我想实现的效果是，点击哪一行，（我用DataGridView做的），GroupBox航班详细信息中显示出对应的。下面是我写的代码

private void dgvTicketInfo_MouseClick(object sender, MouseEventArgs e)
        {
            try
            {
                DBHelper.con.Open();
                int Id = Convert.ToInt32(dgvTicketInfo.SelectedRows[0].Cells["Id"].Value);
                string sql = string.Format("select LeaveCity,Destination,LeaveTime,SecondClass,FirstClass from TicketInfo where Id={0}", Id);
                SqlCommand com = new SqlCommand(sql, DBHelper.con);
                SqlDataReader reader = com.ExecuteReader();
                while (reader.Read())
                {
                    txtTo.Text = reader[0].ToString();
                    txtFrom.Text = reader[1].ToString();
                    txtLeaveTime.Text = reader[2].ToString();
                    txtSecondClass.Text = reader[3].ToString();
                    txtFirstClass.Text = reader[4].ToString();
                }
                reader.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                DBHelper.con.Close();
            }


航班详细信息是一个grp，里面又多个Text box 想选中DGV里面的某一列，显示在下面的Text box里（不可编辑）