Passing viewmodel to actionresult creates new viewmodel
- by Jonas Bohez
I am using a viewmodel, which i then when to send to an actionresult to use
(the modified viewmodel)
But in the controller, i lose the list and objects in my viewmodel. This is my view:
@using PigeonFancier.Models
@model PigeonFancier.Models.InschrijvingModel
@using (Html.BeginForm("UpdateInschrijvingen","Melker",Model))
{
<div>
<fieldset>
<table>
@foreach (var item in Model.inschrijvingLijst)
{
<tr>
<td>@Html.DisplayFor(model => item.Duif.Naam)</td>
<td> @Html.CheckBoxFor(model => item.isGeselecteerd)</td>
</tr>
}
</table>
<input type="submit" value="Wijzigen"/>
</fieldset>
</div>
}
This is my controller, which does nothing at the moment until i can get the full viewmodel back from the view.
public ActionResult UpdateInschrijvingen(InschrijvingModel inschrijvingsModel)
{
// inschrijvingsModel is not null, but it creates a new model before
it comes here with
//Use the model for some updates
return RedirectToAction("Inschrijven", new { vluchtId =
inschrijvingsModel.vlucht.VluchtId });
}
This is the model with the List and some other objects who become null because it creates a new model when it comes back from the view to the actionresult
public class InschrijvingModel
{
public Vlucht vlucht;
public Duivenmelker duivenmelker;
public List<CheckBoxModel> inschrijvingLijst { get; set; }
public InschrijvingModel()
{
// Without this i get, No parameterless constructor defined exception.
// So it uses this when it comes back from the view to make a new model
}
public InschrijvingModel(Duivenmelker m, Vlucht vl)
{
inschrijvingLijst = new List<CheckBoxModel>();
vlucht = vl;
duivenmelker = m;
foreach (var i in m.Duiven)
{
inschrijvingLijst.Add(new CheckBoxModel(){Duif = i,
isGeselecteerd = i.IsIngeschrevenOpVlucht(vl)});
}
}
What is going wrong and how should i fix this problem please?
Thanks
