Asp.Net MVC 3 - Persist a List through different Views

Question

i'm new at this tecnology and i'm having some trouble passing a list of an excel that i imported to my application, here's the code:

The problems is that the model in the Create Controller comes out null so i cant save into the database.

I can't save it before, in the uploadcomplete action because i intend to edit the values before save into the data base.

 [HttpPost]
  public ActionResult Index(HttpPostedFileBase excelFile)
    {
        if (excelFile != null)
        {
            //Save the uploaded file to the disc.
            string savedFileName = Server.MapPath("~/UploadedExcelDocuments/" +   excelFile.FileName);
            excelFileHandler.ImportExcel(savedFileName, excelFile); 
            return RedirecToAction("UploadComplete",excelFileHandler.DataToEdit);        
        }
        else { return RedirectToAction("Error", "Upload"); }
    }

    public ActionResult UploadComplete(List<Persona> DataToEdit) // This comes out null so i cant render the view now
    {
        return View();
    }

    [HttpPost]
    public ActionResult UploadComplete(IEnumerable<ExcelImport.Persona> model)
    {
        return View();
    }

    public ActionResult Create(IEnumerable<ExcelImport.Models.Person> model) 
    {
        using (ExcelimportDBTestEntities context = new ExcelimportDBTestEntities())
        {
            foreach (ExcelImport.Models.Person person in model)
            {
                Persona newPerson = new Person();
                newPersona.Id = person.Id;
                newPersona.Birthday= persona.Birthday;
                newPersona.LastName= persona.LastName;
                newPersona.Name = persona.Name;
                context.Persons.AddObject(newPersona);
                context.SaveChanges();
            }
            return View();
        }
    }

This is my View, there must be something wrong here

@model IEnumerable<ExcelImport.Models.Person>

@{
   ViewBag.Title = "UploadComplete";
}
<h2>UploadComplete</h2>
@Html.BeginForm(){
<table>
    <tr>
        <th>
            ID
        </th>
        <th>
            Name
        </th>
        <th>
            Last Name
        </th>
        <th>
            Birthday
        </th>
        <th>
            Options
        </th>
    </tr>
  @foreach (var item in Model) {   
    @Html.HiddenFor(model => item)
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Id)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Name)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.LastName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Birthday)
        </td>
        <td>

        </td>
    </tr>
    }

    </table>
   <input type="submit" value="Upload!"/>
  }

EDIT: i was tired yesterday so i put some... lets go whit "test" that i was doing by error, now this is what i really want to do. I got an Index View that upload the file and send to the post Index Controller, from there i want to send the list to my UploadComplete Controller, so i can render the UploadComplete View (the list comes out null), and in the post of that Action i want to send the model that i render in the UploadComplete View, to my create controller, so i can storage my data into the database. And as i said before i cant save it into the datebase in the index action becouse i intend to edit this data in the uploadcomplete view.

Thanks in advance, Regards.

I'm confused. How are you uploading anything, all your data is display only. Why do you even have a form? Is DataToEdit a collection of ExcelImport.Models.Person? You say this is a create form? But the title is UploadComplete? — Erik Funkenbusch, Sep 20 '12 at 21:31

score 0 · Accepted Answer · edited May 23 '17 at 12:21

0

As I can see in your code:

There is no [HttpPost] attribute
Form action is GET
Incorrect page rendering (hidden elemens)

Look at this example. It shows how lists could be binded on POST.

edited May 23 '17 at 12:21

Community

1
1

answered Sep 20 '12 at 21:26

webdeveloper

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@user1687202 `return RedirecToAction("UploadComplete",excelFileHandler.DataToEdit);` is just 302 redirect in browser, in situations like [this](http://stackoverflow.com/questions/2324044/net-mvc-calling-redirecttoaction-passing-a-model) it converted to hyperlink. Look at `TempData`. – webdeveloper Sep 21 '12 at 14:58
THANK YOU! that's what i was loking for. – devMd Sep 21 '12 at 15:22
got a question i got to pass the list in the index to the upload controller and render it, but how can i pass the lets say final list to the post upload controller, it comes out null (is the same code from the view) – devMd Sep 21 '12 at 15:40
@user1687202 simple `foreach` wont work in this situation, because it create wrong names. Create `DisplayTemplate` with hidden inputs and then binder will fill your model. The link I gave you shows how it could be done. – webdeveloper Sep 21 '12 at 16:01
when u say hidden fields its something like Html.HiddenFor(model => item.id)? If it is i really dont understand how can put together my model, remember that i dont have the data in DB. And i need the foreach to display my table so i can be able to display and edit that in the client side... – devMd Sep 21 '12 at 18:30
@user1687202 It's simple, in your example you receive (example): Text, Text, Text. If you use templates: [0].Text, [1].Text, [2].Text. First can't be binded as list, second could. In other words you store all data in view with `HiddenFor` and on submit send them. – webdeveloper Sep 21 '12 at 18:46

Asp.Net MVC 3 - Persist a List through different Views

1 Answers1