c# – 在ASP.net MVC 5中为模型创建隐藏字段时出错

我试图在部分视图中为模型渲染一个隐藏字段,这是一个枚举

我的代码是

@model App.PrivacyLevelEnum
@Html.HiddenFor(m=>m);

我已经检查过模型不是空的但我在渲染视图时遇到了跟踪错误

Value cannot be null or empty.\r\nParameter name: name

Stack trace

   at System.Web.Mvc.Html.InputExtensions.InputHelper(HtmlHelper htmlHelper,InputType inputType,ModelMetadata Metadata,String name,Object value,Boolean useViewData,Boolean isChecked,Boolean setId,Boolean isExplicitValue,String format,IDictionary`2 htmlAttributes)
   at System.Web.Mvc.Html.InputExtensions.HiddenHelper(HtmlHelper htmlHelper,String expression,IDictionary`2 htmlAttributes)
   at System.Web.Mvc.Html.InputExtensions.HiddenFor[TModel,TProperty](HtmlHelper`1 htmlHelper,Expression`1 expression,Expression`1 expression)
   at ASP._Page_Views_Profile_PrivacyLevel_cshtml.Execute() in c:\TFS\DEFAULTCOLLECTION\Gac.Hr\Development\Source\Gac.Hr.Web.Html5\Views\Profile\PrivacyLevel.cshtml:line 58
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext,TextWriter writer,WebPageRenderingBase startPage)
   at System.Web.Mvc.RazorView.RenderView(ViewContext viewContext,Object instance)
   at System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext,TextWriter writer)
   at System.Web.Mvc.HtmlHelper.RenderPartialInternal(String partialViewName,ViewDataDictionary viewData,Object model,ViewEngineCollection viewEngineCollection)
   at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper,String partialViewName,ViewDataDictionary viewData)
   at ASP._Page_Views_Profile_ProfileDetailsEditor_cshtml.Execute() in c:\TFS\DEFAULTCOLLECTION\Gac.Hr\Development\Source\Gac.Hr.Web.Html5\Views\Profile\ProfileDetailsEditor.cshtml:line 107
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy()
   at System.Web.Mvc.WebViewPage.ExecutePageHierarchy()
   at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext,TextWriter writer)
   at GacHrUI.Controllers.ProfileController.StringifyView(String viewName,Object model) in c:\TFS\DEFAULTCOLLECTION\Gac.Hr\Development\Source\Gac.Hr.Web.Html5\Controllers\ProfileController.cs:line 62
   at GacHrUI.Controllers.ProfileController.RenderEditMode() in c:\TFS\DEFAULTCOLLECTION\Gac.Hr\Development\Source\Gac.Hr.Web.Html5\Controllers\ProfileController.cs:line 35
   at lambda_method(Closure,ControllerBase,Object[] )
   at System.Web.Mvc.ActionMethoddispatcher.Execute(ControllerBase controller,Object[] parameters)
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext,IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext,ActionDescriptor actionDescriptor,IDictionary`2 parameters)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.ActionInvocation.InvokeSynchronousActionMethod()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.b__39(IAsyncResult asyncResult,ActionInvocation innerInvokeState)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncResultWrapper.WrappedAsyncResultBase`1.End()
   at System.Web.Mvc.Async.AsyncResultWrapper.End[TResult](IAsyncResult asyncResult,Object tag)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult)
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.b__3d()
   at System.Web.Mvc.Async.AsyncControllerActionInvoker.AsyncInvocationWithFilters.c__displayClass46.b__3f()

快速帮助将非常感激

解决方法

由于model数据类型是枚举而不是具有属性的类,因此在显示中使用时必须指定名称和ID.

@Html.Hidden("privacyLevel",Model,new { @id="privacyLevel"})