public void filter(FriendsCustomAdapter adapter, string constraint)
{
if (constraint != null && constraint.Length > 0)
{
ObservableCollection <UserItem> matchList = new ObservableCollection <UserItem>();
foreach (UserItem item in adapter.persons.ToList())
{
if (item.Name.StartsWith(constraint.ToString()))
{
matchList.Add(item);
}
}
adapter.persons = matchList;
adapter.NotifyDataSetChanged();
}
}
public FriendsFilter(FriendsCustomAdapter friendsCustomAdapter)
{
this.friendsCustomAdapter = friendsCustomAdapter;
}