Select2，如何获取选定的值并添加新值

Question

好的，我使用的是Select2。我做＆＃34;创造方法＆＃34;使用select2，它的工作很棒，好吧，我该怎么做＆＃34;编辑方法＆＃34; ??在EditMethod中，我想在List中看到已选择的值并添加新的，如果我想要的话。 这里的代码对于createMethod，我真的很新，请帮忙！

   public ActionResult Edit(int id = 0)
    {
       NIRs nir = db.NIRs.Find(id);
        if (nir == null)
        {
            return HttpNotFound();
        }
        ViewBag.IFile = new MultiSelectList(db.IFile, "Id", "NazvanieFaila");
        return View(nir);
    }

    [HttpPost]
    public ActionResult Edit(NIRs nir, int[] selectedFiles)
    {

        NIRs newNIR = db.NIRs.Find(nir.Id);
        newNIR.Name = nir.Name;
        if (selectedFiles != null)
        {
            foreach (var FileId in selectedFiles)
            {
                IFile files = db.IFile.Find(FileId);
                nir.IFile.Add(files);
            }
        }
        else
        {
            nir.IFile.Clear();
        }

            db.Entry(newNIR).State = EntityState.Modified;
            db.SaveChanges();
            return RedirectToAction("NirList");
    }

和ViewCode：

    @using NIR.Models
@model NIR.Models.NIRs

<link href="~/Content/select2.css" rel="stylesheet" />
<script src="~/Scripts/select2.js"></script>

<div align="center">
    @using (Html.BeginForm())
    {
        @Html.ValidationSummary(true)

        <h2>Edit</h2>
        <legend>
            <div style="overflow-x: auto; width: auto;">
                <table align="center" class="TFtable">
                       <tr>
                        <td>
                            <div class="editor-label">
                                Name:
                            </div>
                        </td>
                        <td>
                            <div class="editor-field">
                                @Html.TextAreaFor(model => model.Name)
                            </div>
                        </td>
                    </tr>
                     <tr>
                        <td>
                            <div class="editor-label">
                                Files:
                            </div>
                        </td>
                        <td>
                            <div class="editor-field">
                                @Html.ListBox("IFile")
                            </div>
                        </td>
                    </tr>
                </table>
            </div>
        </legend>
        <p>
            <input type="submit" value="Save Changes" />
        </p>

    }

    @section Scripts {
        @Scripts.Render("~/bundles/jqueryval")
    }
</div>


<script type="text/javascript">

        $("#IFile").select2(
            {
                placeholder: "Choose files",
                width: 300
            });
    </script>