How can i solve the @a.Message following problem?

Question

@foreach (var a in Model.MESSAGES.OrderBy(p => p.DATE))
{
    var id = a.SENDERID == ViewBag.KullaniciId ? a.SENTID : a.SENDERID;
    var name = Model.USERS.FirstOrDefault(p => p.ID == id)?.NAMESURNAME;
    <tr id="tr@(a.ID)">
        <td>@name</td>
        <td>@a.MESSAGE.Substring(0, Math.Min(100, a.MESSAGE.Length))</td>
    </tr>
}

I get the following error :

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

CoreFramework.Entities.Concrete.MEESAGES.Message.get returned null.

You need to check if there is any value in `@a.MESSAGE`. – Xinran Shen Oct 17 '22 at 08:09 — Xinran Shen, Oct 17 '22 at 08:09

Mohammad Aghazadeh · Accepted Answer · 2022-10-17T08:19:08.110

1

use null conditional operators

<td>@a.MESSAGE?.Substring(0, Math.Min(100, a.MESSAGE.Length))</td>

edited Oct 17 '22 at 08:19

answered Oct 17 '22 at 08:09

Mohammad Aghazadeh

2,108
3
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20

score 0 · Answer 2 · answered Oct 17 '22 at 08:08

0

try using null-conditional-operators

<td>@a.MESSAGE?.Substring(0, Math.Min(100, a.MESSAGE.Length))</td>

answered Oct 17 '22 at 08:08

Dean Van Greunen

5,060
2
14
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How can i solve the @a.Message following problem?

2 Answers2