Dynamically changing the content of the block

Hi,
We have a requirement as below :
The form contains two blocks. The main block contains a dropdown which will show a list of tables (like emp, dept..etc). When the user will select a particular table, the second block should show the columns of that particular table.
Please help me.
Thanks,
Tandra

Hi Francois,
Thanks for the response.
I searched "Steve Cosner post about dynamic form" and found a reply from Chirag Patel as below :
IF you have one block and 100 items. then
you can change at run time everyhting to bring data from un known table
you can change block property "QUERY DATASOURCE NAME" , "WHERE clause", "Order by" also
and also you can change item property "Column Name" at runtime
in control block you can populate list item with all tables then
write following code on when-list-changed trigger
clear_block;
1) make visible off if any item is visible.
2) then change all block property which i mentioned above.
3) then fetch all column from all_tab_columns and change clolumn name property and disply those items in that block.
execute_query;
and i think if you use form built-in packges then you can also bring data for BLOB and Long dynamically !!!
However i am not clear about the third point.
Could you please explain this in detail?
Thanks,
Tandra

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Dynamically change the contents of one combo box based on the other

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I have a question which might have a possibly simple answer. Well anyway help me out since i could not find the simple answer.
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One way is through event handlers.
taking your example as a model when user selects a country you could fire an action with a flag set to ture. A method will return the states from the DB or your temporary files or what ever and then the true flag will be used in the states combo box rendering.
other way: javascript
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DATA : BEGIN OF itab1 OCCURS 0,
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DATA : BEGIN OF it_itab1 OCCURS 0.
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DATA : END OF it_itab1.
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DATA : w_total   LIKE glt0-hslvt,
       w_count   LIKE glt0-bukrs,
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       lv_count TYPE i.
      w_slash   TYPE c VALUE ' '.
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SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE tit1.
SELECT-OPTIONS : s_bukrs FOR glt0-bukrs OBLIGATORY,
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INITIALIZATION.
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ENDIF.
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          AND   bukrs   IN s_bukrs
          AND   ryear   IN s_ryear
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            itab-co_1200 = w_total.
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SORT itab BY racct.
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*&      Form display_alv_report
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gd_repid = sy-repid.
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    EXCEPTIONS
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*&      Form field_cat1
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i_fieldcat-fieldname   = 'RACCT'.
i_fieldcat-seltext_m    = 'Account'(001).
i_fieldcat-fix_column = 'X'.
i_fieldcat-emphasize   = 'X'.
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CLEAR i_fieldcat.
i_fieldcat-col_pos     = 1.
i_fieldcat-fieldname   = 'TXT20'.
i_fieldcat-seltext_m    = 'Description'(002).
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FORM field_cat USING xv_burks TYPE char4.
lv_count = lv_count + 1.
i_fieldcat-col_pos     = lv_count.
CONCATENATE 'CO_' xv_burks INTO i_fieldcat-fieldname.
i_fieldcat-seltext_m    = xv_burks.
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i_fieldcat-no_zero = 'X'.
i_fieldcat-do_sum = 'X'.
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ENDFORM.   "field_cat
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user571635 wrote:
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>
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>
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Solved!
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