List of materials from the excel which are not posted

Question

I have written bdc,
that ware house storage locations should not be allowed.
All the storage locations in the table T320 are ware house storage locations.
so i have written
if not  it_data1 is initial.
SELECT *  into table iT_320 FROM  T320
  for all entries in it_data1
where WERKS = it_data1-werks and
           LGORT  = it_data1-lgort.
endif.
LOOP AT IT_DATA1 .
  read table iT_320 INTO wa_320 with key werks = it_data1-werks
                                          lgort = it_data1-lgort.
  IF sy-subrc = 0 .
    delete it_data1 index sy-tabix.
  ENDIF.
endloop.
So its working fine till then.
but i wanted a list of materials from the excel wch are not posted,so tht the user is aware tht some items are not consumed.
How to display that list in bdc.
Please give the code for that.

Answer 1

MY EXCEL DATA IS IN IT_DATA1.
LOOP AT IT_DATA1 .
  read table iT_320 INTO wa_320 with key werks = it_data1-werks
                                          lgort = it_data1-lgort.
  IF sy-subrc = 0 .
    delete it_data1 index sy-tabix.
  ENDIF.
endloop.
  LOOP AT IT_DATA1 .
    MOVE-CORRESPONDING IT_DATA1 TO IT_DATA_h.
    Collect it_data_h.
  ENDLOOP.
  Clear it_data_h.
clear : it_data1.
THEN MY BDC IS LIKE THIS.
LOOP AT IT_DATA_H .
perform bdc_dynpro      using 'SAPMM07M' '0400'.
perform bdc_field       using 'BDC_CURSOR'
                              'RM07M-WERKS'.
perform bdc_field       using 'BDC_OKCODE'
                              '/00'.
perform bdc_field       using 'MKPF-BLDAT' LV_DATE  .
perform bdc_field       using 'MKPF-BUDAT' LV_DATE.
perform bdc_field       using 'RM07M-BWARTWA' '261'.
perform bdc_field       using 'RM07M-WERKS' IT_DATA_H-WERKS.
perform bdc_dynpro      using 'SAPMM07M' '0421'.
perform bdc_field       using 'BDC_CURSOR'
                              'MSEG-WERKS(03)'.
CLEAR : FLAG1, W_FLAG.
LOOP AT IT_DATA1 WHERE aufnr = it_data_H-aufnr.
W_FLAG = 1.
CONCATENATE 'MSEG-MATNR' '(' W_FLAG ')' INTO W_MATNR_C.
perform bdc_field       using  W_MATNR_C
                               IT_DATA1-MATNR.
CLEAR : QTY.
QTY = IT_DATA1-ERFMG.
SHIFT  QTY LEFT DELETING LEADING SPACE.
END LOOP.
NOW HOW TO COMPARE THE MATERIALS IN EXCEL AND  BDC POSTED.
PLEASE PROVIDE THE CODE FOR THAT AND HOW TO DISPLAY.