// Assumes index >= 0, returns null if index >= Count
public object GetDataItem(int index)
{
Debug.Assert(index >= 0);
IList list = this.List;
if (list != null)
{
return((index < list.Count) ? list[index] : null);
}
PagedCollectionView collectionView = this.DataSource as PagedCollectionView;
if (collectionView != null)
{
return((index < collectionView.Count) ? collectionView.GetItemAt(index) : null);
}
IEnumerable enumerable = this.DataSource;
if (enumerable != null)
{
IEnumerator enumerator = enumerable.GetEnumerator();
int i = -1;
while (enumerator.MoveNext() && i < index)
{
i++;
if (i == index)
{
return(enumerator.Current);
}
}
}
return(null);
}
// Assumes index >= 0, returns null if index >= Count
public object GetDataItem(int index)
{
Debug.Assert(index >= 0, "Expected positive index.");
IList list = this.List;
if (list != null)
{
return((index < list.Count) ? list[index] : null);
}
#if FEATURE_PAGEDCOLLECTIONVIEW
PagedCollectionView collectionView = this.DataSource as PagedCollectionView;
if (collectionView != null)
{
return((index < collectionView.Count) ? collectionView.GetItemAt(index) : null);
}
#endif
IEnumerable enumerable = this.DataSource;
if (enumerable != null)
{
IEnumerator enumerator = enumerable.GetEnumerator();
int i = -1;
while (enumerator.MoveNext() && i < index)
{
i++;
if (i == index)
{
return(enumerator.Current);
}
}
}
return(null);
}