使用代码创建控件怎么设置控件ID

使用代码创建控件如何设置控件ID
如题              

  SqlDataSource   conn   =   new   SqlDataSource();
                conn.ConnectionString   =   ConfigurationManager.ConnectionStrings[ "xinkepc_data "].ToString();
                conn.ProviderName   =   ConfigurationManager.ConnectionStrings[ "xinkepc_data "].ProviderName;
                conn.SelectCommand   =   "select   *   from   ad ";

控件的ID该怎么设置呢

------解决方案--------------------------------------------------------
conn.ID= "SqlDataSource1 ";