Wsrtjtyk

I'm working on an Asp MVC application that contains a grid of data that I can filter with a checkboxlist.I'm using PagedList to display the data. My filter works well on the first page, but if I click on the 2nd page, the filter is cancelled. I don't have this problem with filter using dropdownlist(it's not in the following example).

My view looks like this:

<div class="wrapper">

<nav id="sidebar">

    @using (Html.BeginForm("Index", "Missions", FormMethod.Get))

    {

        @Html.EditorFor(x => x.Decision)

    }

</nav>

<div id="content" class="container">

    <table class="table table-bordered">

        <tr>

            <th class="col-md-2">

                Decision

            </th>



        </tr>

        @foreach (var item in Model.OnePageOfMissions)

        {

        <tr>

            <td class="col-md-1">

                @Html.DisplayFor(modelItem => item.decision)

            </td>

        </tr>

        }

        @Html.PagedListPager((IPagedList)Model.OnePageOfMissions, page => Url.Action("Index", new { page, Decision = Model.Decision}))

    </table>

</div>

I created a template to display checkboxlist like this:

<div class="form-check row">

@Html.HiddenFor(x => x.ID)

@Html.CheckBoxFor(x => x.IsChecked, htmlAttributes: new { onchange = "form.submit();", @class = "form-check-input col-md-2" })

@Html.LabelFor(x => x.Display, Model.Display, htmlAttributes: new { @class = "form-check-label col-md-8" })

My controller looks like this:

 public ActionResult Index(int? page, List<CheckBoxListItem> Decision)

    {

        IndexViewModel model = new IndexViewModel();

        //Display Missions

        model.missionsList = db.missions_supportmission.ToList();

        //Retrieve parameters    

        model.Decision = Decision;

        //PagedList

        var pageNumber = page ?? 1; // if no page was specified in the querystring, default to the first page (1)

        var onePageOfMissions = model.missionsList.ToPagedList(pageNumber, 10); // will only contain 10 products max because of the pageSize(equel to 10)

        model.OnePageOfMissions = onePageOfMissions;

         //Filter

        if (model.Decision != null)

        {

            var selecteddecision = model.Decision.Where(x => x.IsChecked).Select(x => x.ID);

            model.OnePageOfMissions = (from m in db.missions_supportmission

                                       join l in db.list_decision

                                       on m.decision equals l.decision_id

                                       where selecteddecision.Contains(l.decision_id)

                                       select m)

                                      .OrderBy(a => a.id)

                                      .ToPagedList(pageNumber, 10);

        }

            }

        }

        //Display CheckBox

        //Checkboxlist (!important => mettre ce bloc de code après la requête link qui permet de filtrer sur les checkbox)

        var allDecisions = db.list_decision.ToList();//returns List<list_decision>

        var checkBoxListItems = new List<CheckBoxListItem>(); //nouvelle instance de la classe checkboxlist

        model.Decision = checkBoxListItems;

        foreach (var decison in allDecisions)

        {//On assigne les valeurs "id", "display" et "is checked" à la variable checkboxlistitem

            checkBoxListItems.Add(new CheckBoxListItem()

            {

                ID = decison.decision_id,

                Display = decison.name_en,

                IsChecked = false //On the add view, no decision are selected by default

            });

        }



        return View(model);

    }

I have also a ViewModel:

namespace MissionsDF.Models

{

public class IndexViewModel

{



    public IEnumerable<missions_supportmission> missionsList { get; set; }

    public List<CheckBoxListItem> Decision { get; set; }

    public IndexViewModel()

    {

        this.Decision = new List<CheckBoxListItem>();

    }

    public IPagedList<missions_supportmission> OnePageOfMissions { get; set; }



  }

}