ASP.NET MVC How to post complex model

Question

I faced a problem. I can't figure out how to post collection with dependency. I'll show you a code then it maybe clearer what I'm trying to achieve.

I have ViewModel:

public class ProjectViewModel : BaseViewModel
{
    public int Id { get; set; }
    public string Customer { get; set; }
    public string CustomerRepresentative { get; set; }
    public string ProjectTitle { get; set; }
    public string WWSNumber { get; set; }
    public List<Los> Service { get; set; }
}

LosViewModel:

public class Los
{
    public int LosNumber { get; set; }
    public string Service { get; set; }
    public List<Pos> Pos { get; set; }
}

Pos view model:

public class Pos
{
    public int PosNumber { get; set; }
    public string PosDescription { get; set; }
}

As you see first ViewModel has list. That meens that when user fills LosNumber and enters Service he can add to it PosNumber and PosDescription.

I can't find information how to post with Razor such model. All I have found is how to display such ModelViewm but not edit.

Maybe somebody had faced this kind of problem ? Any help ?

It looks your problem is bigger than a complex post. This isn't really a complex model, MVC will know how to serialize your posted data. Your post method just needs to have the model type as the receiving parameter. public ActionResult MyPostMethod(ProjectViewModel model) — pmeyer
– pmeyer, Commented Aug 26, 2016 at 13:33
Not sure if that's the issue you are having or if you dont know how to perform the post at the view level. — pmeyer
– pmeyer, Commented Aug 26, 2016 at 13:34
Ok can you please share your View OR .cshtml page where you want to Implement the same . — Sunil Kumar
– Sunil Kumar, Commented Aug 26, 2016 at 13:52

Community · Accepted Answer · 2017-05-23 12:08:22Z

2

You need to put the collection into a for loop in your view, then reference the object by index on the collection. MVC is smart enough to figure out that this is a collection when you post it back. Something like...TextBoxFor(m => Model.Service[i].LosNumber). The collection inside a collection will most likely just be a nested for loop.

MVC Razor view nested foreach's model

edited May 23, 2017 at 12:08

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answered Aug 26, 2016 at 13:58

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9 Comments

Daniil T. Over a year ago

It the approach when you Lenght of the object that you want to display is known. But in my case I can't tell how much elements there will be in List. Maybe I should ask how to dynamically create EditorFor boxes with Indexes.

pmeyer Over a year ago

you can do a for loop inside razor on the list and that way you can get the index == i to generate the controls.

Daniil T. Over a year ago

@pmeyer Tell me how are you doing loop without knowing the lenght of the object ?

pmeyer Over a year ago

That's easy @DaniilT. for (int i = 0; i < Model.Service.Count(); i++) { //do stuff for each service }

pmeyer Over a year ago

Again.. heres an duplicate question to yours stackoverflow.com/questions/8894442/…

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