Filter inside Tble UI element

Question

Dear Experts,
Im having two columns in my table and im using filter in my table, In onfilter event i written the code 
wd_this->table_control->apply_filter( ).
And  in the table column i enabled the isFiltered option and i also binded the filtervalue to a variable of type string.
when i execute my program and give input in filter field the following error occurs,
The following error text was processed in the system EBP : Access via 'NULL' object reference not possible.
The error occurred on the application server kaar-server15_EBP_00 and in the work process 1 .
The termination type was: RABAX_STATE
The ABAP call stack was:
Method: ONACTIONONFILTER of program /1BCWDY/6CS8GWLR56619XU3FP87==CP
Method: IF_WDR_VIEW_DELEGATE~WD_INVOKE_EVENT_HANDLER of program /1BCWDY/6CS8GWLR56619XU3FP87==CP
Method: INVOKE_EVENTHANDLER of program CL_WDR_DELEGATING_VIEW========CP
Method: IF_WDR_ACTION~FIRE of program CL_WDR_ACTION=================CP
Method: DO_HANDLE_ACTION_EVENT of program CL_WDR_WINDOW_PHASE_MODEL=====CP
Method: PROCESS_REQUEST of program CL_WDR_WINDOW_PHASE_MODEL=====CP
Method: PROCESS_REQUEST of program CL_WDR_WINDOW=================CP
Method: EXECUTE of program CL_WDR_MAIN_TASK==============CP
Method: IF_WDR_RUNTIME~EXECUTE of program CL_WDR_MAIN_TASK==============CP
Method: HANDLE_REQUEST of program CL_WDR_CLIENT_ABSTRACT_HTTP===CP
please help me to sort out this problem
Thanks & Regards
Arun.P

Answer 1

Hi,
You must not have defined wd_this->table_control
You need to do this in WDDOMODIFY and get table control in global variable as follows:
  CHECK first_time EQ abap_true.
**Get table handler for table from view
  DATA: l_table TYPE REF TO cl_wd_table.
* Get reference of the table view element
  l_table ?= view->get_element( 'TBL_MAIN' ).
* Get reference to the Filter & Sorting API
  wd_this->table_control ?= l_table->_method_handler.
Hope this helps!
Thanks,
Tejaswini
Edited by: Tejaswini Chafekar on Aug 27, 2009 2:53 PM