通常,每当我们在ABAP中处理文件时,我们都会处理驻留在SAP NetWeaver AS ABAP主机上可访问的某个目录中的文件。但是,有时我们会遇到需要从 SAP GUI 表示层客户端上传或下载文件的情况。这种远程传输是使用 RFC 协议实现的。
类 CL_GUI_FRONTEND_SERVICES 提供了许多与 SAP GUI 前端接口的有用方法。下图包含一个 UML 类图,该类图显示了一些可用于处理前端客户端上的文件和目录的方法。您可以在类生成器中可用于此类的类文档中找到有关这些方法的详细信息。
下载文件
若要下载文件,请使用方法 CL_GUI_FRONTEND_SERVICES⇒GUI_DOWNLOAD
:
ABAP
CALL METHOD CL_GUI_FRONTEND_SERVICES=>GUI_DOWNLOAD
EXPORTING
FILENAME = FULLPATH
FILETYPE = 'DAT'
CHANGING
DATA_TAB = itab
您还可以使用功能模块 GUI_DOWNLOAD
:
ABAP
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
bin_filesize = l_filesize
filename = l_filename
filetype = 'BIN'
TABLES
data_tab = ltbl_pdf
EXCEPTIONS
file_write_error = 1
no_batch = 2
gui_refuse_filetransfer = 3
invalid_type = 4
no_authority = 5
unknown_error = 6
header_not_allowed = 7
separator_not_allowed = 8
filesize_not_allowed = 9
header_too_long = 10
dp_error_create = 11
dp_error_send = 12
dp_error_write = 13
unknown_dp_error = 14
access_denied = 15
dp_out_of_memory = 16
disk_full = 17
dp_timeout = 18
file_not_found = 19
dataprovider_exception = 20
control_flush_error = 21
OTHERS = 22.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
文件上传
若要上传文件,请使用方法 CL_GUI_FRONTEND_SERVICES⇒GUI_UPLOAD
:
ABAP
CALL METHOD CL_GUI_FRONTEND_SERVICES=>GUI_UPLOAD
EXPORTING
FILENAME = FULLPATH
FILETYPE = 'DAT'
CHANGING
DATA_TAB = itab
例如:
ABAP
*DATA DECLARATION for GUI_DOWNLOAD.
DATA : lv_filename type STRING.
lv_filename = file.
CONSTANTS: LV_FILETYPE TYPE CHAR10 VALUE 'ASC'.
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
FILENAME = lv_filename
FILETYPE = 'ASC'
CODEPAGE = 'IBM'
TABLES
DATA_TAB = DATA_TAB
EXCEPTIONS
FILE_WRITE_ERROR = 1
NO_BATCH = 2
GUI_REFUSE_FILETRANSFER = 3
INVALID_TYPE = 4
NO_AUTHORITY = 5
UNKNOWN_ERROR = 6
HEADER_NOT_ALLOWED = 7
SEPARATOR_NOT_ALLOWED = 8
FILESIZE_NOT_ALLOWED = 9
HEADER_TOO_LONG = 10
DP_ERROR_CREATE = 11
DP_ERROR_SEND = 12
DP_ERROR_WRITE = 13
UNKNOWN_DP_ERROR = 14
ACCESS_DENIED = 15
DP_OUT_OF_MEMORY = 16
DISK_FULL = 17
DP_TIMEOUT = 18
FILE_NOT_FOUND = 19
DATAPROVIDER_EXCEPTION = 20
CONTROL_FLUSH_ERROR = 21
OTHERS = 22.
file = lv_filename.
您也可以使用功能模块 GUI_UPLOAD
:
ABAP
DATA : lv_filename type STRING.
lv_filename = file.
CONSTANTS: LV_FILETYPE TYPE CHAR10 VALUE 'ASC'.
CALL FUNCTION 'GUI_UPLOAD'
EXPORTING
FILENAME = lv_filename
FILETYPE = 'DAT'
CODEPAGE = 'IBM'
TABLES
DATA_TAB = data_tab
EXCEPTIONS
FILE_OPEN_ERROR = 1
FILE_READ_ERROR = 2
NO_BATCH = 3
GUI_REFUSE_FILETRANSFER = 4
INVALID_TYPE = 5
NO_AUTHORITY = 6
UNKNOWN_ERROR = 7
BAD_DATA_FORMAT = 8
HEADER_NOT_ALLOWED = 9
SEPARATOR_NOT_ALLOWED = 10
HEADER_TOO_LONG = 11
UNKNOWN_DP_ERROR = 12
ACCESS_DENIED = 13
DP_OUT_OF_MEMORY = 14
DISK_FULL = 15
DP_TIMEOUT = 16
OTHERS = 17.
file = lv_filename.
打开对话框显示
方法:CL_GUI_FRONTEND_SERVICES=>FILE_OPEN_DIALOG
功能模块:WS_FILENAME_GET
或者 F4_FILENAME
保存对话框显示
若要显示"保存文件"对话框,请使用方法 CL_GUI_FRONTEND_SERVICES⇒FILE_SAVE_DIALOG
:
ABAP
CALL METHOD CL_GUI_FRONTEND_SERVICES=>FILE_SAVE_DIALOG
CHANGING
FILENAME = FILENAME
PATH = PATH
FULLPATH = FULLPATH
EXCEPTIONS
CNTL_ERROR = 1
ERROR_NO_GUI = 2
NOT_SUPPORTED_BY_GUI = 3
OTHERS = 4
复制到剪贴板
若要将数据复制到剪贴板,请使用方法 cl_gui_frontend_services⇒clipboard_export
:
ABAP
DATA lit_char10 TYPE STANDARD TABLE OF char10 .
APPEND 'ABCDEFG' TO lit_char10.
DATA l_return TYPE i.
CALL METHOD cl_gui_frontend_services=>clipboard_export
IMPORTING
data = lit_char10
CHANGING
rc = l_return.
检查文件是否存在
-
功能模块:
DX_FILE_EXISTENCE_CHECK
-
方法:
CL_GUI_FRONTEND_SERVICES=>FILE_EXIST
选择目录
方法:CL_GUI_FRONTEND_SERVICES=>DIRECTORY_BROWSE