Can someone please have a look at my code and help me understand why I'm getting this error? I have set up a controller and model, but when trying to run this view I get this error.

System.NullReferenceException: 'Object reference not set to an instance of an object.' when trying to run new View.

Accepted answer

Lan Huang-MSFT 25,231 Microsoft Vendor

System.Web.Mvc.WebViewPage<TModel>.Model.get returned null

The error is because you haven't defined Model in your View.
You need to fill your model and send it to the View.
Try the following:
.cshtml

@model MVCname.Models.Your Model

Controller

public ActionResult Index()  
{  
    using (MvcDB dataBase = new MvcDB())  
    {  
  
    }  
    return View(< YourModel > );  
}

If possible, you can provide code that reproduces the problem so we can better help you troubleshoot.

Best regards,
Lan Huang

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Mel 21

Thanks for your prompt answer Lan! I did try inputting Client in the return View(); but I got this message: Client is a type which is not valid given the context.

I have set up ia Client model, ClientController and Client.cshtml view. I followed a YouTube tutorial so I'm just so stuck!

Here is the controller code:
using BasicMVCProject.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace BasicMVCProject.Controllers  
{  
    public class ClientController : Controller  
    {   
        // GET: Client  
        public ActionResult Index()  
        {  
          
            List<Client> clientList = new List<Client>();  
  
            clientList.Add(new Client { FirstName = "John", LastName = "Williams", Phone = 0421762441, Email = "john@yahoo.com" });  
            clientList.Add(new Client { FirstName = "John", LastName = "Williams", Phone = 0421762441, Email = "john@yahoo.com" });  
            clientList.Add(new Client { FirstName = "John", LastName = "Williams", Phone = 0421762441, Email = "john@yahoo.com" });  
            clientList.Add(new Client { FirstName = "John", LastName = "Williams", Phone = 0421762441, Email = "john@yahoo.com" });  
  
        return View();  
        }  
    }  
}

Here is the view:

...continued

Lan Huang-MSFT 25,231 Reputation points Microsoft Vendor

2022-09-26T01:59:26.327+00:00
Hi @Mel ,
According to your code, what you need to return is clientList.

return View(clientList);

Best regards,
Lan Huang
Mel 21 Reputation points

2022-09-26T02:10:21.067+00:00

That worked! Thank you so much for your help :)

Jinesh Prajapati 0

its not working.

@model IEnumerable<Crude1.Models.Employee>


<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <p>
        @Html.ActionLink("Create New", "Create")
    </p>
    <table class="table">
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Name)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Email)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Dob)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Gender)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Contact)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.City)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Address)
            </th>
            <th></th>
        </tr>
    
    @foreach (var item in Model) {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.Name)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Email)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Dob)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Gender)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Contact)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.City)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Address)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { id=item.Id }) |
                @Html.ActionLink("Details", "Details", new { id=item.Id }) |
                @Html.ActionLink("Delete", "Delete", new { id=item.Id })
            </td>
        </tr>
    }
    
    </table>
</body>
</html>

---Model---

namespace Crude1.Models
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;

    public partial class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public DateTime Dob { get; set; }
        public string Gender { get; set; }
        public string Contact { get; set; }
        public string City { get; set; }
        public string Address { get; set; }
    }
}

---Controoller---

using Crude1.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace Crude1.Controllers
{
    public class HomeController : Controller
    {
        // GET: Home
        [HttpGet]
        public ActionResult Index()
        {
            //using (CrudEntities dataBase = new CrudEntities())
            //{
            //}
            return View();
        }
        public ActionResult Create()
        {
            return View();
        }
        
    }
}

Capture

System.NullReferenceException: 'Object reference not set to an instance of an object.' when trying to run new View.

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