Getting Object reference not set to an instance of an object C#?

Question

i am getting Getting Object reference not set to an instance of an object error
my code and the image are attached below

   public class Backlogitem
        {
            public string Name { get; set; }
            public int ID { get; set; }

            public string State { get; set; }
           // public DateTime? due { get; set; }
            public int priorty { get; set; }
            public int Size { get; set; }
          //  public int effort { get; set; }
            public int StoryPoints { get; set; }
            public string DoneStatus { get; set; }
            public string StoryOwner { get; set; }
            public string Assignedto { get; set; }
            public string StoryAuthor { get; set; }
            public string IterationPath { get; set; }

        }

workitemlist image
rest of the code is pasted here
https://github.com/akhiljain1611/TFS/blob/master/README.md

Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Ňɏssa Pøngjǣrdenlarp, Feb 18 '18 at 15:36
According to the highlighted line it's either `workItemList` that is null or the last item in the `workItemList` or the `PBacklog` inside that last item in the `workItemList` — Dee J. Doena, Feb 18 '18 at 15:38
You should share the code around `workItemList`. Is it initialized? Or `PBacklog`? — FaizanHussainRabbani, Feb 18 '18 at 15:50
added @FaizanRabbani https://github.com/akhiljain1611/TFS/blob/master/README.md — Akhil Jain, Feb 18 '18 at 16:37
You need to initialize `PBacklog`, can you share `workItemList` class as well? — FaizanHussainRabbani, Feb 18 '18 at 16:44
added https://github.com/akhiljain1611/TFS/blob/master/README.md — Akhil Jain, Feb 18 '18 at 16:47
in `workItemList` you will have to initialize `PBacklog` like following: `List PBacklog = new List;` — FaizanHussainRabbani, Feb 18 '18 at 17:01

score 3 · Accepted Answer · answered Feb 18 '18 at 17:12

You need to initialize the lists (Issues, Tasks and PBacklog) before you can begin adding items to it. I have done it using a constructor:

public class WorkItemViewModel
{
    public int Id { get; set; }
    public string Title { get; set; }
    public string AssignedTo { get; set; }
    public string WorkitemType { get; set; }
    public string Priorty { get; set; }
    public string IterationPath { get; set; }
    public string State { get; set; }
    public List<TFSIssue> Issues { get; set; }
    public List<TFSTask> Tasks { get; set; }
    public List<Backlogitem> PBacklog { get; set;}

    public WorkItemViewModel()  // Added a public constructor
    {
        Issues = new List<TFSIssue>();
        Tasks = new List<TFSTask>();
        PBacklog =  new List<Backlogitem>();
    }
}

Getting Object reference not set to an instance of an object C#?

1 Answers1