如何从本地计算机读取/写入文本文件

Question

report  try1.
class register definition.
  public section.
    methods: constructor.
class-data: read_data type pa0008-bet01,    "i tried string first, but i found this one
endclass.                                       "still doesnt work
class register implementation.
 method constructor.
  data sometext(100) value 'C:Userstgbtstj3DesktopZzZzZz.txt'.
  open dataset sometext for input in text mode encoding default.
  do.
   read dataset sometext into read_data.
   if sy-subrc <> 0.
    exit.
   endif.
   close dataset sometext.
   write / read_data.
  enddo.
 endmethod.
endclass.
data reg type ref to register.
START-OF-SELECTION.
create object reg.

这是我的代码，我刚开始ABAP编程，想做一个小程序来学习......但是我无法从本地计算机读取 txt 文件，无法继续......错误显示文件未打开...和cx_sy_file_open_mode捕获的异常

Answer 1

语句 OPEN DATASET 用于访问应用程序服务器上的文件。要访问前端，请使用类CL_GUI_FRONTEND_SERVICES的方法。有关示例，请查看报告GRAPHICS_IGS_ZIPPER_DEMO。

Answer 2

data file(100) value '.myfile'.
data num type string.
open dataset file for output in text mode encoding default.
close dataset file.

然后将read_data更改为：

class-data: num type string.

查找所有read_data并将其更改为 NUM。