private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.listView1.SelectedIndices.Count > 0)
{
Application.DoEvents();
switch (this.listView1.CheckedItems[0].SubItems[0].Text.ToString())
{
case "查询时间":
Form sa = new cx();
sa.Show();
break;
case "查询航班":
Form sb = new cx();
sb.Show();
break;
}