ALV selection screen

Question

Hi,
Iam new to A.L.V and have few queries.please tell me the coding for the below.
At selection screen:
Process the following validations for selection screen fields and display the appropriate error messages.
1.     Validate  the Date From (SAP Transaction Date ) against VEKP –Created-On Date .
2.     Validate  the Date From (SAP Transaction Date ) against VEKP –Created-On Date .
3.     Validate the Plant From (Transaction Source Location ) against VEKP – Shipping Point.
4.     Validate the Plant To (Transaction Destination Location ) against VEKP – Shipping Point.
5.     Validate the Pallet ID against VEKP – Handling Unit.
6.      If Date From field is blank, display an appropriate error message.
7.     If Plant From field is blank, display an appropriate error message.
Kindly send me the coding for this.
Regards,
Tanya

Answer 1

Hi,
the code is  :
*For VEKP-Created-on-date :
AT SELECTION-SCREEN ON s_erdat.
  IF NOT s_erdat[] IS INITIAL.
    SELECT erdat FROM VEKP    INTO VEKP-ERDAT
                  WHERE ERDAT IN s_erdat.
    ENDSELECT.
    IF sy-subrc <> 0.
      MESSAGE 'Enter a valid created date' Type E.
    ENDIF.
Else ( for question 6& 7)
MESSAGE 'Enter a date in the Date From field' Type E.
  ENDIF.
from 1 to 2, the above was the code.. and from 3 to 5 - the else paart is not requried..