Type casting from IEnumerable to ObservableCollection in C#

Question

I want to get all the places which are active for bid. I tries this but I'm getting null.

testObservableList = testObservableList.Where(
                         x => x.IsActiveForBid) as ObservableCollection<Places>;

You good good answers to solve your problem. Be aware though that these solutions (technically) are not type casts. A type-cast is rarely possible between unrelated `IEnumerable` implementations. However, it's neither what you usually need. Creating a new sort of collection with the desired result is usually fine. — Matthias Meid, Sep 24 '12 at 12:48

score 4 · Answer 1 · answered Sep 24 '12 at 12:44

4

try this.

testObservableList = 
new ObservableCollection(testObservableList.Where(x => x.IsActiveForBid));

This will make a shallow copy of the current IEnumerable and turn it in to a ObservableCollection

answered Sep 24 '12 at 12:44

Jonas W

Error: Using the generic type 'System.Collections.ObjectModel.ObservableCollection' requires 1 type arguments – Sep 24 '12 at 17:30
Error:Using the generic type 'System.Collections.ObjectModel.ObservableCollection' requires 1 type arguments – Sep 24 '12 at 17:31

score 3 · Accepted Answer · answered Sep 24 '12 at 12:45

3

While an ObservableCollection<T> is IEnumerable<T> the opposite does not hold. Try a constructor:

new ObservableCollection<SometypeType>(
              testObservableList.Where(x => x.IsActiveForBid))

answered Sep 24 '12 at 12:45

spender

score 2 · Answer 3 · answered Sep 24 '12 at 12:46

2

Try this:

ObservableCollection coll1 = new ObservableCollection(testObservableList.Where(x => x.IsActiveForBid);

I guess this will do it.

answered Sep 24 '12 at 12:46

Ken D

3 Answers3