table view modify

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Hai guys,

I want to modify the table values in tableview.But my modify operation not working.Could u guys help me.

Layout

<htmlb:tableView id = "tv1"

headerVisible = "true"

footerVisible = "false"

design = "ALTERNATING"

visibleRowCount = "5"

onRowSelection = "MyEventRowSelection"

selectionMode = "LINEEDIT"

table = "<%= itab %>" >

</htmlb:tableView>

<htmlb:button id = "button1"

design = "emphasized"

text = "Update"

onClick = "myClickHandler"

/>

oninput processing

DATA: tv TYPE REF TO CL_HTMLB_TABLEVIEW,

ind type i,

wa type yprojects.

DATA: event TYPE REF TO CL_HTMLB_EVENT.

event = CL_HTMLB_MANAGER=>get_event( runtime->server->request ).

IF event->name = 'button1' AND event->event_type = 'click'.

DATA: button_event TYPE REF TO CL_HTMLB_EVENT_BUTTON.

button_event ?= event.

tv ?= CL_HTMLB_MANAGER=>GET_DATA(

request = runtime->server->request

name = 'tableView'

id = 'tv2' ).

IF tv IS NOT INITIAL.

DATA: tv_data TYPE REF TO CL_HTMLB_EVENT_TABLEVIEW.

tv_data = tv->data.

ind = tv_data->selectedrowindex.

IF ind IS NOT INITIAL.

READ TABLE itab INDEX ind into wa.

modify yprojects from wa .

endif.

ENDIF.