批处理：如何在 FOR 循环中附加字符串

Posted 2023-03-11

【中文标题】批处理：如何在 FOR 循环中附加字符串

【英文标题】：Batch: How to append string in FOR loop

【发布时间】：2018-02-27 00:27:00

【问题描述】：

我在 FOR 循环中附加字符串时遇到问题。

我想为存储在数组中的每个名称创建子文件夹。 子文件夹属于用户指定名称的文件夹。

例如，如果我的数组中有以下名称： - 文件夹 1 - 文件夹 2 - 文件夹 3

我想要文件夹：

C:\我的文件夹\文件夹 1 C:\我的文件夹\文件夹 2 C:\MyFolder\文件夹 3

如前所述，“MyFolder”名称由用户在命令行中输入。

代码如下：

@echo off
@break off
@title Generate Billing Subfolders
@color 0a
@cls

setlocal EnableDelayedExpansion

SET "batch_path=%~dp0"
SET "first_folder=01. Folder1"
SET "second_folder=02. Folder2"
SET "third_folder=03. Folder3"

:: Create the new Working Data folder
SET /p new_folder_name= Enter Directory Name: 
SET "full_path=%batch_path%%new_folder_name%"

ECHO Working...

IF NOT EXIST ("%full_path%") (
  MKDIR %new_folder_name%
  IF "!errorlevel!" EQU "0" (
    ECHO Folder created successfully.
  ) ELSE (
    ECHO Error while creating folder.
  )
) ELSE (
  ECHO Folder already exists.
)

SET "folders_list="%first_folder%" "%second_folder%" "%third_folder%""


FOR %%f in (%folders_list%) DO (
    :: Displays the folder name in array correctly
    ECHO %%f 
    :: Displays ECHO is off. Why?
    CALL SET "updated_full_path=%full_path%\%%f"
    ECHO %updated_full_path%
    PAUSE


)
PAUSE
EXIT

【参考方案1】：

既然你已经有enabled delayed expansion：

setlocal EnableDelayedExpansion

....


FOR %%f in (%folders_list%) DO (
    :: Displays the folder name in array correctly
    ECHO %%f 
    :: Displays ECHO is off. Why?
    SET "updated_full_path=!full_path!\%%f"
    ECHO !updated_full_path!
    PAUSE


)
PAUSE

【讨论】：

谢谢！我不理解 EnableDelayedExpansion 的目的并使用“！...！”。我将按照您的指示用我的问题的答案更新代码。