![\"SAP\"](\"http:\/\/oprsteny.cz\/wp-content\/uploads\/SAP.jpg\")
In this article I’ll show you how to create a combo box as one of selection-screen parameters\nI personally like OO ABAP, therefore I’ll use a helper class which will implement a method returning pairs of key-value for our combo box.<\/p>\n
In this article I’ll show you how to create a combo box as one of selection-screen parameters
\nI personally like OO ABAP, therefore I’ll use a helper class which will implement a method returning pairs of key-value for our combo box.<\/p>\n
CLASS lcl_helper DEFINITION.\r\n PUBLIC SECTION.\r\n CLASS-METHODS:\r\n get_combo_items RETURNING VALUE(rt_cbx_items) TYPE vrm_values.\r\nENDCLASS.<\/pre>\n…and it’s implementation<\/p>\n
CLASS lcl_helper IMPLEMENTATION.\r\n METHOD get_combo_items.\r\n FIELD-SYMBOLS:\r\n <ls_vrm> LIKE LINE OF rt_cbx_items.\r\n\r\n APPEND INITIAL LINE TO rt_cbx_items ASSIGNING <ls_vrm>.\r\n <ls_vrm>-key = 'A'.\r\n <ls_vrm>-text = 'First Option'.\r\n\r\n APPEND INITIAL LINE TO rt_cbx_items ASSIGNING <ls_vrm>.\r\n <ls_vrm>-key = 'B'.\r\n <ls_vrm>-text = 'Second Option'.\r\n\r\n APPEND INITIAL LINE TO rt_cbx_items ASSIGNING <ls_vrm>.\r\n <ls_vrm>-key = 'C'.\r\n <ls_vrm>-text = 'Third Option'.\r\n ENDMETHOD.\r\nENDCLASS.<\/pre>\nNow let’s define the selection screen:<\/p>\n
SELECTION-SCREEN BEGIN OF BLOCK b01.\r\n PARAMETERS:\r\n p_combo AS LISTBOX VISIBLE LENGTH 15 OBLIGATORY.\r\nSELECTION-SCREEN END OF BLOCK b01.<\/pre>\nWe have to fill the combo box with values – this will be done in the INITIALIZATION<\/em> part of processing.<\/p>\nINITIALIZATION.\r\n CALL FUNCTION 'VRM_SET_VALUES'\r\n EXPORTING\r\n id = 'P_COMBO'\r\n values = lcl_helper=>get_combo_items( )\r\n EXCEPTIONS\r\n id_illegal_name = 1\r\n OTHERS = 2.\r\n\r\n* We pre-select the second option\r\n p_combo = 'B'.<\/pre>\n
![\"ComboBox](\"http:\/\/oprsteny.cz\/wp-content\/uploads\/COMBOBOX_SELECTIONSCREEN.png\")
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