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Start your free trialHuy Tran
344 PointsObject reference not set to an instance of an Object
HomeController.cs
namespace net.Controllers
{
public class HomeController : Controller
{
public ActionResult Detail()
{
var home = new ComicBooks()
{
Artists = new Artist[]
{
new Artist() { Name = "Dan Slott", Role="Script" },
new Artist() { Name = "Humberto Ramos", Role="Pencils"},
new Artist() { Name = "Victor Olazaba", Role="Inks"},
new Artist() { Name = "Edgar Delgado", Role="Colors"},
new Artist() { Name = "Chris Eliopoulos", Role="Letters"},
}
};
Console.WriteLine(home.Artists.Length);
return View(home);
}
}
}
ComicBooks.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace net.Models
{
public class ComicBooks
{
public int Id{get;set;}
public string SeriesTitle{get;set;}
public int IssueNumber{get;set;}
public string DescriptionHTMl{get;set;}
public Artist[] Artists {get; set;}
public bool Favorite { get; set;}
public string DisplayText
{
get
{
return SeriesTitle + " #" + IssueNumber;
}
}
public string CoverImageFiles
{
get
{
return SeriesTitle.Replace(" ","-").ToLower() + "-" + IssueNumber + ".jpg";
}
}
}
}
Detail.cshtml
@page
@model net.Models.ComicBooks
@{
Layout = "~/Views/Shared/_Layout.cshtml";
var description = "<p>Final issue! Witness the final hours of Doctor Octopus' life and his one, last, great act of revenge! Even if Spider-Man survives... <strong>will Peter Parker?</strong></p>";
}
<div>
@Html.Raw(description)
</div>
<div>
<ul>
@foreach(var artist in Model.Artists)
{
<li>
@artist.Name
</li>
}
</ul>
</div>
I am using asp.net core 2.0. Keep getting this error for some reason, Please help
Huy Tran
344 PointsMicrosoft.AspNetCore.Server.Kestrel[13]
Connection id "0HLC95AVGB5OA", Request id "0HLC95AVGB5OA:00000002": An unhandled exception was thrown by the application.
System.NullReferenceException: Object reference not set to an instance of an object.
at AspNetCore._Views_Home_Detail_cshtml.get_Model()
at AspNetCore._Views_Home_Detail_cshtml.<ExecuteAsync>d__0.MoveNext() in /Users/MaiKhoi/Documents/net/Views/Home/Detail.cshtml:line 15
So the error come from this line
@foreach(var artist in Model.Artists)
Steven Parker
231,198 PointsHuy Tran — did you ever resolve this?
1 Answer
Amar Resic
2,922 PointsI'm having the same problem but in the if statement @if (Model.Artists.Length > 0).
Steven Parker
231,198 PointsSteven Parker
231,198 PointsThe entire error message should identify a file, line and column. What's the rest of it?