CODEWITHSUNDEEP
c#asp.netentity-frameworkviewmodelienumerable
btag
btag

Reputation: 27

'IEnumerable<>' does not contain a definition for '' and no extension method ''

I'm trying to list all my Users, but I'm getting the following error:

'IEnumerable<>' does not contain a definition for 'UsersVm' and no extension method 'UserVm' accepting a first argument of type 'IEnumerable' could be found

My Code is as follow:

Model:

public class UserEntity
    {
        public virtual int Id { get; set; }
        public virtual string Username { get; set; }
        public virtual string Email { get; set; }
        public virtual string PasswordHash { get; set; }
    }

ViewModel:

public class UsersIndex
    {
        public IEnumerable<UserEntity> UsersVm { get; set; }
    }

View (I get the error here at '.UsersVm')

@model IEnumerable<MyBlog.Areas.Admin.ViewModels.UsersIndex>

<h1>Admin Users</h1>

<ul>
    @foreach (var user in Model.UsersVm)
    {
        <li>@user.Username</li>
    }
</ul>

Controller:

public class UsersController : Controller
    {
        MyBlogEntities db = new MyBlogEntities();

        // GET: Admin/Users
        public ActionResult Index()
        {
            var users = db.Users.ToList();
            return View(users);
        }
    }

MyBlogEntities (DbContext)

public class MyBlogEntities : DbContext
    {
        public DbSet<UserEntity> Users { get; set; }
    }

Upvotes: 0

Views: 2608

Answers (4)

Peter B
Peter B

Reputation: 24270

Class UsersIndex is not needed, and then the View becomes this:

@model IEnumerable<MyBlog.Areas.Admin.ViewModels.UserEntity>

<h1>Admin Users</h1>

<ul>
    @foreach (var user in Model)
    {
        <li>@user.Username</li>
    }
</ul>

Upvotes: 1

James Gardner
James Gardner

Reputation: 506

Your view model contains an IEnumerable. The Model used in your view is an IEnumerable of view models. So essentially you have collections nested within a collection. I assume that you only want a single collection? In which case you either do not need the view model at all, or you should change the model used in your view to @model MyBlog.Areas.Admin.ViewModels.UserEntity.

If the collections nested within a collection is on purpose, then I would suggest that you place everything inside the view model and still have @model MyBlog.Areas.Admin.ViewModels.UserEntity in your view.

Upvotes: 0

devio
devio

Reputation: 37215

You declare a class UsersIndex but you do not seem to use it. The controller needs to instantiate and pass a UsersIndex value to the view, and the view's @model needs to accept a UsersIndex rather than an IEnumerable<UsersIndex>

Upvotes: 0

James Dev
James Dev

Reputation: 3009

<ul>
    @foreach (var user in Model)
    {
        @foreach (var userVm in user.UsersVm)
        {
            <li>@userVm.Username</li>
        }
    }
</ul>

Upvotes: 2

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