数据窗口主从窗口

可以通过POWERSCRIPT中的SHAREDATA函数在主从数据窗口见共享数据。在这种情况下，请不要添加数据。为使用N_CST_DWSRV_LINKAGE对象实现用主窗口中某列作为从数据窗口的检索参数，需执行以下步骤：  
  1。激活与主数据窗口的连接服务；  
  DW_MASTER.OF_SETLINKAGE(TRUE)  
  2。激活与从数据窗口的联接服务；  
  DW_DETAIL.OF_SETLINKAGE(TRUE)  
  3。在从数据窗口中实现与主数据窗口的连接；  
  dw_detail.inv_linkage.of_setmaster(dw_master)  
  4。注册相关列；  
  dw_detail.inv_linkage.of_register("emp_id","emjp_id")  
  5。指定当主数据窗口的记录焦点改变时，从数据窗口的操作（本例为检索新的记录）；  
  dw_detail.inv_linkage.of_setstyle(dw_detail.inv_linkage.retrieve)  
  6。调用连接服务中的OF_SETTRANSOBJECT函数为所有在连接连中的数据窗口建立事物对象，该函数是数据窗口的最高级函数；  
  dw_master.inv_linkage.of_settransobject(sqlca)  
  7。对数据窗口的PFC_RETRIEVE事件增加检索逻辑（对与检索风格，用户只需对主数据窗口的PFC_RETRIEVE事件编写代码）；  
  return   this.retrieve()  
  8。调用主窗口的OF_RETRIEVE函数；  
  if   dw_master.of_retieve()=-1   then  
  messagebox("错误"，“retrieval   error”)  
  else  
  dw_master.setfocus()  
  end   if  
  8。按要求调用其他连接服务函数  

 

  =======================  
  //Enable   Linkage   Services  
  dw_1.of_setlinkage(true)  
  dw_2.of_setlinkage(true)  
   
  //   Link   this   dw   to   its   master.  
  dw_2.inv_linkage.of_SetMaster(dw_1)  
   
  //Register   the   common   columns  
  dw_2.inv_linkage.of_register(is_col_1,is_col_2)  
   
  //   Set   up   visual   confirmation   of   saves   and   deletes.  
  dw_1.inv_linkage.of_SetUpdateOnRowChange   (True)  
  dw_1.inv_linkage.of_SetConfirmOnRowChange   (True)  
   
  //Enable   required   column   services  
  dw_1.of_SetReqColumn(TRUE)  
  dw_2.of_SetReqColumn(TRUE)  
   
  //Option     of   of_setusecollinks  
  dw_2.inv_linkage.of_setusecollinks(li_collinks_option)  
  //dw_2.inv_linkage.of_setusecollinks(2)   //1=FILTER,2=RETRIEVE,3=SCROLLTOROW  
   
  //Set   the   manner   of   the   update   chain   to   bottom-up   FOR   DETAIL  
  //dw_1.inv_linkage.of_setUpdateBottomUp(FALSE)  
  dw_1.inv_linkage.of_SetUpdateStyle   (dw_1.inv_linkage.TOPDOWN)  
  dw_2.inv_linkage.of_SetUpdateStyle   (dw_2.inv_linkage.TOPDOWN)  
   
  //Confirm   deletes  
  dw_1.inv_linkage.of_SetConfirmOnDelete   (True)  
  dw_2.inv_linkage.of_SetConfirmOnDelete   (True)  
   
  //Set   the   style   of   the   cascaded   deletes   from   the   master   datawindow  
  dw_1.inv_linkage.of_SetDeleteStyle(1)       //DELETE_ROWS   from   the   database  
   
  //   Set   up   visual   confirmation   of   saves   and   deletes.  
  //   This   will   be   the   initial   setting   for   the   example.  
  dw_2.inv_linkage.of_SetUpdateOnRowChange   (True)  
  dw_2.inv_linkage.of_SetConfirmOnRowChange   (True)  

 

===================================================

this.of_setlinkage( true)
dw_1.of_setlinkage( true)
this.inv_linkage.of_linkto( dw_1)
this.inv_linkage.of_setstyle( this.inv_linkage.retrieve )
//this.inv_linkage.of_setarguments( /*string as_masterarg*/, /*string as_detailarg */)

//参数条件，顺序必须与SQL语句中定义的顺序一致
this.inv_linkage.of_setarguments('dict_type','dict_type')
this.inv_linkage.of_setarguments('status','有效')
dw_1.inv_linkage.of_settransobject(sqlca)

this.inv_linkage.of_SetUpdateOnRowChange(true)
this.inv_linkage.of_SetConfirmOnRowChange(true)