listView为什么显示不了？

Question

设置this.listView1.View ==View.Details

Answer 1

this.listView1.View = View.List;

Answer 2

换个方法试试：
SqlCommand cmd = new SqlCommand("sql", sqlConnection1);
SqlDataReader sdr = cmd.ExecuteReader();
while(sdr.Read())
{
  ListViewItem lv1 = new ListViewItem(sdr[0].ToString());
                                    lv1.SubItems.Add(sdr[1].ToString());
                                    lv1.SubItems.Add(sdr[2].ToString());
                                    lv.Items.Add(lv1);
}
sdr.Close();
sqlConnection1.Close();