfile = "Cache1Hour")]
public ActionResult CourseEnquiry()
{
var model = Mapper.Map<CourseEnquiryVM>(CurrentContent);
model.InnerPageHeader.ShowHeading = true;
model.InnerPageHeader.Title = model.PageTitle;
model.InnerPageHeader.Description = CurrentContent.HeadingSummaryText;
var sources = new List<string>();
foreach (var source in model.SourceTypes)
{
sources.Add(source.SourceName);
}
ViewBag.SourceList = sources.Select(f => new SelectListItem() { Value = f, Text = f, });
if (CurrentContent.Graphic != 0)
{
model.InnerPageHeader.Graphic = Mapper.Map<CtaItem>(CurrentContent.Graphic);
}
return View(model);
}
}
}