How to Create ALV Grid Table in SAP ABAP OO: A Comprehensive Guide

ALV (ABAP List Viewer) is a powerful tool in SAP ABAP OO (Object-Oriented Programming) that allows you to display data in a table format. In this comprehensive guide, we'll show you how to create an ALV grid table in SAP ABAP OO, step-by-step. By the end of this article, you'll have a solid understanding of how to use ALV grid tables to display data in a user-friendly way.

Prerequisites

Before we begin, it's important to note that you should have a basic understanding of SAP ABAP OO programming. Additionally, you should have access to a SAP system with the necessary development authorizations.

Step 1: Create a Class

The first step in creating an ALV grid table is to create a new class. To do this, follow these steps:

1. Open the ABAP Workbench and navigate to the "Class Builder" (SE24).
2. Create a new class by clicking on the "Create" button and selecting "Class".
3. Enter a name for your class and click "Create".

Step 2: Define the Attributes

The next step is to define the attributes for your class. For an ALV grid table, you'll need to define an internal table to hold the data. To do this, follow these steps:

1. Navigate to the "Attributes" tab in your class.
2. Create a new attribute by clicking on the "New Entries" button.
3. Enter a name for your attribute (e.g. "lt_data") and select "Internal Table" as the data type.
4. Define the structure of the internal table to match the data you want to display.

Step 3: Create a Method to Fill the Internal Table

Once you have defined the attributes for your class, you'll need to create a method to fill the internal table with data. To do this, follow these steps:

1. Navigate to the "Methods" tab in your class.
2. Create a new method by clicking on the "New Entries" button.
3. Enter a name for your method (e.g. "fill_data") and select "Public" as the visibility.
4. Define the parameters for your method, if necessary.
5. Write the code to fill the internal table with data.

Step 4: Create a Method to Display the ALV Grid Table

The final step is to create a method to display the ALV grid table. To do this, follow these steps:

1. Create a new method by clicking on the "New Entries" button.
2. Enter a name for your method (e.g. "display_alv") and select "Public" as the visibility.
3. Define the parameters for your method, if necessary.
4. Write the code to display the ALV grid table. Here's an example:

DATA: lt_fields TYPE abap_compdescr_tab,
       gr_alv     TYPE REF TO cl_salv_table.

* Fill the internal table with data
fill_data( ).

* Create the ALV grid table
CREATE OBJECT gr_alv
  EXPORTING
    i_parent = cl_gui_container–screen0.

* Set the fields for the ALV grid table
LOOP AT lt_fields INTO DATA(ls_field).
  gr_alv->set_field( ls_field ).
ENDLOOP.

* Set the data for the ALV grid table
gr_alv->set_table_for_first_display(
  DATA(lt_table) = lt_data
  DATA(lt_lines) = VALUE #( BASE lt_data[ 1:1000 ] )
).

In this article, we've shown you how to create an ALV grid table in SAP ABAP OO. By following the steps outlined in this guide, you'll be able to create your own ALV grid tables and display data in a user-friendly way. Remember, the key to success is to take it one step at a time and test your code thoroughly before deploying it to a production environment.

References