路径中有非法字符。在使用IEnumerable时，使用Skip和Take出错。

Question

您好，我在我的控制器中有以下操作：

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Index()
{
    IEnumerable<SurveyResult> myresult = filterData();
    totalCount = myresult.Count<SurveyResult>();
    ViewBag.totalCount = totalCount;
    //myresult = myresult.Skip<SurveyResult>(100 * pageIndex).Take<SurveyResult>(100);
    return View(myresult);
}

这里是我的观点。

@model IEnumerable<SurveyResult>
@{
    ViewBag.Title = "Survey Results";
}
@using (Html.BeginForm())
{

    <table class="std-tbl">
        <thead>
            <tr>
                <th>
                    DEL
                </th>
                ...

                <th>
                </th>
            </tr>
        </thead>
        @Html.DisplayFor(x => x, new { pageIndex = ViewBag.index })
    </table>
}

我有一个关于SurveyResult的部分视图，但我没有包含它，因为我认为它不相关。这是我的问题。上面的代码运行良好，但只要我取消注释以下行：

myresult = myresult.Skip<SurveyResult>(100 * pageIndex).Take<SurveyResult>(100);

我收到了"Illegal characters in path."错误提示。我认为它无法找到SurveyResult的partialView。但是我不明白为什么当上面的那一行被注释掉时，它可以找到它，但是当它取消注释时就不能找到它了？谢谢。

以下是我的堆栈跟踪信息：

[ArgumentException: Illegal characters in path.]
   System.IO.Path.CheckInvalidPathChars(String path) +126
   System.IO.Path.Combine(String path1, String path2) +38
   System.Web.Compilation.DiskBuildResultCache.GetPreservedDataFileName(String cacheKey) +27
   System.Web.Compilation.DiskBuildResultCache.GetBuildResult(String cacheKey, VirtualPath virtualPath, Int64 hashCode, Boolean ensureIsUpToDate) +14
   System.Web.Compilation.BuildManager.GetBuildResultFromCacheInternal(String cacheKey, Boolean keyFromVPP, VirtualPath virtualPath, Int64 hashCode, Boolean ensureIsUpToDate) +200
   System.Web.Compilation.BuildManager.GetVPathBuildResultFromCacheInternal(VirtualPath virtualPath, Boolean ensureIsUpToDate) +51
   System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +68
   System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) +111
   System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound) +125
   System.Web.Mvc.BuildManagerWrapper.System.Web.Mvc.IBuildManager.FileExists(String virtualPath) +29
   System.Web.Mvc.BuildManagerViewEngine.FileExists(ControllerContext controllerContext, String virtualPath) +41
   System.Web.Mvc.VirtualPathProviderViewEngine.GetPathFromGeneralName(ControllerContext controllerContext, List`1 locations, String name, String controllerName, String areaName, String cacheKey, String[]& searchedLocations) +150
   System.Web.Mvc.VirtualPathProviderViewEngine.GetPath(ControllerContext controllerContext, String[] locations, String[] areaLocations, String locationsPropertyName, String name, String controllerName, String cacheKeyPrefix, Boolean useCache, String[]& searchedLocations) +304
   System.Web.Mvc.VirtualPathProviderViewEngine.FindPartialView(ControllerContext controllerContext, String partialViewName, Boolean useCache) +130
   System.Web.Mvc.<>c__DisplayClass8.<FindPartialView>b__7(IViewEngine e) +21
   System.Web.Mvc.ViewEngineCollection.Find(Func`2 lookup, Boolean trackSearchedPaths) +127
   System.Web.Mvc.ViewEngineCollection.FindPartialView(ControllerContext controllerContext, String partialViewName) +170
   System.Web.Mvc.Html.TemplateHelpers.ExecuteTemplate(HtmlHelper html, ViewDataDictionary viewData, String templateName, DataBoundControlMode mode, GetViewNamesDelegate getViewNames, GetDefaultActionsDelegate getDefaultActions) +418
   System.Web.Mvc.Html.TemplateHelpers.TemplateHelper(HtmlHelper html, ModelMetadata metadata, String htmlFieldName, String templateName, DataBoundControlMode mode, Object additionalViewData, ExecuteTemplateDelegate executeTemplate) +1117
   System.Web.Mvc.Html.TemplateHelpers.TemplateHelper(HtmlHelper html, ModelMetadata metadata, String htmlFieldName, String templateName, DataBoundControlMode mode, Object additionalViewData) +66
   System.Web.Mvc.Html.TemplateHelpers.TemplateFor(HtmlHelper`1 html, Expression`1 expression, String templateName, String htmlFieldName, DataBoundControlMode mode, Object additionalViewData, TemplateHelperDelegate templateHelper) +117
   System.Web.Mvc.Html.TemplateHelpers.TemplateFor(HtmlHelper`1 html, Expression`1 expression, String templateName, String htmlFieldName, DataBoundControlMode mode, Object additionalViewData) +100
   System.Web.Mvc.Html.DisplayExtensions.DisplayFor(HtmlHelper`1 html, Expression`1 expression, Object additionalViewData) +57
   ASP._Page_Views_SurveyResult_Index_cshtml.Execute() in c:\Source\Test\Admin\Views\SurveyResult\Index.cshtml:163
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +207
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +81
   System.Web.WebPages.StartPage.RunPage() +19
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +65
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +76
   System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +220
   System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +303
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
   System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +260
   System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +19
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +177
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343
   System.Web.Mvc.Controller.ExecuteCore() +116
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
   System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +37
   System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +21
   System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +12
   System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
   System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +50
   System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
   System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8969117
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184

Here is the source Error:

第161行： 第162行： 第163行：@Html.DisplayFor(x => x, new { pageIndex = ViewBag.index }) 第164行： 第165行：

- atbebtg

---

只是提供信息（与您的问题无关），在大多数情况下，您不需要提供通用类型参数，它可以从“IEnumerable”的类型中推断出来。 - Michael Edenfield

@MichaelEdenfield 我刚刚改成只是跳过或取出，但两者都出现了相同的错误。 - atbebtg

是的，错误肯定是因为你从LINQ获取了一个真正的类，参见@SLaks的答案。 - Michael Edenfield

Answer 1

DisplayFor 正在寻找以EF生成的实现类名称命名的视图，但该名称包含非法字符。

尝试在控制器中调用.ToList()。

- SLaks

---

因为此时类型是 DbSet<T>，这个命名非常合适。 - SLaks

这与惰性加载有关吗？ - Phil

@Phil：可能会。我不确定 EF 在什么情况下会生成自己的类。 - SLaks

ToList() 调用对我也起了作用，但不是因为 EF 类。而是由于视图模型中 yield 块生成的匿名类。请参见我的答案：https://dev59.com/hF4c5IYBdhLWcg3w1dLx#27800743。 - CSJ

真奇怪！我遇到了这个问题，但只在iPad的Safari浏览器上出现。其他所有浏览器，包括iPad上的Chrome都没有问题。 - David Hyde