在C＃中将类型从IEnumerable强制转换为ObservableCollection

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>;

Answer 1

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

Answer 2

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

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

Answer 3

Try this:

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

I guess this will do it.