public static string GetQuestionLevelIndex(QuestionNode node)
{
List <string> strList = new List <string>();
do
{
strList.Add((node.Index + 1).ToString());
node = (QuestionNode)node.Parent;
} while (node != null);
string str = "";
for (int i = strList.Count - 1; i >= 0; i--)
{
str += strList[i];
if (i > 0)
{
str += ".";
}
}
return(str);
}