Convert a List into an ObservableCollection

Question

I have a List<T> which is being populated from JSON. I need to convert it into an ObservableCollection<T> to bind it to my GridView.

Any suggestions?

Duplicate - http://stackoverflow.com/questions/9069445/the-best-way-to-convert-listobject-to-observablecollectionobject/41731406#41731406 — vapcguy, Jan 18 '17 at 23:53
It is duplicate but its a bit too late since this question amounted way more attention. and you linking for your own answer seems rather low. IMO your answer expands unnecessarily out of the focus of the question. if the OP has `List` no matter how many levels it has, it can do `ObservableCollection xxx = new(listT);` — Barreto, May 13 '23 at 13:26

score 309 · Accepted Answer · edited Sep 13 '17 at 04:14

309

ObservableCollection < T > has a constructor overload which takes IEnumerable < T >

Example for a List of int:

ObservableCollection<int> myCollection = new ObservableCollection<int>(myList);

One more example for a List of ObjectA:

ObservableCollection<ObjectA> myCollection = new ObservableCollection<ObjectA>(myList as List<ObjectA>);

edited Sep 13 '17 at 04:14

Casper

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answered May 08 '13 at 04:12

Denis

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I prefer this over creating an extension method. Helps keep dependency count down. – markokstate Oct 25 '17 at 17:30
1

How to achieve vice versa ? – Arun Prasad Jul 13 '18 at 05:48
@ArunPrasad var myList = myCollection.toList(); – leoap Sep 20 '20 at 11:55

score 19 · Answer 2 · answered May 08 '13 at 04:10

19

ObervableCollection have constructor in which you can pass your list. Quoting MSDN:

 public ObservableCollection(
      List<T> list
 )

answered May 08 '13 at 04:10

Piotr Stapp

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score 7 · Answer 3 · answered Jun 22 '16 at 15:25

The Observable Collection constructor will take an IList or an IEnumerable.

If you find that you are going to do this a lot you can make a simple extension method:

    public static ObservableCollection<T> ToObservableCollection<T>(this IEnumerable<T> enumerable)
    {
        return new ObservableCollection<T>(enumerable);
    }

Convert a List into an ObservableCollection

3 Answers3

Linked