编辑1

某大型国企试用的网上订餐管理系统完整源代码

select name ,url ,help_topic_ID  from  help_topic where help_topic_ID>'300' and help_topic_ID<'353' 


select name as '名称' ,url as '按时' , help_topic_ID as '序号' from  help_topic  where help_topic_ID>'300' and help_topic_ID<'353' 

  MessageBox.Show("请输入密码！","提 示",MessageBoxButtons.OK ,MessageBoxIcon.Exclamation );
  
  
  if (con.State != ConnectionState.Open)
con.Open();
}