if (childlist != null && childlist.count > 0)
{
if (!string.isnullorempty(removeid) && childlist.containskey(removeid))
{
childlist.remove(removeid);
}
foreach (keyvaluepair<string, string> entry in childlist)
{
if (_dropdowntree.getchildcategory(entry.key) != null)//存在子
{
currentsign = getprefix(lastonecount == childlist.count, true, parrentsign);
listitem = new listitem(currentsign + entry.value, entry.key);
parentkeylist.enqueue(entry.key);//当前的节点id
parentsignlist.enqueue(currentsign);//当前的节点符号
}
else//不存在子
