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using System.Data.SqlClient;    
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          SqlConnection conn = new SqlConnection("server=QLPC\\SQL2005;uid=sa;pwd=£¨ÄãµÄÃÜÂ룩;database=£¨ÄãµÄÊý¾Ý±í£©");                  //ÓÃÓÚÁ¬½ÓÊý¾Ý¿â
            conn.Open();       //´ò¿ªÊý¾Ý¿â
            SqlCommand cmd = new SqlCommand("select * from [user]", conn);              //Ï൱ÓÚÖ´ÐÐÊý¾ÝÓï¾ä°É
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