private void xóaToolStripMenuItem_Click(object sender, EventArgs e) { int count, i; ListViewItem lvitem; count = this.lvdssv.Items.Count - 1; for (i = count; i >= 0; i--) { lvitem = this.lvdssv.Items[i]; if (lvitem.Checked) { qlsv.xoa(lvitem.SubItems[0].Text, sstheoma); } } this.loadlistview(); qlsv.ghifile(); }