private void message_log_meisai_disp()
 {
     if (dgv_message_log.SelectedRows.Count >= 1)
     {
         tb_message_datetime.Text   = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][0].ToString();
         tb_user_cd_from.Text       = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][1].ToString();
         tb_user_cd_from_name.Text  = tss.get_user_name(dgv_message_log.CurrentRow.Cells[1].Value.ToString());
         tb_user_cd_to.Text         = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][2].ToString();
         tb_user_cd_to_name.Text    = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][3].ToString();
         tb_message_syori_name.Text = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][4].ToString();
         tb_message_naiyou.Text     = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][5].ToString();
         tb_kidoku_datetime.Text    = w_dt_message_log.Rows[dgv_message_log.CurrentRow.Index][6].ToString();
         if (tb_kidoku_datetime.Text.Length == 0)
         {
             btn_kidoku.Visible = true;
         }
         else
         {
             btn_kidoku.Visible = false;
         }
     }
 }