Class sent to Post Action is null

Question

I'm working on a view that presents all the records of class (Machine) where some of their properties could be updated.

For this, the view is working with an IEnumerable. These are the Get and Post methods:

Get Method: 

public async Task<IActionResult> Test()
    {

        PopulateMachineTypeDropDownListStore();
        return View(await _context.Machines.AsNoTracking().ToListAsync());
    }

Post Method: 

[HttpPost, ActionName("Test")]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> TestPost(int id, [Bind("Id,StoreID,PUnit,Status")] Machine machine)
    {
        if (id != machine.Id)
        {
            return NotFound();
        }
        if (ModelState.IsValid)
        {
            try
            {
                _context.Update(machine);
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!MachineExists(machine.Id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }
            return RedirectToAction("Index");
        }
        return View(machine);}

The problem is that the class sent to the Post Action is null (almost all their fields are zero or null except for the Id)

 

My intention is to update only a few properties of the register thru this view, but for some reason the information from the form is not getting to the Post Method.

 

Can anyone tell me what is wrong here?

 

Thanks in advance! 

 

This is the view:

 

@model IEnumerable<Application.Models.Machine>
@{
    ViewData["Title"] = "Test";

}
@foreach (var item in Model)
{
    <form asp-action="Test" asp-route-id="@item.Id" method="post">
        <table class="table">
            <tbody>
            <tr>
                <td>
                    <input type="hidden" asp-for="@item.Id" />
                    <div class="form-group">
                        <div class="col-md-10">
                            <input asp-for="@item.MchName" readonly class="form-control" />
                            <span asp-validation-for="@item.MchName" class="text-danger"></span>
                        </div>
                    </div>
                </td>
                <td>
                    <div class="form-group">
                        <div class="col-md-10">
                            <select asp-for="@item.StoreID" class="form-control" asp-items="ViewBag.StoreID">
                            </select>
                            <span asp-validation-for="@item.StoreID" class="text-danger"></span>
                        </div>
                    </div>
                </td>
                <td>
                    <div class="form-group">
                        <div class="col-md-10">
                            <input type="number" max="10" step=".1" asp-for="@item.PUnit" class="form-control" />
                            <span asp-validation-for="@item.PUnit" class="text-danger"></span>
                        </div>
                    </div>
                </td>
                <td>
                    <div class="form-group">
                        <div class="col-md-10">
                            <select name="Status" asp-for="@item.Status" class="form-control">
                                <option value="0">Operativo</option>
                                <option value="1">Nuevo Item</option>
                                <option value="2">Reparación</option>
                            </select>
                            <span asp-validation-for="@item.Status" class="text-danger"></span>
                        </div>
                    </div>
                </td>
                <td>
                    <input id="submit-data" type="submit" value="Update" class="btn btn-default" />
                </td>
            </tr>
        </tbody>
    </table>

</form>}

Answer 1

Is solved your issue? If not, Your creating form controls that have no relationship to your model (look at the html your generating - they are prefixed with item). But your view make no sense. You can only submit one form so why are you generating multiple forms and all the extra html associated with it.

Answer 2

Hey Luis,

 

Can you use the dev tools in Firefox, Chrome etc (likely the Network tab) and show us the details of the form post you are doing?  

 

Not entirely sure but I think for submit look for name attribute of controls. Try changing asp-for to name for a minute and test. 

 

Or use @html.beginform() and test it up again.