CODEWITHSUNDEEP
asp.netasp.net-mvcrazor
syed mohsin
syed mohsin

Reputation: 2938

IEnumerable View returning null on HttpPost

I have a Form which is filled with some grid like structure with CheckBoxes and DisplayField. I want to fetch rows with Checked CheckBoxes. Problem is i am getting null in Controller's post method.
Models 

public class RegisterModuleSelection 
{
    [Display(Name = "ID")]
    public int mID { get; set; }

    [Display(Name = "Module")]
    public string Module { get; set; }

    [Display(Name = "Buy")]
    public bool Buy { get; set; }        
}

View

@model IEnumerable<MAK_ERP.Models.RegisterModuleSelection>
@{
ViewBag.Title = "Register - Modules Selection";}
<h2>
Register - Modules Selection</h2>
@using (Html.BeginForm("RegisterModules", "UserAccount", FormMethod.Post, new { id = "RegisterModules", @class = "generalForm" }))
{
<table class="Grid Module">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Module)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Price)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Duration) (Months)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Buy)
        </th>
    </tr>
    @foreach (var item in Model)
    {
        <tr>
            <td>
                @Html.HiddenFor(modelItem => item.mID)
                @Html.DisplayFor(modelItem => item.Module)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Price)
            </td>
            <td>
                @Html.EditorFor(modelItem => item.Duration)
            </td>
            <td>
                @Html.CheckBoxFor(modelItem => item.Buy)
            </td>
        </tr>
    }
    <tr>
        <td colspan="4">
            <input type="submit" value="Next" class="button3" />
            <input type="reset" value="Reset" class="button4" />
        </td>
    </tr>
</table>
}

Controller

   [HttpGet]
    public ActionResult RegisterModules()
    {
        IEnumerable<MAK_ERP.Models.RegisterModuleSelection> model = reg.getModules();
        return View(model);
    }
    [HttpPost]
    public ActionResult RegisterModules(IEnumerable<Models.RegisterModuleSelection> regMod)
    {
    //regMod is null here
    ...

Upvotes: 0

Views: 1618

Answers (2)

Abbas Amiri
Abbas Amiri

Reputation: 3204

You should use EditorTemplates to solve the problem.

The accepted answer at ASP.NET MVC Multiple Checkboxes would help you.

Upvotes: 0

afzalulh
afzalulh

Reputation: 7943

Unfortunately you cannot bind in this way. Model binding depends upon how generated html looks like. In this particular case it should look something like:

<input id="item_Buy" type="checkbox" value="true" name="item[0].Buy" checked="checked">

If you are okay with some workarounds, you can use a for loop instead of foreach loop where you can add an index to each control name and model binder could bind them properly.

There are some really helpful discussions available, you can check here: ASP.NET MVC - Insert or Update view with IEnumerable model. And also Model Binding To A List. Another one is: Modelbinding IEnumerable in ASP.NET MVC POST?

Upvotes: 2

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