ALV OO and refreshing the ALV grid

Hi,
i have some problems with my ALV 00 program.
On screen 1 i have to fill in a material number.
For that material i'm getting some data and show in screen 2 in a ALV grid.
Via BACK-button i'm getting back to screen 1 and can fill in another material number.
But the 2nd (and 3rd, etc) time i fill a material, the ALV grid data from material 1 is shown. Even if the internal table I_ALV where the data is, is changed.
What should i do ?
I have initialized the customer container and the grid, but that didn't solved the problem.
regards,
Hans

Hi,
Try clearing and refreshing the alv grid data table in screen 2.
Check with this code. this code is working fine. If we go back and change the input, it is showing the output corresponding to the second input only.
Have you use this method?
<b> GR_ALVGRID->REFRESH_TABLE_DISPLAY</b>
TYPE-POOLS : SLIS.
* Tables                                                              *
TABLES:
VBRK,
VBRP.
* Parameters and select options OR SELECTION SCREEN
SELECTION-SCREEN BEGIN OF BLOCK B1 WITH FRAME TITLE TEXT-001.
SELECT-OPTIONS:
            S_VBELN FOR VBRK-VBELN.
SELECTION-SCREEN END OF BLOCK B1.
* Internal Tables                                                     *
* work areas
DATA: BEGIN OF IT_VBRP OCCURS 0,
       VBELN LIKE VBRK-VBELN,
       POSNR LIKE VBRP-POSNR,
       UEPOS LIKE VBRP-UEPOS,
       FKIMG LIKE VBRP-FKIMG,
       NETWR LIKE VBRP-NETWR,
       MEINS LIKE VBRP-MEINS.
DATA : END OF IT_VBRP.
* Variables                                                           *
DATA : GR_ALVGRID TYPE REF TO CL_GUI_ALV_GRID,
       GC_CUSTOM_CONTROL_NAME TYPE SCRFNAME VALUE 'CC_ALV',
       GR_CCONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER,
       GT_FIELDCAT TYPE LVC_T_FCAT,
       GS_LAYOUT TYPE LVC_S_LAYO,
       V_FLAG VALUE 'X'.
* Start of Program                                                    *
*       INITIALIZATION.                                               *
INITIALIZATION.
S_VBELN-LOW = 1.
S_VBELN-HIGH = 1000000000.
S_VBELN-OPTION = 'EQ'.
S_VBELN-SIGN = 'I'.
APPEND S_VBELN.
*       SELECTION-SCREEN                                              *
AT SELECTION-SCREEN.
PERFORM VALIDATION.
*       START-OF-SELECTION                                            *
START-OF-SELECTION.
PERFORM GET_DATA.
CALL SCREEN 0100.
*       END-OF-SELECTION                                              *
END-OF-SELECTION.
*       TOP-OF-PAGE                                                   *
TOP-OF-PAGE.
*       END-OF-PAGE                                                   *
END-OF-PAGE.
*       AT USER-COMMAND                                               *
*&      Form VALIDATION
*       text
* --> p1        text
* <-- p2        text
FORM VALIDATION .
SELECT SINGLE VBELN
FROM VBRK
INTO VBRK-VBELN
WHERE VBELN IN S_VBELN.
IF SY-SUBRC <> 0.
    MESSAGE E000 WITH 'no billing documents found'.
ENDIF.
ENDFORM.                    " VALIDATION
*&      Form GET_DATA
*       text
* --> p1        text
* <-- p2        text
FORM GET_DATA .
SELECT VBELN
         POSNR
         UEPOS
         FKIMG
         NETWR
         MEINS
FROM VBRP
INTO TABLE IT_VBRP
WHERE VBELN IN S_VBELN.
ENDFORM.                    " GET_DATA
*&      Module DISPLAY_ALV OUTPUT
*       text
MODULE DISPLAY_ALV OUTPUT.
IF V_FLAG = 'X'.
    PERFORM DISPLAY_ALV.
    PERFORM PREPARE_FIELD_CATALOG CHANGING GT_FIELDCAT.
    PERFORM PREPARE_LAYOUT CHANGING GS_LAYOUT.
   CALL METHOD GR_ALVGRID->SET_TABLE_FOR_FIRST_DISPLAY
        EXPORTING
*      I_BUFFER_ACTIVE               =
*      I_BYPASSING_BUFFER            =
*      I_CONSISTENCY_CHECK           =
*      I_STRUCTURE_NAME              = 'VBRP'
*      IS_VARIANT                    =
*      I_SAVE                        =
*      I_DEFAULT                     = 'X'
          IS_LAYOUT                     = GS_LAYOUT
*      IS_PRINT                      =
*      IT_SPECIAL_GROUPS             =
*      IT_TOOLBAR_EXCLUDING          =
*      IT_HYPERLINK                  =
*      IT_ALV_GRAPHICS               =
*      IT_EXCEPT_QINFO               =
        CHANGING
          IT_OUTTAB                     = IT_VBRP[]
          IT_FIELDCATALOG               = GT_FIELDCAT
*      IT_SORT                       =
*      IT_FILTER                     =
        EXCEPTIONS
          INVALID_PARAMETER_COMBINATION = 1
          PROGRAM_ERROR                 = 2
          TOO_MANY_LINES                = 3
          OTHERS                        = 4
    IF SY-SUBRC <> 0.
      MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
