Шаблоны можно использовать только с доступом к полям, доступом к свойствам, ошибкой индекса одномерного массива. ⇐ C#

[Anonymous]

У меня есть такая модель:
public partial class ClassTime
{
public int Id { get; set; }
public int ScheduleId { get; set; }
public System.TimeSpan StartClassTime { get; set; }
public System.TimeSpan FinishClassTime { get; set; }
public string ClassDay { get; set; }

public virtual Schedule Schedule { get; set; }
}

Итак, с этим методом репозитория:
public string ReturnPersianDay(int id)
{
if (id == 1) return "شنبه";
if (id == 2) return "یکشنبه";
if (id == 3) return "دوشنبه";
if (id == 4) return "سه شنبه";
if (id == 5) return "چهارشنبه";
if (id == 6) return "پنج شنبه";
if (id == 7) return "جمعه";
else return "نامشخص";
}

на мой взгляд, я вызываю этот метод, как вы можете видеть здесь:
@foreach (var item in Model) {


@Html.DisplayFor(modelItem => item.ScheduleId)


@Html.DisplayFor(modelItem => item.StartClassTime)


@Html.DisplayFor(modelItem => item.FinishClassTime)

@{EducationRepositor.ClassTimeRepository objclasstime=new ClassTimeRepository();

}

@Html.DisplayFor(modelItem => objclasstime.ReturnPersianDay(int.Parse(item.ClassDay)))

@Html.ActionLink("Edit", "Edit", new { id=item.Id }) |
@Html.ActionLink("Delete", "Delete", new { id=item.Id })


}

Но я получаю эту ошибку:
Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.

Трассировка стека:
[InvalidOperationException: Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.]
System.Web.Mvc.ModelMetadata.FromLambdaExpression(Expression`1 expression, ViewDataDictionary`1 viewData, ModelMetadataProvider metadataProvider) +556
System.Web.Mvc.ModelMetadata.FromLambdaExpression(Expression`1 expression, ViewDataDictionary`1 viewData) +54
System.Web.Mvc.Html.TemplateHelpers.TemplateFor(HtmlHelper`1 html, Expression`1 expression, String templateName, String htmlFieldName, DataBoundControlMode mode, Object additionalViewData, TemplateHelperDelegate templateHelper) +68
System.Web.Mvc.Html.TemplateHelpers.TemplateFor(HtmlHelper`1 html, Expression`1 expression, String templateName, String htmlFieldName, DataBoundControlMode mode, Object additionalViewData) +104
System.Web.Mvc.Html.DisplayExtensions.DisplayFor(HtmlHelper`1 html, Expression`1 expression) +61
ASP._Page_Views_ClassTime_Index_cshtml.Execute() in e:\Projects migration to Qazvin\ziafat\EducationModel\EducationMVC\Views\ClassTime\Index.cshtml:45
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +103
System.Web.WebPages.StartPage.RunPage() +17
System.Web.WebPages.StartPage.ExecutePageHierarchy() +62
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +76
System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +235
System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +107
System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +291
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
System.Web.Mvc.c__DisplayClass1a.b__17() +23
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +245
System.Web.Mvc.c__DisplayClass1c.b__19() +22
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +176
System.Web.Mvc.Async.c__DisplayClass2a.b__20() +75
System.Web.Mvc.Async.c__DisplayClass25.b__22(IAsyncResult asyncResult) +99
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
System.Web.Mvc.c__DisplayClass1d.b__18(IAsyncResult asyncResult) +14
System.Web.Mvc.Async.c__DisplayClass4.b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +39
System.Web.Mvc.Async.c__DisplayClass4.b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
System.Web.Mvc.c__DisplayClass8.b__3(IAsyncResult asyncResult) +25
System.Web.Mvc.Async.c__DisplayClass4.b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +31
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9629708
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155


Подробнее здесь: https://stackoverflow.com/questions/236 ... -dimension