PB数据窗口通用查询代码

Available query,support many tables with parameters. Only need to post one parameter(datawindow), then you can free. To use this function,you should call function: gf_set_query(datawindow ad_dw) ad_dw : The main datawindow that you want to be queried. query.pbl : Query with parameters,must define a event(ue_retrieve) in datawindow to execute the retrieve function with(without) parameters. This function use the transaction sqlca twice. rule: The column that be queried must be visible, and the datawindow must have a text control named after 'column_t'. object: dw_jzh_query : Query datawindow. gf_add_where : Add where for the datawindow. gf_set_query : Query (main function). w_jzh_query : Query window (main window). Maybe you want to post a specific window for some usage, such as retain the query conditions,you can do it youself, or,you can ask me for help. //v.2.1 //jzh(jzhaohua@263.net) 2002/05/04 04:02 ============================================================= 通用查询,支持多表关联、带参数 只需要传递一个参数datawindow,剩下的一切交给这个函数去完成,看看她功能的强大吧 使用此功能调用方法: gf_set_query(datawindow add_dw) ad_dw : 被查询数据窗 query.pbl : 可带参数查询,必须在被查询数据窗上定义一个事件 ue_retrieve, 来执行 retrieve 函数(带参数或不带参数) 本功能使用sqlca事务对象两次 规则 : 被查询列必须是可视的,并且该数据窗必须有一个以 '列名_t' 命名的text控件 对象 : dw_jzh_query : 查询数据窗 gf_add_where : 为数据窗添加 where 语句 gf_set_query : 查询函数 w_jzh_query : 查询窗口 如果你想保存上次的查询条件,可以传递一个窗口,你可以自己来做,也可以找我帮忙. //版本.2.1 //jzh(jzhaohua@263.net) 2002/05/04 04:02