How can i deselect a row in the LV Grid display

[Former Member]

Hi Experts,

I'm new to webdynpro ABAP. Can anyone give me some idea on "How can i deselect a row in the LV Grid display".

My requirement is that after selecting a row in the alv display, if i click on the same row it should be De-selected.

I wrote the following code in ON_LEAD_SELECT of the ALV.

But its giving me DUMP "Access via NULL object reference" at the CALL METHOD lr_alv->REFRESH_TABLE_DISPLAY line.

DATA lr_alv TYPE REF TO CL_GUI_ALV_GRID.

DATA lv_row_num TYPE i.

DATA: lvc_s_stbl TYPE lvc_s_stbl.

DATA: lr_index TYPE REF TO if_salv_wd_table_lead_select,

lv_line type SYTABIX.

lr_index ?= r_param.

MOVE lr_index->index TO lv_line.

lvc_s_stbl-row = lv_line.

IF lr_index->OLD_INDEX = lv_line.

CALL METHOD lr_alv->REFRESH_TABLE_DISPLAY

EXPORTING

IS_STABLE = lvc_s_stbl

I_SOFT_REFRESH = abap_true

EXCEPTIONS

FINISHED = 1

others = 2.

*IF SY-SUBRC <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

*ENDIF.

ENDIF.

Canyou plz help me on this.....

[saravanan_narayanan · Accepted solution]

Hello Shravan,

reason for hte dump is LR_ALV is not initialised. but for deselecting the selected element you can write the following code

data lo_nd type REF TO if_wd_context_node.

data lv_old_index type i.

data lv_new_index type i.

lv_new_index = r_param->index.

lv_old_index = r_param->old_index.

IF lv_old_index = lv_new_index.

lo_nd = wd_context->get_child_node( 'ALV_TABLE' ). "ALV_TABLE is the name of hte context node that is passed to the ALV component

lo_nd->set_lead_selection_index( if_wd_context_node=>no_selection ).

ENDIF.

BR, Saravanan

[Former Member]

Thank u Saravanan . It solved my problem.

[former_member199125]

Hi Shravan,

If you write the code on leadselect, it will trigger when the lead of selection table changes.

If you want to deselect the selected item,

use the set_selected method with abap_false value.then it will deselect the selected record. and best to use ONCLICK event.

Regards

Srinivas