How to initialize a model with multidimensional arrays in ASP.Net MVC?

Question

Initializing the model with multiple arrays.

I have already tried to initialize but its not working.

namespace ArrayTest.Models
{
    public class Question
    {
        public string question { get; set; }
        public string[] option { get; set; }
        public string[] score { get; set; }
    }
}

public class DefaultController : Controller
{

    public ActionResult Index()
    {
        IEnumerable<Question> x = new List<Question>
        {
            new Question(){ question = "Question1", option = { "abc","cde","efg"}, score = { "abc", "cde", "efg" } },
            new Question(){},
            new Question(){},
            new Question(){}
        };
        return View(x);
    }
}

I expect this model to be initialized and sent to the view.

you can change your code to be something like new Question(){question="Question1", option= new string[3] { "abc","cde","efg"},score=new string[3]{ "abc", "cde", "efg" } as you are trying to initialize an array. So, in C# your have to define the type along with the size. — vikscool
– vikscool, Commented Jun 11, 2019 at 5:59
Please try like this option will be better rather then your code public List<Options> options { get;set;} — Gurdeep Singh
– Gurdeep Singh, Commented Jun 11, 2019 at 6:28
@GurdeepSingh Why? and how come List<T> would be better? You are tight coupling then rather IEnumerable<T> would be better suggestion — Rahul
– Rahul, Commented Jun 11, 2019 at 6:31

EscanorEU · Accepted Answer · 2019-06-11 06:39:50Z

2

string[] doesn't have an .Add() method, so option = { "abc", "cde", "efg"} won't work. You need to create the array and initialize the array:

var list = new List<Question>
{
    new Question()
    {
        question = "Question1",
        option = new string[] { "abc", "cde", "efg"},
        score = new string[] { "abc", "cde", "efg" }
    },

    new Question(){},
    new Question(){},
    new Question(){}
};

edited Jun 11, 2019 at 6:39

answered Jun 11, 2019 at 6:28

EscanorEU

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1 Comment

Rahul Over a year ago

Or just option = new [] { "abc", "cde", "efg"},

Croos Nilukshan · Accepted Answer · 2019-06-11 06:31:58Z

Step 1 : Add a constructor in your modal like following,

 public class Question
    {
        public string question { get; set; }
        public string[] option { get; set; }
        public string[] score { get; set; }

        public Question(string question, List<string> option, List<string> score)
        {
            this.question = question;
            this.option = option.ToArray();
            this.score = score.ToArray();

        }
    }

Step 2: Modify your controller method like following,

 IEnumerable<Question> x = new List<Question> {
                new Question("Question1", new List<string>{"cde","efg"}, new List<string> { "abc", "cde", "efg" }),
                new Question("Question2", new List<string>{"cde","efg"}, new List<string> { "abc", "cde", "efg" }) } ;

If you use this List, You can use .Add() method as well.

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