MVC POST Won't Bind Model...Result is null

Question

I've read through many reported issues relating to this, none have resolved the problem I'm having.

Model:

public class MySoftwareResults
{
    public Shopping_MachineInformation MachineInformation { get; set; }
    public ShoppingUserInformation UserInformation { get; set; }
    public List<Shopping_MySoftwareResults> ApplicationsList { get; set; }
    public string Requester { get; set; }

    public MySoftwareResults()
    {
        MachineInformation = new Shopping_MachineInformation();
        UserInformation = new ShoppingUserInformation();
        ApplicationsList = new List<Shopping_MySoftwareResults>();
        Requester = "";
    }
}

Form:

@using (@Html.BeginForm("MySoftwareResults", "Client", FormMethod.Post))
    {
        <div class="form-group">
            <table class="table table-responsive list-view">
                <thead>
                <tr>
                    <th>Software</th>
                    <th>Cost</th>
                    <th>Requires Approval</th>
                    <th>Status</th>
                    <th>Select</th>
                </tr>
                </thead>
                <tbody>
                @foreach (var item in Model.ApplicationsList)
                {
                    <tr>
                        <td>
                            @Html.LabelForModel(item.Software)
                        </td>
                        <td>@Html.LabelForModel(item.Cost)</td>
                        <td>
                            @Html.LabelForModel(item.RequiresApproval)
                        </td>
                        <td>@Html.LabelForModel(item.Status)</td>
                        <td>
                            <input type="checkbox" id="Selected" name="Selected" value="@item.CollectionID"/>
                        </td>
                    </tr>
                }
                </tbody>
            </table>
        </div>
        <div class="form-group">
            <input type="submit" title="SUBMIT" class="btn btn-primary pull-right" id="butSubmit" />
        </div>
    }

The form populates perfectly. When I click on Submit the Model is empty:

[HttpPost]
public ActionResult MySoftwareResults(MySoftwareResults results)
{            
    var selected = axp.euc.sdsassistance.core.Queries.Shopping_ParseCheckedItems(Request.Form["Selected"]);...
}

I tried using Fiddler, but I can't find anything to reflect the model data being passes when the form loads.

I'm stumped.

Pretty sure you need to give your values the 'name' attribute before you can use them through Request.Form[]. Unsure if this works with the built-in Html.LabelForModel. — DGK, Feb 02 '17 at 17:08
Don't think that's it. Originally I was resolving an issue with checkboxes. I've gotten that figured out and the Request.Form[] contains that data. In that example I built to resolve the checkbox issue the Model binded to the post. But in my application it's not. — Edmound, Feb 02 '17 at 18:36
Your generating html which has no relationship to your model. The only input your generate has `name="Selected"` and that would only bind to `public ActionResult MySoftwareResults(bool[] selected)` which would be useless. Refer [this answer](http://stackoverflow.com/questions/30094047/html-table-to-ado-net-datatable/30094943#30094943) to understand how to bind to collections. And forms only send back the name/value pairs of successful controls (``, `` and `<select>`)</select> — , Feb 02 '17 at 21:51
Ah! Duh! I'm closer to getting this to bind. I've managed to get the ApplicationList to bind. How would I get the other sub-models to bind? I don't want to display the data, just want it to transfer over to the controller? I tried @Html.HiddenFor(x=>x.MachineInformation), but that didn't work. — Edmound, Feb 02 '17 at 22:56

score 0 · Answer 1 · answered Feb 02 '17 at 23:05

Thanks for Stephen Muecke for directing me to better understanding how the modeling works in forms. I was able to bind my data over to the POST call by doing the following.

For the models I wasn't displaying data for, but needed them to be bind to the POST I did:

<div style="display: none">
            @Html.EditorFor(x=>x.MachineInformation)
            @Html.EditorFor(x=>x.UserInformation)
        </div>

For the Model I wanted to display data for I did:

@for (int i = 0; i < Model.ApplicationsList.Count; i++)
                {
                    <tr>
                        <td>
                            @Html.LabelFor(m => m.ApplicationsList[i].Software, new {@class = "form-controller"})
                        </td>
                        <td>@Html.LabelFor(m => m.ApplicationsList[i].Cost, new {@class = "form-controller"})</td>
                        <td>
                            @Html.LabelFor(m => m.ApplicationsList[i].RequiresApproval, new {@class = "form-controller"})
                        </td>
                        <td>@Html.LabelFor(m => m.ApplicationsList[i].Status, new {@class = "form-controller"})</td>
                        <td>
                            <input type="checkbox" id="Selected" name="Selected" value="@Model.ApplicationsList[i].CollectionID"/>
                        </td>
                    </tr>
                }

When I clicked on Submit my Model populated in the controller!!

MVC POST Won't Bind Model...Result is null

1 Answers1