CODEWITHSUNDEEP
c#entity-frameworkmodel-view-controllerviewmodel
Aqib Mehrban
Aqib Mehrban

Reputation: 71

Can't access data from ViewModel?

I have view model which contains two tables however if I am updating my entity framework e.g.

View Model:

public class MyViewModel
{
public IEnumerable<Telephone_Search.Models.tbl_pics> images;
public IEnumerable<Telephone_Search.Models.tbl_users> users;
}

Controller : 

[HttpPost]
    public ActionResult Index(tbl_pics pic, HttpPostedFileBase file)
    {
        if (ModelState.IsValid)
        {
            if (file != null)
            {
                file.SaveAs(HttpContext.Server.MapPath("~/Images/")
                                                      + file.FileName);
                byte[] data = new byte[] { };
                using (var binaryReader = new BinaryReader(file.InputStream))
                {
                    data = binaryReader.ReadBytes(file.ContentLength);
                }
               pic.picture = file.FileName;
               pic.user_no = 20173;
               db.tbl_pics.Add(pic);
               db.SaveChanges();
            }
            return RedirectToAction("Index");
        }

        return View(pic);
    }

and then use a view model within my razor view e.g. @model ViewModel and try to loop through the users by :

@foreach (var img in Model.images) {
<img src="~/images/@pic.picture" width="100" height="100" />
}

The values are returned as null?

Thank you

Upvotes: 0

Views: 198

Answers (1)

user1666620
user1666620

Reputation: 4808

You viewmodel consists of two collections, images and users.

public class MyViewModel
{
    public IEnumerable<Telephone_Search.Models.tbl_pics> images;
    public IEnumerable<Telephone_Search.Models.tbl_users> users;
}

However, in your controller method you are only returning the collection images. users remains null. 

[HttpPost]
public ActionResult Index(tbl_pics pic, HttpPostedFileBase file)
{
    ....
    return View(pic); // you are only returning the images here, not the users, or the viewmodel.
}

You need to populate the users collection in your controller method.

Secondly, this

@foreach (var img in Model.Users) {
    <img src="~/images/@pic.picture" width="100" height="100" />
}

does not make sense. Where is @pic defined here?

Upvotes: 2

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