Upload an excel file input into an itab,display in ALV using ABAP objects

Question

Requirement:
Create a selection screen which takes an excel file as input with parameters emp id, emp name, salary, mnth, ph no.
Create a database table with the same fields.
The program needs to have two modes. Display mode and update mode.
Display mode only displays the file data in alv grid and update mode updates database table with similar parameters as above and also shows alv grid output.
task is to do using Object oriented approach. This should also have the facility to modify the cell values in ALV grid and once saved then it needs to update the database accordingly.
I have done the same functionality in a report program without using ABAP objects but finding difficulty in using object oriented approach.Please help me as i am new to abap-objects.
Thanks in advance.......

Answer 1

Hi,
The selection screen design and all remains the same.
Get all the detials which you need in your final internal table.
This internal table will be used to display in the ALV grid.
The approach remains the same as the normal programing.
Prepare a field catalog table and then use it along with the internal table to display in the grid.
The only change is that instead of FM you will have to make us of classes and their methods.
Firstly you will have to create a screen.
On this screen create a custom control object and give it some name. say for eg. CC_CONTAINER.
This will be a container on which the ALV grid object will be placed.
2 objects are needed to display the grid
CL_GUI_CUSTOM_CONTAINER and CL_GUI_ALV_GRID.
In the PBO of the screen first create an instance of object CL_GUI_CUSTOM_CONTAINER
CREATE OBJECT y_lobj_cont
      EXPORTING
         container_name              = 'CC_CONTAINER'
      EXCEPTIONS
        cntl_error                  = 1
        cntl_system_error           = 2
        create_error                = 3
        lifetime_error              = 4
        lifetime_dynpro_dynpro_link = 5
        OTHERS                      = 6.
    IF sy-subrc NE 0.
      MESSAGE ID sy-msgid TYPE y_k_s NUMBER sy-msgno
               WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    ENDIF.
Then create a instance of the GRID
IF y_lobj_grid IS INITIAL.
      CREATE OBJECT y_lobj_grid
        EXPORTING
          i_parent          = y_lobj_cont
         EXCEPTIONS
           error_cntl_create = 1
           error_cntl_init   = 2
           error_cntl_link   = 3
           error_dp_create   = 4
           OTHERS            = 5 .
      IF sy-subrc NE 0.
        MESSAGE ID sy-msgid TYPE y_k_s NUMBER sy-msgno
                   WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
      ENDIF.
    ENDIF.
Then call the method SET_TABLE_FOR_FIRST_DISPLAY to display the grid.
CALL METHOD y_lobj_grid->set_table_for_first_display
      EXPORTING
        it_toolbar_excluding          = y_v_lt_exclude
      CHANGING
        it_outtab                     = y_li_tbl
        it_fieldcatalog               = y_li_fcat
      EXCEPTIONS
        invalid_parameter_combination = 1
        program_error                 = 2
        too_many_lines                = 3
        OTHERS                        = 4.
    IF sy-subrc NE 0.
      MESSAGE ID sy-msgid TYPE y_k_s NUMBER sy-msgno
                 WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    ENDIF.
Check the example program BCALV_GRID_EDIT for better understanding.
Regards,
Ankur Parab