private void button_keyword_search_Click(object sender, EventArgs e) { listBox_lv3.Items.Clear(); listBox_lv2.Items.Clear(); listBox_lv1.ClearSelected(); textBox_search_code.Clear(); consMgr.setAPLv3ByKeywordsSearch(listBox_lv3, textBox_search_keywords.Text.Trim().Replace(" ", "").Replace(" ", "").Replace(",", ",")); }