Comments on: ASP.NET MVC Tip #1: Using Custom ViewModels with POST action methods

By: Adrian Grigore

Adrian Grigore — Fri, 16 Jul 2010 07:47:42 +0000

@Ross: Yes, but TryUpdateModel will not update a viewmodel from an DTO when constructing the view (GET request).

Also, I don’t like working with FormCollections for POST requests, because it makes unit testing less intuitive. Even though I’ve writting a helper method that creates a fake http context from a model for unit testing, I still prefer custom ViewModels as POST action method parameters

By: Ross McLoughlin

Ross McLoughlin — Thu, 15 Jul 2010 14:28:48 +0000

@Adrian:

Nice article. I was stuck on this for a while this morning. Just a quick point regarding your last post. I have looked at automapper, and it does indeed look nice. But does TryUpdateModel(,) in MVC 2 not do the same thing?

For example, I could easily map a FormCollection passed in as a parameter to an Action and map it to a Entity using this TryUpdateModel.

By: Adrian Grigore

Adrian Grigore — Fri, 25 Jun 2010 10:33:08 +0000

Thanks for the hint! So far I’ve been using Automapper for that, it seems quite similar to ValueInjector

By: Omu

Omu — Fri, 11 Jun 2010 07:51:36 +0000

you can use ValueInjecter http://valueinjecter.codeplex.com/ for mapping ViewModel to/from Entities, it’s very good for this purpose

By: JBC

JBC — Mon, 29 Mar 2010 19:10:10 +0000

@Philippe: It doesnt appear as though youre setting your properties. Try this:

public class MeditationsFormModel : IFormModel
{
public Meditation Meditation { get; private set; }
public SelectList Types { get; private set; }

public MeditationsFormModel(Meditation meditation)
{
Meditation = meditation;
Types = new SelectList( ::whatever your IEnumerable type is:: , ::whatever your selected value should be:: );
}
}

By: madonionmad

madonionmad — Sun, 28 Mar 2010 16:03:06 +0000

To Philippe:
Sorry, the code i post before invisible
you should use “FirstName” , not “Custom.FirstName”

By: madonionmad

madonionmad — Sun, 28 Mar 2010 16:00:04 +0000

To Philippe:
You should code like this:

Not

because the ViewModelBinder will bind the form to a object Customer, not CustomersFormViewModel.

By: Adrian Grigore

Adrian Grigore — Thu, 25 Feb 2010 11:27:39 +0000

Sorry, I haven’t had the time to have a look at MVC2’s templates yet. I’ve only just migrated my current MVC project to the MVC 2 codebase this week.

By: Ben

Ben — Thu, 25 Feb 2010 11:22:01 +0000

I have found that Html.EditorForModel() doesn’t work in this case; the SelectLists don’t render. If I manually bind the SelectLists using Html.DropdownListFor, it does work. Have you found a way to use EditorForModel() in this case?

By: Al Dass

Al Dass — Wed, 10 Feb 2010 22:00:08 +0000

FYI:

That link to Phil’s site in Adrian’s previous post is invalid… here is the correct link:

“Model Binding To A List”
http://haacked.com/archive/2008/10/23/model-binding-to-a-list.aspx