alv using OO

[Former Member]

Hi,

I'm trying out ALV using OO approach. Im building a very basic alv, However the alv is not displaying anything. Can any one tell me where is the bug ?

Here is my code

REPORT ztest.

TYPES:BEGIN OF REC,

A(30),

END OF REC.

*--- ALV Grid instance reference

DATA gr_alvgrid TYPE REF TO cl_gui_alv_grid .

*--- Name of the custom control added on the screen

DATA gc_custom_control_name TYPE scrfname." VALUE u2018cc_alvu2019 .

*--- Custom container instance reference

DATA gr_ccontainer TYPE REF TO cl_gui_custom_container .

*--- Field catalog table

DATA gt_fieldcat TYPE lvc_t_fcat .

*--- Layout structure

DATA gs_layout TYPE lvc_s_layo .

DATA: int_tab TYPE STANDARD TABLE OF rec WITH HEADER LINE.

BREAK-POINT.

PERFORM populate_data.

IF gr_ccontainer IS INITIAL.

CREATE OBJECT gr_ccontainer

EXPORTING

container_name = 'CC_ALV'

EXCEPTIONS

cntl_error = 1

cntl_system_error = 2

create_error = 3

lifetime_error = 4

lifetime_dynpro_dynpro_link = 5

OTHERS = 6.

CREATE OBJECT gr_alvgrid

EXPORTING

i_parent = gr_ccontainer

EXCEPTIONS

error_cntl_create = 1

error_cntl_init = 2

error_cntl_link = 3

error_dp_create = 4

OTHERS = 5.

CALL METHOD gr_alvgrid->set_table_for_first_display

• EXPORTING

• I_STRUCTURE_NAME = 'REC'

• is_layout = gs_layout

CHANGING

it_outtab = int_tab[]

it_fieldcatalog = gt_fieldcat[]

EXCEPTIONS

invalid_parameter_combination = 1

program_error = 2

too_many_lines = 3

OTHERS = 4 .

SY-SUBRC = SY-SUBRC.

ELSE.

CALL METHOD gr_alvgrid->refresh_table_display

EXCEPTIONS

finished = 1

OTHERS = 2 .

SY-SUBRC = SY-SUBRC.

ENDIF.

&----

---

*& Form populate_data

&----

---

• text

----

---

FORM populate_data.

DATA ls_fcat TYPE lvc_s_fcat .

INT_TAB-A = 'HI'.

APPEND INT_TAB.

INT_TAB-A = 'HELLO'.

APPEND INT_TAB.

ls_fcat-tabname = 'INT_TAB'.

ls_fcat-fieldname = 'A' .

LS_FCAT-COL_POS = 1.

ls_fcat-inttype = 'C' .

ls_fcat-outputlen = '30' .

ls_fcat-coltext = 'test' .

ls_fcat-seltext = 'TEST' .

APPEND ls_fcat TO gt_fieldcat .

clear ls_fcat.

ENDFORM. "populate_data

[abdul_hakim]

Hi,

You are not calling the screen in your program where you have placed your custom container. Hence it is displaying nothing.

Also the place where you are instanciating the objects is not correct.

Jus check the program BCALV_GRID_02 for correctly creating a list using OO approach.

Cheers,

Hakim

[Former Member]

thanks.....it worked.