ALV Tree 学习总结.doc

? ALV Tree 学习总结 1、系统中有很多标准的例子：T_cood: DWDM有个中控件的例子。另外Package：SLIS里面有ALV方面的所有例子，参考这些例子就能写出很好的程序。以下是我做的一个程序：功能是多个：sale order的document flow。基本思路：1、查询结果中只显示Order type and number， 点击node才触发获取document flow的功能。这样对于提高性能非常重要。2、call function SD_DOCUMENT_FLOW_GET 可以获得某个order的相关文件。 源代码：注意要在Screen中添加一个user control ：CSALESreport zysdf_04_04.*$*$*$*$ Object Name: ZYSDF_04_04*$*$ Author: CH210276*$*$ Date:*$*$ Copyright:*$*$ Transport Number:*$*$*$*$ Logical Database:*$*$ SAPScript name:*$*$ Application Area: SD*$*$ Description: Sales document flow*$*$*$*$ Purpose: display some sales document flow*$*$*$*$ Correction #*$*$ Modified By*$*$ Date*$*$ Transport Number*$*$include zysdf_04_04_data.include zysdf_04_04_pbo.include zysdf_04_04_pai.include zysdf_04_04_form.INCLUDE zysdf_04_04_class.*$*$*$*$ TOP OF PAGE Event*$*$top-of.* Subroutine for Top of Page event.* perform top_of_page.*$*$*$*$ END OF PAGE Event*$*$end-of.* Subroutine for End of Page event.* perform end_of_page.*$*$*$*$ START OF SELECTION Event*$*$start-of-selection.call screen 101.* Populate the final output table for display*$*$*$*$ END OF SELECTION Event*$*$end-of-selection.*** Include ZYSDF_04_04_DATA**** Essential steps (Search for §)* ~~~~~~~~~~~~~~~* 1.Usual steps when using control technology.* 1a. Define reference variables.* 1b. Create ALV Tree Control and corresponding container.** 2.Create Hierarchy-header* 3.Create empty Tree Control* 4.Create hierarchy (nodes and leaves)* 4a. Select data* 4b. Sort output table according to your conceived hierarchy* 4c. Add data to tree** 5.Send data to frontend.* 6.Call dispatch to process toolbar functions**class cl_gui_cfw definition load.data: g_custom_container type ref to cl_gui_custom_container, custom_containergt_fieldcatalog type lvc_t_fcat, alv tree header fieldg_tree type ref to cl_gui_alv_tree, object of alv treeok_code type sy-ucomm. for screen 101* Structure for