第一种：

 string sql = "select meeting_no,meeting_name from meeting " +
   "where meeting_company_no= '" + Form_Home.company_no + "' order by meeting_created_time desc";
 DataSet dsMeeting = DBHelpers.select(Form_Home.connectionString, sql);

 if (dsMeeting != null)
 {
     if (dsMeeting.Tables.Count > 0)
     {
         if (dsMeeting.Tables[0].Rows.Count > 0)
         {
             for (int i = 0; i < dsMeeting.Tables[0].Rows.Count; i++)
             {

             ComboBox_MeetingName.Items.Add(dsMeeting.Tables[0].Rows[i]["meeting_name"].ToString().Trim());



             }

         }
     }
 }

第二种：

 string sql = "select meeting_no,meeting_name from meeting " +
   "where meeting_company_no= '" + Form_Home.company_no + "' order by meeting_created_time desc";
 DataSet dsMeeting = DBHelpers.select(Form_Home.connectionString, sql);

 if (dsMeeting != null)
 {
     if (dsMeeting.Tables.Count > 0)
     {
         if (dsMeeting.Tables[0].Rows.Count > 0)
         {
         

             ComboBox_MeetingName.DisplayMember = "meeting_name "; // 显示的字段
             ComboBox_MeetingName.ValueMember = "meeting_no";     // 值的字段


             ComboBox_MeetingName.DataSource = dsMeeting.Tables[0];
             ComboBox_MeetingName.SelectedIndex = 0;
         }
     }
 }