Server Error in '/' Application.

Object reference not set to an instance of an object.

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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:


Line 1538:    @(new HtmlString("<meta property='og:description' content='" + @Model.DescriptionTag.Left(200) + "'/> "))
Line 1539:    @(new HtmlString("<meta property='og:url' content='//bookbuy.vn" + @Model.Link + "' />"))
Line 1540:    @(new HtmlString("<meta property='og:image' content='//bookbuy.vn/Res/Images/" + @ResPath.Product + "/" + (Model.Images.Count > 0 ? Model.Images[0].URL : "default-img.png") + "?w=200&h=200&mode=canvas' />"))
Line 1541:    <meta property="og:site_name" content="bookbuy.vn" />
Line 1542:    <meta property="og:type" content="website" />

Source File: d:\wwwroot\BookBuy\Views\BookBuy\ProductDetail.cshtml    Line: 1540

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   ASP._Page_Views_BookBuy_ProductDetail_cshtml.<Execute>b__f() in d:\wwwroot\BookBuy\Views\BookBuy\ProductDetail.cshtml:1540
   System.Web.WebPages.<>c__DisplayClassb.<RenderSection>b__9(TextWriter tw) +413
   System.Web.WebPages.WebPageBase.Write(HelperResult result) +107
   ASP._Page_Views_Shared__FrontEndTop_cshtml.Execute() in d:\wwwroot\BookBuy\Views\Shared\_FrontEndTop.cshtml:14
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +251
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +146
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +121
   System.Web.WebPages.<>c__DisplayClass7.<RenderPageCore>b__6(TextWriter writer) +303
   System.Web.WebPages.WebPageBase.Write(HelperResult result) +107
   System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body) +87
   System.Web.WebPages.WebPageBase.PopContext() +348
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +377
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +30
   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:4.8.4110.0