Dynamic value assignment to a particular column in a vertical ALV

Hi Friends,
In the present program ALV has 44 fields and output row is only one(with some field editable).
My requirement is to change present output to vertical ALV and editable field should be available
as editable.
Now I have changed this to transposed ALV manually(not dynamically) with required fields editable.
Now there is 44 rows and two column "FIELD and "VALUE'.Some values in the second column is editable.
Previously output was like this:
field1   field2 field3 ...
val1     val2    val3   ...
Now output is like:
FIELD   VALUE
field1 value1(type INT)
field2 value2(type char5) Editable(need F4 help)
field3 value3(type date)
My present structure declaration is:
types: begin of ty_itab,
        field type char 50,
        value type char70,
        celltab type lvc_t_styl,(for editing some values in VALUE column).
       end of ty_itab.
data: itab type standard table of ty_itab.
Now the second column i have declared as CHAR70 which contains only char
values because to put all differt types of values to one single column named
'VALUE'.
But as field1 field2 field3... had differnt type of value like integer char date...I need to validate some values
(specially those which are editable) before saving to custom DB table.
So I need dynamic value assignment to VALUE column when preparing internal table for display.
What I want to say is that VALUE column should be able to contain different type of values like INT, DATE, CHAR...etc
Is the requirement is feasible?
If yes then How should I declare the structure and populate different type of values within single column 'VALUE'.
Also is it possible to have F4 helps in the second column (VALUE)???

Hi Manab,
I did something comparable: We have a very complex transaction with several subscreens with multiple fields to be filled with complex logic to create a very special contract. The requirement was to create a method to create a copy of this contract being able to apply some changes.
I created a wizard (transaction SBPT_WIZARD_BUILDER - Wizard-Builder) to accomplish that. I grouped all the fields to just 3 logical groups and thius created 3 stesp where the user gets an ALV as you describe, but we have the rows like FIELD with the new value editable. Additionally I have hidden fields with table name and field name so that I can determine the characteristics (datatype) at run time.
The value fields are just strings (every ALV field is a text field on the surface).
For editable fields, you have an event DATA_CHANGED. I used this method as a handler for the event:
(I will leave out the wizard part here - maybe a good idea for a blog to explain that)
METHOD handle_data_changed.
    CALL FUNCTION 'RS_CONV_EX_2_IN'
      EXPORTING
         input_external                     = <mod>-value
         table_field                        = ls_tabfield
I also created handlers for F1 and F4
Handler for CL_GUI_ALV_GRID->ONF1
METHOD handle_f1.
    CALL FUNCTION 'HELP_OBJECT_SHOW_FOR_FIELD'
      EXPORTING
        called_for_tab   = lv_tabname
        called_for_field = lv_fieldname
      EXCEPTIONS
        object_not_found = 1
        sapscript_error = 2
        OTHERS           = 3.
Handler for CL_GUI_ALV_GRID->HANDLE_F4
METHOD handle_f4.
CALL FUNCTION 'F4IF_FIELD_VALUE_REQUEST'
    EXPORTING
      tabname    = lv_tabname
      fieldname = lv_fieldname
    TABLES
      return_tab = lt_return_tab
    EXCEPTIONS
      OTHERS     = 5.
    er_event_data->m_event_handled = abap_true.
* if er_event_data->m_event_handled is not set to abap_true, system will handle it.
* In this context the message 'Keine Eingabehilfe verfügbar' will be displayed
ENDMETHOD.
This is just an excerpt from my project. It shows that you can do more in ALV as you knew.
I tried to post a little more but the formatting break down, possibly a result of the character limit
Regards,
Clemens

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