I am getting an exception error when running the my ASP.NET web application,

Question

Hello, I am getting an exception error when running the my ASP.NET web application. I think it has to due my an enum by I am not sure.

Server Error in '/' Application.
________________________________________
Value cannot be null.
Parameter name: source
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: source

Source Error:

Line 8: <h1>ASP.NET</h1>
Line 9: <div>
Line 10: There are @Model.Count() restaurants in the db.
Line 11: </div>
Line 12:

Source File: C:\Users\cef19\source\repos\OdeToFood\OdeToFood.Web\Views\Home\Index.cshtml Line: 10

Stack Trace:

[ArgumentNullException: Value cannot be null.
Parameter name: source]
System.Linq.Enumerable.Count(IEnumerable`1 source) +4960432
ASP._Page_Views_Home_Index_cshtml.Execute() in C:\Users\cef19\source\repos\OdeToFood\OdeToFood.Web\Views\Home\Index.cshtml:10
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +105
System.Web.WebPages.StartPage.RunPage() +17
System.Web.WebPages.StartPage.ExecutePageHierarchy() +73
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +78
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.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContex

Answer 1

This might help you

https://docs.microsoft.com/en-us/aspnet/web-forms/overview/getting-started/getting-started-with-aspnet-45-web-forms/aspnet-error-handling

//Post programming related questions only.

Answer 2

David Carroll sir thanks for informing me :)

Love Coding nice of you that you figured out ;)

Answer 3

Love Coding Was it a routing parameter in your controller? Either way, glad you figured it out. 👌

Aditya A tip for you regarding that link you shared...

That link was for the much older ASP.NET Web Forms. However, the call stack indicates this was for ASP.NET MVC. 😉

Answer 4

I figured it out. I forget to Add a parameter in the controller. I added it and that fixed the problem.