Build a tree with recursion

Question

I need to Create a tree and with recursion (not to use SAP FM)
and i have a tree like the following
assume i have a root like
root is level  1 -> customer 
child level 2 -> like contact person & address
child level 3 like visiting hours (contact person ) & Email address (adress )
e.g. of the table that i need to provide as output is
item              parent_key   child_key         
customer                 0001         
contant person         0001         0002
address                   0001         0002
vist                        0002         0003
email                      0002         0003
etc...
let say i get as input always the root and i check for his child and for this node i
look for his child etc how can i provide a table like the above table
Thanks and Regards
James

Answer 1

Hi,
build your tree step-by-step:
-root node is always shown -> initially add it to the node table of your alv-tree
->user expands root node
->event expand_no_children has to be handled
->check which node threw that event
->if root node, select all persons
->add the person nodes to your alv-tree node-list, as parent use the root node
->refresh alv tree
->user expands person-node
->event expand_no_children has to be handled
->check which node threw that event
->if person node, select all visiting hours
->add the visiting hour nodes to your alv-tree node-list, as parent use the person node
->refresh alv tree
Greetings,
dsp