if an object does not have the value - do not display

Question

I try to do something like that. When my employee does not have a particular value that it is not displayed. I tried to do it like this:

    @foreach (var item in Model)
    {
        if (!item.Przewodnik.Uprawnienia.IsNullOrWhiteSpace()) { 
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Przewodnik.Pracownik.Osoba.Imie)
                </td> 
                    (...)

But it give me a .NullReferenceException.

if(item.Przewodnik.Uprawnienia != null){...}

I tried this as well, but also give error.

those who down vote should leave a comment explaining why so the question poster can improve whatever the down vote is meant to point out. Constructive feedback will help build somebody up which I believe is what SO strives for! — Leo Nix, Jun 22 '15 at 12:30

score 2 · Accepted Answer · answered Jun 22 '15 at 12:18

2

Try the following:

@foreach (var item in Model)
    {
        if (item != null && item.Przewodnik != null && !string.IsNullOrEmpty(item.Przewodnik.Uprawnienia)) { 
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Przewodnik.Pracownik.Osoba.Imie)
                </td> 
                    (...)

answered Jun 22 '15 at 12:18

Ala

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works perfectly, thanks a lot! – TjDillashaw Jun 22 '15 at 12:23
1

While Ala's solution works, you should also look for the root cause of null ref which may point you to issues upstream that feeds data to your UI. – Leo Nix Jun 22 '15 at 12:35
certainly I do, thanks – TjDillashaw Jun 22 '15 at 12:39

if an object does not have the value - do not display

1 Answers1