abap - 更改单选按钮时隐藏强制参数

Question

我有一些单选按钮，当我在它们之间进行更改时，一些块会出现/消失。

但是，如果我将参数设置为强制性或必需的，除非我填写它们，否则它们不会隐藏。我想让参数成为必需的，但是当我更改单选按钮选项时我需要隐藏它们。

Answer 1

估计是选择画面...

• 然后在您的屏幕上循环并检查“YOUR_RADIO_BUTTON”的值

• 启用或禁用块

  AT SELECTION-SCREEN OUTPUT.
  
    LOOP AT SCREEN.
  * Radio button parameter = P_RADIO
  *   hide the parameter named "to_hide" 
      IF P_RADIO EQ 'X' AND SCREEN-NAME CS 'TO_HIDE'.
        SCREEN-INPUT = 0.
        MODIFY SCREEN.
      ENDIF.
  
  *   display the parameter named "to_hide"
      IF P_RADIO <> 'X' AND SCREEN-NAME CS 'TO_HIDE'.
        SCREEN-INPUT = 1.
        MODIFY SCREEN.
      ENDIF.
  
    ENDLOOP.
  

Answer 2

If you use PARAMETERS ... OBLIGATORY, this is an unconditional statement - this parameter is required regardless of the other settings. If you need a conditional check, you have to code it for yourself:

PARAMETERS p_chkbuk AS CHECKBOX.
PARAMETERS p_bukrs  TYPE bukrs.

AT SELECTION-SCREEN ON p_bukrs. 
  IF p_chkbuk = abap_true AND p_bukrs IS INITIAL. 
    MESSAGE 'You need to enter something.' TYPE 'I' DISPLAY LIKE 'E'.
  ENDIF.