Question 37958 in Ubuntu Question posted in
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Why .cshtml file don't see @model in .cshtml.cs file and i get Null References exception? – Ubuntu

I’ve created an ASP.NET Core 6 MVC project, and I want to see "Test" when i request it but I’m getting NullReferenceException. But when I create the Razor pages application and try the same thing on that project, I don’t get any errors.

I run app on Ubuntu 22.04, I use .NET Core 6.0 Framework.

namespace MyApp.Namespace
{
    public class TestModel : PageModel
    {
        public string? Message { get; set; }
        
        public void OnGet()
        {
            Message = "Test";
        }
    }
}

View:

@model MyApp.Namespace.TestModel

<dir>@Model.Message</dir>

Exception:

NullReferenceException: Object reference not set to an instance of an object.

AspNetCoreGeneratedDocument.Views_Home_Test.ExecuteAsync() in Test.cshtml

@Model.Message

I tried to change namespaces and add a @page directive in Razor page. Nothing has changed.

Tags:

2

Answers


  1. 0

    According to the code above you should make the following declaration in the Razor view file:

    @page
@using MyApp.Namespace
@model TestModel 

<dir>@Model.Message</dir>

    Detailed instructions on how to create a Razor Pages and @page, @model declarations you can find in the Microsoft documentation here: Razor Pages

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  2. 0

    MVC needs to pass model between View and controller. When you want to show values from backend, you need to return view with models.

    create a model to pass data:

     public class TestModel
    {
        public string? Message { get; set; }
    }

    set the default value in http get action:

    public IActionResult Index()
        {
            
            TestModel test = new TestModel();
            test.Message = "Test";

            //return view with model
            return View(test);
        }

    View

    @model TestModel

<h1>@Model.Message</h1>

    Now you can show Test in your view:

    enter image description here

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