Can't get the binding object in a Form - asp.net-mvc-4

Question

In a ASP.NET MVC 4 project, I create a Model Class named Task with its CRUD and in the index page wich list the tasks I need to modify each line separatly. So I create a form in each line. But when I submit a line I don't get the object Task in the action in the controller.
Here is the code :
Thanks
Controller
public ActionResult Index()
{
ViewBag.projectVersionList = this.getProjectVersionList();
ViewBag.taskTypeList = this.getTaskTypeList();
ViewBag.durationList = this.getDurationList();
return View(db.Tasks.ToList());
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Index(Task task)//task est instancié mais les propriétées sont vides
{
task.User = db.UserProfiles.Find(WebSecurity.CurrentUserId);
if (ModelState.IsValid)
{
db.Entry(task).State = EntityState.Modified;
db.SaveChanges();
}
return View(task);
}
View
#model IEnumerable<TimeSheet.Models.Task>
#{
ViewBag.Title = "Index";
}
<h2>Index</h2>
<p>
#Html.ActionLink("Create New", "Create")
</p>
<div class="responsive-table-line">
<table class="table table-striped" data-card-view="true">
<thead>
<tr>
<th>
#Html.DisplayNameFor(model => model.Date)
</th>
<th>
#Html.DisplayNameFor(model => model.UserId)
</th>
<th>
#Html.DisplayNameFor(model => model.ProjectVersionId)
</th>
<th>
#Html.DisplayNameFor(model => model.TaskTypeId)
</th>
<th>
#Html.DisplayNameFor(model => model.Duration)
</th>
<th>
#Html.DisplayNameFor(model => model.Accomplished)
</th>
<th></th>
</tr>
</thead>
<tbody>
#foreach (var item in Model)
{
#Html.EditorFor(m => item)
}
</tbody>
</table>
</div>
Editor Template :
#model TimeSheet.Models.Task
#using (Ajax.BeginForm(new AjaxOptions
{
HttpMethod = "POST"
}))
{
#Html.AntiForgeryToken()
<tr>
<td data-title="#Html.DisplayNameFor(model => model.Date)">
#Html.HiddenFor(m => m.TaskId)
<div class="form-group">
#Html.TextBoxFor(m => m.Date, new { #class = "datefield form-control", type = "date" })
</div>
</td>
<td data-title="#Html.DisplayNameFor(model => model.UserId)">
#Html.DisplayFor(m => m.User.UserName)
</td>
<td data-title="#Html.DisplayNameFor(model => model.ProjectVersionId)">
<div class="form-group">
#Html.DropDownListFor(m => m.ProjectVersionId, (IEnumerable<SelectListItem>)ViewBag.projectVersionList, new { #class = "form-control" })
</div>
</td>
<td data-title="#Html.DisplayNameFor(model => model.TaskTypeId)">
<div class="form-group">
#Html.DropDownListFor(m => m.TaskTypeId, (IEnumerable<SelectListItem>)ViewBag.taskTypeList, new { #class = "form-control" })
</div>
</td>
<td data-title="#Html.DisplayNameFor(model => model.Duration)">
<div class="form-group">
#Html.DropDownListFor(m => m.Duration, (IEnumerable<SelectListItem>)ViewBag.durationList, new { #class = "form-control" })
#Html.ValidationMessageFor(m => m.Duration)
</div>
</td>
<td data-title="#Html.DisplayNameFor(model => model.Accomplished)">
#Html.CheckBoxFor(m => m.Accomplished)
</td>
<td data-title="">
<button type="submit" class="btn btn-default glyphicon glyphicon-floppy-disk" aria-label="Left Align"></button>
#Html.ActionLink(" ", "Edit", new { id = Model.TaskId }, new { #class = "btn btn-default glyphicon glyphicon-edit" })
<button type="button" class="btn btn-default" aria-label="Left Align">
<span class="glyphicon glyphicon-align-left" aria-hidden="true"> #Html.ActionLink(" ", "Details", new { id = Model.TaskId })</span>
</button>
<button type="button" class="btn btn-default" aria-label="Left Align">
<span class="glyphicon glyphicon-trash" aria-hidden="true"> #Html.ActionLink(" ", "Delete", new { id = Model.TaskId })</span>
</button>
</td>
</tr>
}

Answer 1

Thanks ! I've found the pb : The fields in each forms are names "items.[propertyName]" instead of "[propertyName]".I replace in the view item by model like this
#foreach (var model in Model)
{
#Html.EditorFor(m => model)
}
And in EditorTemplace m by model
model => model.Accomplished
Thanks!