protected void btnSaveReordering_Click(object sender, EventArgs e)
{
JavaScriptSerializer js = new JavaScriptSerializer();
string json = hdnGetJosnResult.Value;
var flatSubjects1 = js.Deserialize<Plugghest.Base2.Subject[]>(json).ToList();
BaseHandler sh = new BaseHandler();
sh.UpdateSubjectTree(flatSubjects1);
BindTree();
}