• It’s an ABAP OO class that displays data in a grid (table-like format) inside a screen container.

• Unlike the simpler CL_SALV_TABLE, this grid is fully interactive and customizable.

Main Features

1. Editable cells → You can let users change data directly in the grid.

2. Field catalog → You define which columns to show, their titles, and if they’re editable.

3. Layout control → Zebra patterns, column widths, key columns, hotspots, etc.

4. Events → You can react to user actions (e.g., double-click, toolbar buttons, cell value changes).

5. Container-based → You need a custom control on a dynpro (screen) to host the ALV Grid.

How it Works (Step-by-Step Flow)

1. Create a Screen (Dynpro)

   • Add a Custom Control (like a placeholder on the screen).

   • Give it a name, e.g., CC_ALV.

2. Create Container

   • In your program, create an object of class CL_GUI_CUSTOM_CONTAINER linked to CC_ALV.

   • This is the “holder” where the ALV will appear.

3. Create ALV Grid

   • Instantiate CL_GUI_ALV_GRID using the container as its parent.

4. Build Field Catalog

   • Define column properties (FIELDNAME, SELTEXT_M, EDIT, etc.).

   • Each entry describes how a column is shown in the ALV grid.

5. Pass Data to ALV

   • Call method set_table_for_first_display with your internal table (IT_OUTTAB) and the field catalog.

6. Display Grid

   • The ALV Grid now shows inside the screen.

   • Users can scroll, filter, sort, and (if allowed) edit data.

Steps to Implement CL_GUI_ALV_GRID

1. Create a Screen (e.g., Screen 100)

• Go to SE80 → your program → create a screen (No. 100).

• On the screen, draw a Custom Control (name it CC_ALV).

• Add a GUI status (with functions BACK, EXIT, CANCEL).

REPORT z_alv_grid_editable.

************************************************************************
* TYPES & DATA DECLARATIONS
************************************************************************
TYPES: BEGIN OF ty_spfli,
carrid TYPE spfli-carrid,
connid TYPE spfli-connid,
cityfrom TYPE spfli-cityfrom,
cityto TYPE spfli-cityto,
END OF ty_spfli.

DATA: gt_spfli TYPE TABLE OF ty_spfli,
gs_spfli TYPE ty_spfli.

” ALV references
DATA: go_container TYPE REF TO cl_gui_custom_container,
go_alv TYPE REF TO cl_gui_alv_grid.

” Field catalog & layout
DATA: gt_fieldcat TYPE lvc_t_fcat,
gs_fieldcat TYPE lvc_s_fcat,
gs_layout TYPE lvc_s_layo.

************************************************************************
* START-OF-SELECTION
************************************************************************
START-OF-SELECTION.
” Fetch some demo data
SELECT carrid connid cityfrom cityto
FROM spfli
INTO TABLE gt_spfli.

” Call ALV screen
CALL SCREEN 100.

************************************************************************
* MODULES FOR SCREEN 100
************************************************************************
MODULE status_0100 OUTPUT.
SET PF-STATUS ‘MAIN’. ” Create a status MAIN in GUI status

IF go_container IS INITIAL.
” Create container linked to CC_ALV on screen
CREATE OBJECT go_container
EXPORTING container_name = ‘CC_ALV’.

” Create ALV Grid object
CREATE OBJECT go_alv
EXPORTING i_parent = go_container.

” Layout options
gs_layout-zebra = abap_true. ” striped display

” Build field catalog
CLEAR gs_fieldcat.
gs_fieldcat-fieldname = ‘CARRID’.
gs_fieldcat-seltext_m = ‘Carrier ID’.
gs_fieldcat-edit = abap_true. ” Editable
APPEND gs_fieldcat TO gt_fieldcat.

CLEAR gs_fieldcat.
gs_fieldcat-fieldname = ‘CONNID’.
gs_fieldcat-seltext_m = ‘Connection ID’.
gs_fieldcat-edit = abap_true. ” Editable
APPEND gs_fieldcat TO gt_fieldcat.

CLEAR gs_fieldcat.
gs_fieldcat-fieldname = ‘CITYFROM’.
gs_fieldcat-seltext_m = ‘From City’.
gs_fieldcat-edit = abap_true. ” Editable
APPEND gs_fieldcat TO gt_fieldcat.

CLEAR gs_fieldcat.
gs_fieldcat-fieldname = ‘CITYTO’.
gs_fieldcat-seltext_m = ‘To City’.
gs_fieldcat-edit = abap_true. ” Editable
APPEND gs_fieldcat TO gt_fieldcat.

” Display data in ALV
CALL METHOD go_alv->set_table_for_first_display
EXPORTING
is_layout = gs_layout
CHANGING
it_fieldcatalog = gt_fieldcat
it_outtab = gt_spfli.
ENDIF.
ENDMODULE.

************************************************************************
* Handle user commands
************************************************************************
MODULE user_command_0100 INPUT.
CASE sy-ucomm.
WHEN ‘BACK’ OR ‘EXIT’ OR ‘CANCEL’.
LEAVE PROGRAM.
ENDCASE.
ENDMODULE.