Set_Block_Property invoke has caused the earlier enter value get disappear

Question

Hi all,
I got a simple field which set to let user to enter a value and from the entered value user will need to press the button to search for the next display value. I have set when_button_pressed with set_block_property
go_block('ot_mat_iss_head');
Set_Block_Property('OT_MAT_ISS_HEAD', default_WHERE, 'MIH_NO = '''|| :OT_MAT_ISS_HEAD.MIH_NO1 ||''' ');
go_block('OT_MAT_ISS_HEAD');
execute_query;
the above query work fine where I got the next field display with value that what I want. However, the first column that ask user to enter the value was get disappeared. How come ? How to get it display in this case ?
Thanks.
Regards,
Lim

Answer 1

The first column where I ask user to enter value was in the same block with the second column that display the value. Immediately, the second value get display the first value get disappeared after press on the button.This is expected. Because your non-base table item is part of the block you are querying, when you call EXECUTE_QUERY, it clears the block (including any non-base table items) and queries the selected record.
If you want the search value to continue to be displayed in your non-base table item, then move the non-base table item to a Control block (non-base table block). Then the EXECUTE_QUERY will not affect the value of the item.
OT_MAT_ISS_HEAD.MIH_NO1 is a non db field. If I changed to DB field when I execute the button, system will prompt to ask me whether want to save my record.Again, this is expected because Forms recognizes that you have changed a record displayed in your table. Therefore, Forms will ask you if you want to save your changes. If you want to continue to display the searched value in your non-base table item, move it to a Control block.
Craig...