private FilterBase GetFilter(string s)
{
if(_fileFilter == null) {
throw new Exception("FileFilter not set");
}
int count = _fileFilter.FilterCount;
for(int i = 0; i < count; i++) {
FilterBase filter = _fileFilter.GetFilter(i);
if(filter.Name != null && filter.Name == s) {
return filter;
}
}
return null;
}