如何编写上传（PC->AS）和下载（AS－>PC）程序示例

REPORT Z_HO_TTT .

parameters: pm_cr type TRKORR obligatory.

data: c_file(80), d_file(80).

DATA: C_L TYPE STRING, D_L TYPE STRING.

data: str(12).

str = pm_cr.

*shift str left by 3 places.
*str+7(1) = '.'.
*str+8(3) = pm_cr(3).

concatenate '/usr/sap/trans/cofiles/' pm_cr into c_file.
CONCATENATE 'C:\' pm_cr INTO C_L.
str(1) = 'R'.
concatenate '/usr/sap/trans/data/' pm_cr INTO D_FILE.
CONCATENATE 'C:\' pm_cr INTO D_L.

DATA: BEGIN OF I_LIST OCCURS 0,
    STR(500),
    END OF I_LIST.

DATA: I TYPE I, J TYPE I.
*文本文件下载
OPEN DATASET C_FILE FOR INPUT IN TEXT MODE.
DO.
  READ DATASET C_FILE INTO I_LIST.
  IF SY-SUBRC NE 0.
    EXIT.
  ENDIF.
  APPEND I_LIST.
ENDDO.
close dataset c_file.

CALL FUNCTION 'GUI_DOWNLOAD'
  EXPORTING
*   BIN_FILESIZE                  =
    filename                      = C_L
*   FILETYPE                      = 'ASC'
  tables
    data_tab                      = I_LIST
          .

REFRESH I_LIST.
CLEAR: I_LIST.
CLEAR: I.
*二进值文件下载
OPEN DATASET D_FILE FOR INPUT IN BINARY MODE.
DO.
  READ DATASET D_FILE INTO I_LIST LENGTH J.
  IF SY-SUBRC NE 0 AND J = 0.
    EXIT.
  ENDIF.
  I = I + J.
  APPEND I_LIST.
ENDDO.
close dataset D_file.

CALL FUNCTION 'GUI_DOWNLOAD'
  EXPORTING
    BIN_FILESIZE                  = I
    filename                      = D_L
    FILETYPE                      = 'BIN'
  tables
    data_tab                      = I_LIST.