创建list ALV tree[RS_TREE_LIST_DISPLAY]详解编程语言

ABAP程序中的ALV显示是很常用的一种数据展示手段，除了常规的alv，有时也会用到ALV tree这种有层次结构的展示方式更好的展现数据，下面介绍一个创建list alv tree的方法：

1）用函数RS_TREE_CONSTRUCT构造alv 树的层次结构，

alv tree的节点类型(node type)分两种：T和P，区别如下：区别就是个文件夹的图标。

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2）调用函数RS_TREE_LIST_DISPLAY显示alv tree

完整代码：

用list alv tree来显示采购订单和采购订单行项目。

REPORT ztest_tree_alv. 

*Data declaration for additional node information 

DATA : gwa_node TYPE snodetext. 

*Internal table for nodes 

DATA : git_node LIKE TABLE OF gwa_node. 

DATA:git_ekko TYPE STANDARD TABLE OF ekko WITH HEADER LINE, 

 git_ekpo TYPE STANDARD TABLE OF ekpo WITH HEADER LINE. 

CLEAR : gwa_node. 

REFRESH: git_node. 

SELECT * 

 FROM ekko 

 INTO TABLE git_ekko 

 UP TO 10 ROWS. 

SELECT * 

 INTO TABLE git_ekpo 

 FROM ekpo 

 FOR ALL ENTRIES IN git_ekko 

 WHERE ebeln = git_ekko-ebeln. 

gwa_node-type = T. "第一个 

gwa_node-id = FIRST. 

gwa_node-name = 采购. 

gwa_node-tlevel = 1. "层次一 

gwa_node-nlength = 15. 

gwa_node-color = 4. 

gwa_node-text = 采购订单信息. 

gwa_node-tlength =20. 

gwa_node-tcolor = 3. 

APPEND gwa_node TO git_node. 

LOOP AT git_ekko. 

 CLEAR gwa_node. 

 gwa_node-type = P. 

 gwa_node-id = HEAD. 

 gwa_node-name = 采购订单号. 

 gwa_node-tlevel = 2. "层次二 

 gwa_node-nlength = 8. 

 gwa_node-color = 1. 

 gwa_node-text = git_ekko-ebeln. 

 gwa_node-tlength =20. 

 gwa_node-tcolor = 4. 

 APPEND gwa_node TO git_node. 

 CLEAR gwa_node. 

 LOOP AT git_ekpo where ebeln = git_ekko-ebeln. 

 CLEAR gwa_node. 

 gwa_node-type = P. 

 gwa_node-id = ITEM. 

 gwa_node-name = 行项目. 

 gwa_node-tlevel = 3. "层次三 

 gwa_node-nlength = 6. 

 gwa_node-color = 1. 

 gwa_node-text = git_ekpo-ebelp. 

 gwa_node-tlength =5. 

 gwa_node-tcolor = 4. 

 APPEND gwa_node TO git_node. 

 CLEAR gwa_node. 

 ENDLOOP. 

ENDLOOP. 

*Fm for constructing the tree 

CALL FUNCTION RS_TREE_CONSTRUCT 

 TABLES 

 nodetab = git_node. 

*FM for displaying the tree 

CALL FUNCTION RS_TREE_LIST_DISPLAY 

 EXPORTING 

 callback_program = sy-repid 

 check_duplicate_name = 1 

 color_of_node = 4 

 color_of_mark = 3 

 color_of_link = 1 

 color_of_match = 5 

 node_length = 30 

 text_length = 75 

 use_control = L.

运行结果：

img >

以上。

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