private void txtsearch_EditValueChanged_1(object sender, EventArgs e) { if (txtsearch.Text.Equals("") == false) { dsDaiLy = BUS_DaiLy.Search(txtsearch.Text); UpdateGvDaiLy(); } else { dsDaiLy = BUS_DaiLy.DsDaiLy(); UpdateGvDaiLy(); } }