public void printfs(object sender, Ext.Net.DirectEventArgs e)
{
bindUser();
RowSelectionModel sm = GridPanel1.GetSelectionModel() as RowSelectionModel;
List <string> ids = new List <string>();
ids = sm.SelectedRows.Select(row => row.RecordID).ToList <string>();
List <EB_Student> namelist = (from people in stulist
where people.Id == ids[0]
select people).ToList <EB_Student>();
X.Call("SelectNum", namelist);
}