循环批处理脚本将不设置变量 [英] Batch script for loop won't set variable

问题描述

我有一个批处理脚本试图执行了垤获取包含PLSQL文件夹名称进行编译。

I have a batch script trying to execute out of anthill to get the folder names containing plsql to be compiled.

for /F %%a in ('dir /b D:\AHP_WorkDir\var\jobs\projects\rprt_test\rprt_test\plsql') do (
  set FOLDER=%%a
  echo *** PROCESSING FOLDER %FOLDER% ***
)

这回声
*处理FOLDER *

，如果变量是没有得到设置，这我是pretty上验证它花费的时间太长后肯定是真实的。

as if the variable is not getting set, which I'm pretty sure is true after spending way too long on verifying it

所以...我是什么做错了吗？

So...What am I doing wrong?

推荐答案

的这基本上是一个<一个重复href=\"http://stackoverflow.com/questions/12513691/cmd-get-string-from-file-and-set-it-as-a-variable-to-use-in-cd\">question问今天早些时候的。下面是我的回答对上述问题... 的

This is essentially a duplicate of a question asked earlier today. Here's my answer from said question...

您会想看看的批处理文件的 EnableDelayedExpansion 选项。从以上链接：

You'll want to look at the EnableDelayedExpansion option for batch files. From the aforementioned link:

延迟的变量扩充与for循环工作时是非常有用。通常情况下，环整个被评为即使它跨越了一个批处理脚本的多行一个命令。

Delayed variable expansion is often useful when working with FOR Loops. Normally, an entire FOR loop is evaluated as a single command even if it spans multiple lines of a batch script.

所以，你的脚本最终将看起来像这样：

So your script would end up looking something like this:

@echo off
setlocal enabledelayedexpansion

for /F %%a in ('dir /b D:\AHP_WorkDir\var\jobs\projects\rprt_test\rprt_test\plsql') do (
  set FOLDER=%%a
  echo *** PROCESSING FOLDER !FOLDER! ***
)

作为替代方案，只需要使用 %%在内环A 变量，而不是创建一个新的变量。

As an alternative, just use the %%a variable in your inner loop, rather than creating a new variable.

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