从批变量去掉空格 [英] Removing spaces from a variable in batch

问题描述

我写一个文件，从文件名的文件夹中删除空格，然后把结果在 .TXT 文件。我刚刚得到一个结果的回音是。一遍又一遍。

I am writing a file to remove spaces from filenames in a folder and then put the result in a .txt file. I just get a result of "Echo is on." over and over.

这是我迄今为止：

@echo ON
SET LOCAL EnableDelayedExpansion
For %%# in (*.*) do (
    SET var=%%~n#
    Set MyVar=%var%
    set MyVar=%MyVar: =%
    echo %MyVar%>>text.txt
)

谁能告诉我什么是错？

Can someone tell me whats wrong?

推荐答案

为什么你所得到的原因 ECHO处于开启状态。，是因为没有使用拖延扩张，这导致的值％VAR％和％为​​MyVar％在将要插入命令运行，因为他们并没有在一开始定义的空变量插入当回声％为MyVar％方式＆gt;＆GT;的text.txt 已运行，它是作为PTED 回声＆GT;＆GT;的text.txt 。当回声不带任何参数运行，它输出回波无论是打开还是关闭，这是你在获得的text.txt 。

The reason why you are getting ECHO is on. is because delayed expansion was not used, which caused the value of %var% and %MyVar% to be inserted before the for command is run, and since they were not defined at the start, empty variables were inserted in. When the echo %MyVar%>>text.txt was run, it was interpreted as echo >>text.txt. When echo is run without any arguments, it outputs whether echo is on or off, which is what you get in text.txt.

要解决这个问题，你必须做两件事情：

To fix the problem, you have to do two things:

第一，有什么不对您的第二道防线。有一个在 SETLOCAL 组和地方之间没有空格。第二行应该是 SETLOCAL EnableDelayedExpansion 。

First, there is something wrong with your second line. There is no space between set and local in setlocal. The second line should be SETLOCAL EnableDelayedExpansion.

二，使用延迟扩展，您有来替换所有％ S IN的每个变量！，像！无功！而不是％VAR％。

Second, to use delayed expansion, you have to replace all %s in each variable with !, like !var! instead of %var%.

最终结果：

@echo ON
SETLOCAL EnableDelayedExpansion
For %%# in (*.*) do (
    SET var=%%~n#
    Set MyVar=!var!
    set MyVar=!MyVar: =!
    echo !MyVar!>>text.txt
)

您其实并不需要在这种情况下，使用临时变量，你可以做设置为MyVar = %%〜N＃并跳到设置为MyVar = MyVar的：！=

You actually do not need to use a temporary variable in this case, you can just do SET MyVar=%%~n# and skip to set MyVar=!MyVar: =!.

这篇关于从批变量去掉空格的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！