Problem with Navigation List

[Former Member]

Dear Experts,

I have a problem in executing one of my web dynpro components in which it contains a Navigation list. I am explaining the process which i followed. Please guide me.

Initially, I created a web dynpro component, with a view MAIN, and window WD_MAIN.

In the view MAIN, in the context, I have created a node called 'LINK' within which i have created a recursive node with name 'LINK_RECURSIVE' and two attributes 'TEXT' and 'ENABLED'.

I have also created a supply function for the node LINK in the view MAIN.

The code is as follows:

• data declaration

DATA lt_links TYPE wd_this->elements_links.

DATA ls_links LIKE LINE OF lt_links.

• @TODO compute values

• e.g. call a data providing FuBa

ls_links-text = 'Student information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

CLEAR ls_links.

ls_links-text = 'Associate information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

CLEAR ls_links.

ls_links-text = 'Managers information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

• bind all the elements

node->bind_table(

new_items = lt_links

set_initial_elements = abap_true ).

In the layout of the view MAIN, i have created a Contextual panel within which i have created a Navigation list.

In the properties of the Navigation list i have binded the property for Item source and Item text accordingly.

Now i created an application for this component, and while TESTING it, the browser hangs, and never resumes at all.

Please help me in solving this issue.

NOTE: I have not written any code in WDDOINIT, and WDDOMODIFYVIEW of the view MAIN.

I have taken the reference of the standard component WDR_TEST_EVENTS to build the component.

[Former Member]

Hello ,

Here is the problem in your code

ls_links-text = 'Student information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

CLEAR ls_links.

ls_links-text = 'Associate information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

CLEAR ls_links.

ls_links-text = 'Managers information'.

ls_links-enabled = abap_true.

APPEND ls_links TO lt_links.

The code below is really important

lo_current_node = wd_context->get_child_node( 'LINK' ).

• lo_current_element = lo_current_node->create_element( ).*

lo_current_node->bind_elements( lt_links).

Remove the line below

bind all the elements

node->bind_table(

new_items = lt_links

set_initial_elements = abap_true ).

If you still have problem , please get back to me . I have already implemented it .

Regards

Vivek

PS: Please provide the points if answer is helpful .

[Former Member]

Hi Vivek,

Thanks for the input, I made the changes to the code as you have suggested me to do it.

As a reason it is giving me a short dump and the error is like this..

"The Invalidate Method Is Called on the Same Node MAIN.1.LINKS.1.LINKS_RECURSIVE During the Supply Method "

I feel this error is because of the context node LINKS.

My context node LINKS is like this.

CONTEXT

|

---

LINKS

|-------LINKS_RECURSIVE( Recursive node )

|-------TEXT

|-------ENABLED

I hope you have got the clear idea of the context node LINKS, and suggest me.

NOTE: I have not used any invalidate statement in the code at all.

Thank you