Single selection in table control

Question

hii all..
I am stuck at a very unique problem. i have created a table control to display some data. from that control user can select only a single row. So for that i have set the table control attribute single row selection. Now the problem is suppose i have 50 rows in my internal table that is showing in table control. In the table control 25 rows are displayed at a time. When user presses Page down the next 25 rows are displayed.
Now when table control is showing first set of 25 rows, a user is able to select only a single row according to the attribute that i have set. But when a user selects any row in the first 25 rows and presses Page down and then selects another row in the next set of 25 rows, both the previous selection and the current selection are retained which i didnt wanted.
How can i solve this problem.... really got stuck
points guranteed!!

Answer 1

Hi,
In every PAI count the no. of selected records and in every PBO if the count is greater than one, then give the information message and unselect all those selected rows.
<u>Example</u>:
CONTROLS flights TYPE TABLEVIEW USING SCREEN 100.
DATA: count type i.
MODULE status_0100 OUTPUT.
  SET PF-STATUS 'SCREEN_100'.
  if count > 1.
    count = 0.
    message 'You can select only a single Record' type 'I' .
    loop at itab into wa.
      wa-mark = ' '.
      modify itab from wa.
    endloop.
  endif.
ENDMODULE.
MODULE count_selected_rows INPUT.
    loop at itab into wa.
      if wa-mark = 'X'.
        count = count + 1.
      endif.
    endloop.
ENDMODULE.                 " count_selected_rows  INPUT\
<b>Screen FlowLogic</b>
PROCESS BEFORE OUTPUT.
  MODULE STATUS_0100.
    LOOP AT ITAB INTO DEMO_CONN WITH CONTROL FLIGHTS.
  ENDLOOP.
PROCESS AFTER INPUT.
  MODULE CANCEL AT EXIT-COMMAND.
  LOOP AT ITAB.
    module read_table_control.
  ENDLOOP.
    module count_selected_rows.
  module user_command_0100.
<b>Reward if useful,</b>Regards,
Sudheer