asp.net mvc cshtml foreach View nullerror.There is data but it appears not to exist.

Question

asp.net mvc chtml foreach View null error.There is data in foreach line but it appears not to exist.

@{
    ViewBag.Title = "personeller";
    Layout = "~/Views/Shared/_LayoutAdmin.cshtml";
}
<h2>Personeller</h2>
<br />
<link href="~/Content/bootstrap.min.css" rel="stylesheet"/>
<table cless="table table-bordered">
    <tr>
        <th>Personel Ad Soyad</th>
        <th>Kullanıcı Adı</th>
        <th>Tür</th>
        <th>Telefon</th>
        <th>Eposta Adresi</th>
    </tr>
    @foreach (var item in ViewBag.personeller)
    {
      
        <tr>
           
            <td>@item.personeladi</td>
            <td>@item.personelKullaniciadi</td>
            <td>@item.tur</td>
            <td>@item.personeltel</td>
            <td>@item.personeleposta</td>
        </tr>
    }

Answer 1

I suggest:

(1) Do not use an anonymous type to generate personeller as you did in the controller as follows:

(x, y) => new  // this will create anonymous type object. Don't do so.
          {
              personeladi=y.personelAdSoyad,
              personelKullaniciadi=y.personelKullaniciAd,
              tur = x.personelTuru,
              personeltel=y.personelTelno,
              personeleposta= y.personelEposta
          }

(2) Define custom class like below to transfer the data form controller to view:

public class DTO
{
    public string personeladi { get; set; }
    public string personelKullaniciadi { get; set; }
    public string tur { get; set; }
    public string personeltel { get; set; }
    public string personeleposta { get; set; }
}

(3) Modify the code of (1) above to use the above class (not anonymous type) as follows:

(x, y) => new DTO  // Create DTO object, not anonymous type object
          {
              personeladi=y.personelAdSoyad,
              personelKullaniciadi=y.personelKullaniciAd,
              tur = x.personelTuru,
              personeltel=y.personelTelno,
              personeleposta= y.personelEposta
          }

Answer 2

Answer 3

Hi @Serdar3535,

Can you provide the code for your controller?

You need to cast the list to its original type before using it.

For example:

@foreach (var item in ViewBag.personeller as List<WebApplication3.Models.Test> )

You can also change the data returned by the controller as follows:

 private TestContext db = new TestContext();
 public ActionResult Index()
 {
      List<Test> list = db.tests.ToList();
     //list.Add(new Test() { personeladi=1,personeleposta="a",personelKullaniciadi="a",personeltel="a",tur="a"});
     //list.Add(new Test() { personeladi = 2, personeleposta = "b", personelKullaniciadi = "b", personeltel = "b", tur = "b" });           
     ViewBag.personeller = list;
     return View();
 }

<table cless="table table-bordered">
    <tr>
        <th>Personel Ad Soyad</th>
        <th>Kullanıcı Adı</th>
        <th>Tür</th>
        <th>Telefon</th>
        <th>Eposta Adresi</th>
    </tr>
    @foreach (var item in ViewBag.personeller)
    {
        <tr>
            <td>@item.personeladi</td>
            <td>@item.personelKullaniciadi</td>
            <td>@item.tur</td>
            <td>@item.personeltel</td>
            <td>@item.personeleposta</td>
        </tr>
    }
</table>

Best regards,
Lan Huang

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Answer 4

Duplicate post.