                 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      CALL METHOD GR_ALVGRID->SET_READY_FOR_INPUT
        EXPORTING
          I_READY_FOR_INPUT = 1.
    ELSE.
      <b>CALL METHOD GR_ALVGRID->REFRESH_TABLE_DISPLAY
*    EXPORTING
*      IS_STABLE      =
*      I_SOFT_REFRESH =
        EXCEPTIONS
          FINISHED       = 1
          OTHERS         = 2
      IF SY-SUBRC <> 0.
        MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
                   WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
      ENDIF.</b>
    ENDIF.
    CLEAR V_FLAG.
ENDIF.
ENDMODULE.                 " DISPLAY_ALV OUTPUT
*&      Form DISPLAY_ALV
*       text
* --> p1        text
* <-- p2        text
FORM DISPLAY_ALV .
IF GR_ALVGRID IS INITIAL.
    CREATE OBJECT GR_ALVGRID
      EXPORTING
*    I_SHELLSTYLE      = 0
*    I_LIFETIME        =
        I_PARENT          = GR_CCONTAINER
*    I_APPL_EVENTS     = space
*    I_PARENTDBG       =
*    I_APPLOGPARENT    =
*    I_GRAPHICSPARENT =
*    I_NAME            =
      EXCEPTIONS
        ERROR_CNTL_CREATE = 1
        ERROR_CNTL_INIT   = 2
        ERROR_CNTL_LINK   = 3
        ERROR_DP_CREATE   = 4
        OTHERS            = 5
    IF SY-SUBRC <> 0.
      MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
                 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
    ENDIF.
ENDIF.
ENDFORM.                    " DISPLAY_ALV
*&      Form PREPARE_FIELD_CATALOG
*       text
*      <--P_GT_FIELDCAT text
FORM PREPARE_FIELD_CATALOG CHANGING P_GT_FIELDCAT TYPE LVC_T_FCAT.
DATA : LS_FCAT TYPE LVC_S_FCAT,
         L_POS TYPE I.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'VBELN'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Billing Document'.
LS_FCAT-OUTPUTLEN = '10'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'POSNR'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Billing Item'.
LS_FCAT-OUTPUTLEN = '6'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'UEPOS'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Higher Level Item'.
LS_FCAT-OUTPUTLEN = '6'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'FKIMG'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Invoice Quantity'.
LS_FCAT-OUTPUTLEN = '13'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'NETWR'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Net Value'.
LS_FCAT-OUTPUTLEN = '15'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
LS_FCAT-FIELDNAME = 'MEINS'.
LS_FCAT-TABNAME = 'IT_VBRP'.
LS_FCAT-COL_POS = L_POS.
LS_FCAT-SCRTEXT_M = 'Unit of Measure'.
LS_FCAT-OUTPUTLEN = '3'.
APPEND LS_FCAT TO P_GT_FIELDCAT.
CLEAR LS_FCAT.
L_POS = L_POS + 1.
ENDFORM.                    " PREPARE_FIELD_CATALOG
*&      Form PREPARE_LAYOUT
*       text
*      <--P_GS_LAYOUT text
FORM PREPARE_LAYOUT CHANGING P_GS_LAYOUT TYPE LVC_S_LAYO.
P_GS_LAYOUT-ZEBRA = 'X'.
P_GS_LAYOUT-GRID_TITLE = 'INVOICE DETAILS'.
P_GS_LAYOUT-SMALLTITLE = 'X'.
P_GS_LAYOUT-EDIT = 'X'.
ENDFORM.                    " PREPARE_LAYOUT
*&      Module STATUS_0100 OUTPUT
*       text
MODULE STATUS_0100 OUTPUT.
SET PF-STATUS 'CANCEL'.
* SET TITLEBAR 'xxx'.
ENDMODULE.                 " STATUS_0100 OUTPUT
*&      Module USER_COMMAND_0100 INPUT
*       text
MODULE USER_COMMAND_0100 INPUT.
CASE SY-UCOMM.
    WHEN 'BACK'.
      LEAVE TO SCREEN 0.
    WHEN 'CANCEL'.
      LEAVE TO SCREEN 0.
    WHEN 'EXIT'.
      CALL TRANSACTION 'SE38'.
    WHEN 'CHANGE'.
      IF GR_ALVGRID->IS_READY_FOR_INPUT( ) = 0.
        CALL METHOD GR_ALVGRID->SET_READY_FOR_INPUT
          EXPORTING
            I_READY_FOR_INPUT = 1.
      ELSE.
        CALL METHOD GR_ALVGRID->SET_READY_FOR_INPUT
          EXPORTING
            I_READY_FOR_INPUT = 0.
      ENDIF.
ENDCASE.
Regards,
Aswin

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http://www.apple.com/safari/download/

URL encoded and refreshing the current page

Hello, I am redirecting to a page using response.sendRedirect(encodedPage). In the page which I redirect to, I have some code that checks if certain session variables are set. Upon redirection, all the session variables are set. However, if I hit the refresh button on my browser, the session check code tells me the variables are no longer set. Is this supposed to happen?
Any help would be appreciated.
jason

My suggestion probably has nothing to do with the
problem, but when you encode the URL for your
sendRedirect() call, are you using encodeURL()?
Because you should be using
encodeRedirectURL().
I am using encodeRedirectURL :) .... thanks for the suggestion though.

ALV OO and refreshing the ALV grid

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