Null reference when using model value in the view

Question

I am declaring my values in web.config

 <appSettings>
    <add key="SystemName" value="RealState Premium" />
    <add key="SystemDescription" value="Sistema de Administração Imobiliário" />
  </appSettings>

Configured a model:

    public class _Header
    {
        public string SystemName { get; set; }
        public string SystemDescription { get; set; }
    }

Controller:

    [AllowAnonymous]
    public ActionResult _Header()
    {
        HomeModels._Header headerModel = new HomeModels._Header();

        headerModel.SystemName = ConfigurationManager.AppSettings["SystemName"];
        headerModel.SystemDescription = ConfigurationManager.AppSettings["SystemDescription"];

        return PartialView(headerModel);
    }

and for the last, View:

@using realstate.Models
@model HomeModels._Header

<div class="logo">
    <img src="~/Images/logo/logo.png" alt="Mercado de Imóveis" />
    <table class="sysTitleTbl">
        <tr>
            <td class="name">@Model.SystemName</td>
        </tr>
        <tr>
            <td class="description">@Model.SystemDescription</td>
        </tr>
    </table>
</div>

The problem is that I am getting a null reference in @Model.SystemName What would be the problem?

What is the location of the Web.Config you placed the appSettings into relative to the root of your project? They must be placed into the web.config at the root; if you placed them into a config inside a Views folder, they will be irrelevant. — Moby's Stunt Double, May 23 '13 at 21:15
Welcome to Stack Overflow! Almost all cases of `NullReferenceException` are the same. Please see "[What is a NullReferenceException in .NET?](http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-in-net)" for some hints. — John Saunders, May 24 '13 at 06:30

score 1 · Accepted Answer · answered May 24 '13 at 06:24

1

Set break point to these line of code

headerModel.SystemName = ConfigurationManager.AppSettings["SystemName"];
headerModel.SystemDescription = ConfigurationManager.AppSettings["SystemDescription"];

to see what' s happening with it

answered May 24 '13 at 06:24

thangchung

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Thanks, I found that there were a error on the sequence of the calls. – Guilherme T.I. May 24 '13 at 13:45

score 0 · Answer 2 · answered May 23 '13 at 21:29

Make sure that you are setting the appSettings node in the "/web.config" file and not the "views/web.config" file. Also, make sure that it sits within "configuration".

Example:

<configuration>
    <appSettings>
        <add key="SystemName" value="RealState Premium" />
        <add key="SystemDescription" value="Sistema de Administração Imobiliário" />
    </appSettings>
</configuration>

Null reference when using model value in the view

2 Answers2