Server Error in '/' Application.

Value cannot be null.
Parameter name: value

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: value

Source Error:


Line 19: 	
Line 20:     string tagToFind = Request.QueryString["tag"];
Line 21:     var items = newsItems.Where(x => x.GetPropertyValue("blogTags") != null && x.GetPropertyValue<string>("blogTags").Contains(tagToFind));
Line 22: }
Line 23: @foreach (var item in items)

Source File: c:\inetpub\wwwroot\PencnwcWebsite\Views\Partials\TagsQueryList.cshtml    Line: 21

Stack Trace:


[ArgumentNullException: Value cannot be null.
Parameter name: value]
   System.String.IndexOf(String value, Int32 startIndex, Int32 count, StringComparison comparisonType) +405
   CallSite.Target(Closure , CallSite , Object , String ) +121
   System.Dynamic.UpdateDelegates.UpdateAndExecute2(CallSite site, T0 arg0, T1 arg1) +253
   ASP.<>c__DisplayClass31.<Execute>b__30(Object x) in c:\inetpub\wwwroot\PencnwcWebsite\Views\Partials\TagsQueryList.cshtml:21
   System.Linq.WhereEnumerableIterator`1.MoveNext() +130
   ASP._Page_Views_Partials_TagsQueryList_cshtml.Execute() in c:\inetpub\wwwroot\PencnwcWebsite\Views\Partials\TagsQueryList.cshtml:23
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +147
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +122
   Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer) +200
   System.Web.Mvc.Html.RenderPartialExtensions.RenderPartial(HtmlHelper htmlHelper, String partialViewName) +99
   ASP._Page_Views_Tags_cshtml.Execute() in c:\inetpub\wwwroot\PencnwcWebsite\Views\Tags.cshtml:12
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +147
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer) +200
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +378
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +31
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +448
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +448
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +187
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +30
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +44
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +25
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0