Converting object to List<object>

Question

I've looked at similar questions but nothing quite fits. I have an object which happens to contain a List. I'd like to get it into something I can enumerate.

For example:

object listObject;          // contains a List<Something>
List<object> list;

list = listObject as List<object>;   // list contains null after

foreach ( object o in list )
{
    // do stuff
}

The conversion from object to List<object> is the problem.

EDIT:

What I finished with:

object listObject;          // contains a List<Something>
List<object> list;

IEnumerable enumerable = listObject as IEnumerable;

if ( enumerable != null )
{
    list = enumerable.Cast<object>().ToList();

    foreach ( object o in list )
    {
         // do stuff
    }
}

dmck · Accepted Answer · 2013-03-12 03:35:30Z

7

Try This:

list = (listObject as IEnumerable).Cast<object>().ToList()

answered Mar 12, 2013 at 3:35

dmck

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4 Comments

Sam Harwell Over a year ago

The expression (listObject as IEnumerable).Cast<object>() will throw a NullReferenceException if listObject is cannot be cast to IEnumerable. The expression ((IEnumerable)listObject).Cast<object>() provides a slightly more informative exception if listObject is non-null and does not implement IEnumerable.

BillP3rd Over a year ago

@Corey - I was just waiting the required 10 minutes to Accept.

BillP3rd Over a year ago

@280Z28 - I understand At this point in my code, I'm guaranteed that it'll be a List of something.

Corey Over a year ago

@BillP3rd Sorry. I see a lot of good elegant answers that never get credited is all :)

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