private void listFree_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
 {
     Items itm = new Items();
     if (itm.GetFreeItems().Rows.Count != 0)
     {
         DataTable dtItm = itm.GetFreeItems();
         // groupList.Text = "Free Items";
         PopulateList(dtItm, lstDetail);
     }
     else
     {
         //nothing happenes
     }
 }