aspxgrideview的模板列中如何把多行一列的table绑定到aspxcombox上??急~~~

我现在从数据库中取出的数据如下:
sqlconnection Conn=new sqlconnection(strConn);
conn.open();
string strSql = "select s_kmbm from km order by s_kmbm";
  DataSet   ds=new   DataSet();
  sqlDbDataAdapter   Da=new   sqlDbDataAdapter(strSql,Conn);
  Da.Fill(ds,"bind");

如何把这一张表绑定到combox上???