Stuff

//where i search to delete all row        while (true) {            TreeIter item = this.listStore.getIter("0");            if (item == null)                break;            this.listStore.removeRow(item);        }// the handler of the onclick event    public String getCommandFromList(TreeIter item) {        if (item != null) {            return this.listStore.getValue(item,                    (DataColumnString) this.dataColumns[0]).toString();        }        return "";    }