Web Dynpro, Recursive Tree

[Former Member]

Hi all,

In my application I have implemented a recursive tree with node types TreeNodeType and TreeItemType.

The context structure is the following:

CONTENT (context node)

COMPANYCONTENT (recursive context node with the reference to CONTENT)

COMPANYITEM (context node)

NAME (attribute)

ID (attribute)

NAME (attribute)

ID (attribute)

CHILDREN_LOADED (attribute)

The 'dataSource' of the Tree-Element and TreeNodeType-Element are bound to CONTENT.

The 'text' of the TreeNodeType-Element are bound to CONTENT.NAME.

The 'dataSource' of the TreeItemType-Element are bound to CONTENT.COMPANYITEM, the 'text' is bound to CONTENT.COMPANYITEM.NAME.

This is working well. But the problem is I have to change (refresh) the context (basis for the tree) all the time if the user changes the select options in the head of the current view. In this case, if I simply delete the context element of CONTENT node, the application goes down with the error message:

'The assert condition is violated'.

And this occurs only if the refreshment is provided at the moment when all tree levels are closed.

My question is: what is the correct way to refresh the context and this recursive tree, respectively?

Kind regards,

Oleksandr

[arjun_thakur · Accepted solution]

Hi Oleksandr,

Refer SAP Note Number: 1256744.

Regards

Arjun

[Former Member · Accepted solution]

Thanks for advice!

Now I defined that if I after expanding the tree navigate to antoher view and then back to the view with the tree, I get the same dump.

Exactly the same problem was posted in

I do not know whether the SAP note helped or not.

Have somebody already solved a similar problem?

Kind regards,

Oleksandr

[Former Member · Accepted solution]

Hi Arjun,

I installed this Note, without success, however.

Would you have any other ideas?

Kind regards,

Oleksandr

[former_member40425]

Hi,

In order to refresh use invalidate node that is bounded to tree.

Data: l_node type ref to if_wd_context_node.
 
l_node = wd_context->get_child_node(  'NODENAME' ).
l_node->invalidate( ).

I hope it helps.

Regards,

Rohit

[Former Member]

Hi Rohit,

Your information help me a lot.

Regards,

Eric