SAP TECH: Local Class : Passing parameters ( Select-Options and Internal table ) to methods

Steps

Go to Transaction Code SE38.

Enter the program name start's with Y or Z<program name > and click on Create Button.

Enter the Title.
Select the Attribute Type as : Executable Program.
Click on SAVE button.

Creating custom select-options

Go to transaction code SE11.

Click on Data Type radio button.
Enter the standard SELECT-OPTIONS structure name i.e RSDSELOPT.

Click on Copy .

Pop-up will appear.

Customize select-options name and click on continue.

Assign the package name , either Local package or Package.

Check the status bar.

Click on Change button.

Pop-up will appear.

Click on "Main,in Orginal Lang" .

Structure looks like,

Choose the Component Type for LOW and HIGH as per requirements and press ENTER.

Save -> Check -> Activate.

Copy the structure name.
Go back to SE38.

Source Code

CLASS C1 DEFINITION.

  PUBLIC SECTION.

  METHODS : FETCH_DATA IMPORTING IM_MATNR TYPE  ZSEL
                       CHANGING  CH_ITAB TYPE MAKT_ITAB,
            DISPLAY IMPORTING IM_ITAB TYPE MAKT_ITAB.

  PROTECTED SECTION.

  PRIVATE SECTION.

ENDCLASS.

CLASS C1 IMPLEMENTATION.

  METHOD FETCH_DATA.
    SELECT * FROM MAKT INTO TABLE CH_ITAB WHERE MATNR BETWEEN
IM_MATNR-LOW AND IM_MATNR-HIGH.

  ENDMETHOD.

  METHOD DISPLAY.
    DATA : WA_MAKT TYPE MAKT.

    LOOP AT IM_ITAB INTO WA_MAKT.

    WRITE : / WA_MAKT-MATNR ,WA_MAKT-SPRAS , WA_MAKT-MAKTX.
    ENDLOOP.

  ENDMETHOD.

ENDCLASS.

TABLES : MAKT.
DATA : OBJ TYPE REF TO C1.

DATA : IT_MAKT TYPE TABLE OF MAKT.

SELECT-OPTIONS : S_MATNR FOR MAKT-MATNR.

START-OF-SELECTION.

CREATE OBJECT OBJ.

CALL METHOD OBJ->FETCH_DATA
EXPORTING
  IM_MATNR = S_MATNR
CHANGING
  CH_ITAB  = IT_MAKT .

CALL METHOD OBJ->DISPLAY
EXPORTING
  IM_ITAB = IT_MAKT.