Asp.net MVC 4 razor如何在视图中保存列表时如何在控制器中保留类型

Question

I have a big problem and I'm a little bit disappointed. I can't find a good solution with this problem:

I have CompanyA and CompanyB who specialize Company who has an interface ICompany in my controller. I then load from different databases, companyA and companyB in my List<company> . In my EditorView , I display the different objects companyA and companyB .

When I'm saving, in my controller, my objects in my list aren't to type CompanyA and CompanyB , but they are all of type Company .

How can I keep my types when I save?

Here is some code if my explanation is not clear:

My example CompanyViewModel.cs:

public class CompanyViewModel
{
    #region Properties
    public User User { get; set; }
    public ExternalAccounts ExtAccounts { get; set; }
    public List<Company> Companies { get; set; } // or List<object> Companies { get; set; }
    ....
    #region Ctor
    public CompanyViewModel()
    { }
    public CompanyViewModel(ExternalAccounts extAccount, bool iniPrefLanguage = true)
    {
        //normaly it's load from bdd 
        ...
        Companies = new List<Company>();

        if (test == true)
        {
            Companies.Add(new CompanyA()); // call webService
        }
        if (test2 == true)
        {
            Companies.Add(new CompanyB());

        }
        ...
        #region
}

OR I can have:

    public ActionResult EditCompanies()
    {
        ...

        // Companies = new List<Company>();
         Model.Companies.Add(new CompanyA()); // call webService
         Model.Companies.Add(new CompanyB());                

        return View(Model);
    }

    public ActionResult SaveCompanies(ComapnyViewModel model)
    {
        var test = model.Companies.OfType<CompanyA>(); // return null !!!
        test = model.Companies.OfType<CompanyB>(); // return null !!!!
        test = model.Companies.OfType<Company>(); // return my objects !!!!

        return View();
    }

in view

       @Html.EditorFor(m => m.Companies)

and i have EditorTemplate with Company.cshtml, CompanyA.cshtml, CompanyB.cshtml

During my load in View, each object in my list go to the right EditorTemplate (CompanyA and CompanyB)

But when i save... I have a list of company type only ...

Any ideas? Thank you!

Answer 1

What I did is:

I created a view with Company as model, and a partial view with CompanyA as model, and another view with CompanyB as model. Inside CompanyView, I called Html.Partial("CompanyAView", Model) and Html.Partial("CompanyBView", Model) .

I hope this helps.