Null value in Model Class property in MVC 3

Question

I have a question. I need to save all values of my model. Class

public class AssessmentAreaContent
{
  //SysAssessmentSubAreaCategory is enity model class
  public List<SysAssessmentSubAreaCategory> ListSysAssessmentSubAreaCategory;   
}

Controller

public ActionResult AssessmentArea(int id)
            { 
              var model = new AssessmentAreaContent();
                model.ListSysAssessmentSubAreaCategory = db.SysAssessmentSubAreaCategory.Where(c => c.AssessmentAreaId == id).ToList();
                return View(model);
            }

Controller Http Post Method

 [HttpPost]
        public ActionResult AssessmentArea(Web.Models.AssessmentAreaContent assessmentAreaContent)
        {

            //assessmentAreaContent.ListSysAssessmentSubAreaCategory is null here ?? ; 
            return RedirectToAction("AssessmentArea", "AssessmentArea");
        }

View

@model Web.Models.AssessmentAreaContent

@{
    ViewBag.Title = "Area";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
@using (Html.BeginForm())
{
    @{ 

    if (Model != null)
                        {
       foreach (var category in Model.ListSysAssessmentSubAreaCategory)
                            {           


              <strong>@Html.EditorFor(item => category.AreaCategoryName)</strong>  
                <br />
       }
}
}
<input type="submit" name="button" class="btn" value="Save" />
}

I m getting Null value in assessmentAreaContent.ListSysAssessmentSubAreaCategory; Im using Entity Framework with MVC 3 How can I do that please ?

Thanks

Monu ur model is a plain object not an enumeration how do u manage to iterate over it? — Muhammad Adeel Zahid
– Muhammad Adeel Zahid, Commented Jan 7, 2012 at 7:57

Muhammad Adeel Zahid · Accepted Answer · 2012-01-07 08:26:39Z

1

make an editor template with the name SysAssessmentSubAreaCategory. note that name of template is same as type of your list objects. in this template write something like

@model Web.Models.SysAssessmentSubAreaCategory
<strong>@Html.EditorFor(item => category.AreaCategoryName)</strong>  
                <br />

in your main view just make these changes

if (Model != null)
                        {
       Html.EditorFor(x=>x.ListSysAssessmentSubAreaCategory)
       }

leave the rest unchanged. fill out the form and post it and you will have values in the controller.

answered Jan 7, 2012 at 8:26

Muhammad Adeel Zahid

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1 Comment

Muhammad Adeel Zahid Over a year ago

Monu u r welcome. analyze the generated html and read this article haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx and you would know why this time list bound automatically

Jahan Zinedine · Accepted Answer · 2012-01-07 07:55:18Z

0

There is no input holding values for ListSysAssessmentSubAreaCategory so that in post back you have that property filled.

You need that values to be saved server side (e.g. in session ) or be represented in input form.

answered Jan 7, 2012 at 7:55

Jahan Zinedine

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