Error While Calling action on dynamically created checkboxes

[Former Member]

Hi,

I am calling on_toggle action on dynamicallly created checkboxes . It is giving me error : " Access Via Null Object Not Possible "

please help.

Thanks,

Pratibha

[Former Member]

answered

[arjun_thakur]

Hi Pratibha,

I am using the following code in one of my component and it is working fine for me.

 DATA: LR_CONTAINER TYPE REF TO CL_WD_UIELEMENT_CONTAINER,
        LR_CHECKBOX TYPE REF TO CL_WD_CHECKBOX,
        LR_NODE TYPE REF TO IF_WD_CONTEXT_NODE.

  CHECK FIRST_TIME = ABAP_TRUE.

  LR_CONTAINER ?= VIEW->GET_ROOT_ELEMENT( ).




  CL_WD_MATRIX_LAYOUT=>NEW_MATRIX_LAYOUT( CONTAINER = LR_CONTAINER ).

  LR_CHECKBOX = CL_WD_CHECKBOX=>NEW_CHECKBOX( BIND_CHECKED = 'NODE2.ATTR1'
                                              BIND_TEXT    = 'NODE2.ATTR2'
                                              ON_TOGGLE = 'TOGGLE'
                                                  ).

  CL_WD_MATRIX_HEAD_DATA=>NEW_MATRIX_HEAD_DATA( ELEMENT = LR_CHECKBOX ).
  LR_CONTAINER->ADD_CHILD( THE_CHILD = LR_CHECKBOX ).

I have create an action named "TOGGLE" under the actions tab. and did the coding in the ONACTIONTOGGLE method.

For more clarity about dynamic programming, use this blog [Dynamic Programming in Web Dynpro ABAP |http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/2915] [original link is broken] [original link is broken] [original link is broken];.

I hope it helps.

Regards

Arjun

[Former Member]

Hi,

Check ur application in debuggermode or go to the transaction ST22 and check the error analysis.

The error may be because u have not assign any action for on toggle. It may be because of any node is initialized and using it....