如何优化"两个下拉列表分别邦定两个表中不同的字段"
											DropDownList   market_type=(DropDownList)e.Item.FindControl("DDL_market_type");   
          //绑定市场分类下拉菜单的值;   
        string   strSqlDDL1   =   null;   
      strSqlDDL 1  =   "select   users_mt_name1,users_mt_id1   from   t_users_market_type1  ";   
      SqlDA 1  =   new   SqlDataAdapter(strSqlDDL,ClassLib.DbConn.SqlConn);   
      DataSet   SqlDS   =   new   DataSet();   
      SqlDA1.Fill(SqlDS,"t_users_market_type1  ");   
      market_type1.DataTextField   =   "users_mt_name";//出错行   
      market_type1.DataValueField   =   "users_mt_id";   
      market_type1.DataSource   =   SqlDS.Tables["t_users_market_type1  "].DefaultView;   
      market_type1.DataBind();   
string   strSqlDDL2   =   null;   
      strSqlDDL2   =   "select   users_mt_name2,users_mt_id2   from   t_users_market_type  ";   
      SqlDA 2  =   new   SqlDataAdapter(strSqlDDL,ClassLib.DbConn.SqlConn);   
      
      SqlDA2.Fill(SqlDS,"t_users_market_type2");   
      market_type2.DataTextField   =   "users_mt_name";//出错行   
      market_type2.DataValueField   =   "users_mt_id";   
      market_type2.DataSource   =   SqlDS.Tables["t_users_market_type2  "].DefaultView;   
      market_type2.DataBind();   
这样的代码看上去好像有很多重复性,号比如那个那2条Sql语句,应该可以用一条就行了.好比如那个SqlDA.Fill(),是不是可以一下子就可以Fill2个进去?要是能改成下面的代码多好呀,可惜运行显示不了DropDownList的内容!请问如何改进下面的代码?
     string   strSqlDDL1   =   null;   
      strSqlDDL 1  =   "select   users_mt_name1,users_mt_id1 ,users_mt_name2,users_mt_id2     from      t_users_market_type1 , t_users_market_type2 ";   
      SqlDA 1  =   new   SqlDataAdapter(strSqlDDL,ClassLib.DbConn.SqlConn);   
      DataSet   SqlDS   =   new   DataSet();   
      SqlDA1.Fill(SqlDS,"t_users_market_type1,t_users_market_type2   ");   
      market_type1.DataTextField   =   "users_mt_name";//出错行   
      market_type1.DataValueField   =   "users_mt_id";   
      market_type1.DataSource   =   SqlDS.Tables["t_users_market_type1 ,t_users_market_type2  "].DefaultView;   
      market_type1.DataBind();