OleDbDataAdapter 至少有一个参数没有指定,该如何解决

OleDbDataAdapter 至少有一个参数没有指定
OleDbConnection   OldConn   =   new   OleDbConnection(连接字符串);
                OldConn.Open();
                DataSet   Ds   =   new   DataSet( "BBSList ");
                string   CommandText   =   "SELECT   TOP   10   BBSLIst   ORDER   BY   BBSID   DESC; ";                        
                OleDbDataAdapter   OldDap   =   new   OleDbDataAdapter(CommandText,   OldConn);                
                OldDap.Fill(Ds,   "BBSList ");
                OldConn.Close();

为什么上面的语句出错。。说我至少有一个参数没有指定！


------解决方案--------------------------------------------------------
OleDbConnection OldConn = new OleDbConnection(连接字符串);
OldConn.Open();
DataSet Ds = new DataSet();
string CommandText = "SELECT TOP 10 BBSLIst ORDER BY BBSID DESC; ";
OleDbDataAdapter OldDap = new OleDbDataAdapter(CommandText, OldConn);

OldDap.Fill(Ds, "BBSList ");
OldConn.Close();