ASP.NET MVC3 - ICollection Editor AddRemove Items

Question

I know how EditorTemplates work in ASP.NET MVC3. I read a lot and make some research but could not find anything that could help me.

I have a simple model:

public class MyModel
{
     public string Name { get; set; }
     public virtual ICollection<SubModel> SubModels { get; set; }
}

What I would like to do is to be able to add/remove SubModel when I edit MyModel...

If you look at the `ICollection` interface you will see that it does not have methods to add or remove items, use `IList` instead. — Davor Zlotrg, Nov 06 '13 at 18:37
@DZL the [`ICollection`](http://msdn.microsoft.com/en-us/library/92t2ye13.aspx) interface definitely has `Add` and `Remove` methods. It's the [recommended](http://stackoverflow.com/questions/7655845/icollectiont-vs-listt-in-entity-framework) collection type for Entity Framework. — Henk Mollema, Nov 06 '13 at 18:59
It's not clear to me what your asking. Could you elaborate? Also have you tried anything yourself? We can't help you with questions like this. — Henk Mollema, Nov 06 '13 at 19:03
@HenkMollema Yes, ICollection has Add and Remove, not ICollection — Davor Zlotrg, Nov 06 '13 at 19:03
@DZL ah my bad, you're right. Never seen the non-generic `ICollection` hehe. — Henk Mollema, Nov 06 '13 at 19:05
@HenkMollema, to make things simple : Let's say you have an apple tree (MyModel). You edit the tree. On the same page, you can change it's name and add or remove apples (SubModel) from the tree.... — Baral, Nov 06 '13 at 20:15
Then why don't you use a generic `ICollection` which makes adding and removing items trivial. — Henk Mollema, Nov 06 '13 at 20:52

score 0 · Accepted Answer · answered Nov 07 '13 at 13:07

You may take a look at the following blog post in which Steven Sanderson presents a nice approach to handle this. He also used a custom Html.BeginCollectionItem helper in order to generate non sequential indexes for the corresponding input fields and enable to dynamically add/remove rows.

ASP.NET MVC3 - ICollection Editor AddRemove Items

1 Answers1