批处理if语句在for循环中不起作用 [英] Batch if statement not working in for loop

问题描述

我很难让if语句在for中工作 环形.任何帮助将不胜感激.

I'm having a hard time getting the if statement to work within the for loop. Any help would be appreciated.

for %%i in (*.txt) do (
set filename=%%i
set filenametrunc=!filename:~0,28!
If %filename:~0,28%==ProjectLoad_Refresh_%today% (
Set fileName=%filenametrunc%
)
)

推荐答案

我真的不明白为什么不使用"ProjectLoad_Refresh_%today%*.txt"作为通配符模式而不是仅使用*.txt，但是此代码应该可以工作:

I do not really understand why not using "ProjectLoad_Refresh_%today%*.txt" as wildcard pattern instead of just *.txt, but this code should work:

@echo off
setlocal EnableExtensions EnableDelayedExpansion
set "Today=2017-08-11"
for %%I in (*.txt) do (
    set "FileName=%%I"
    set "TruncatedName=!FileName:~0,28!"
    if "!TruncatedName!" == "ProjectLoad_Refresh_%Today%" set "FileName=!TruncatedName!"
)
endlocal

有一个例外:文件名包含1个或多个感叹号.

There is one exception: A file name contains 1 or more exclamation marks.

要了解所使用的命令及其工作方式，请打开命令提示符窗口，在其中执行以下命令，并非常仔细地阅读每个命令显示的所有帮助页面.

For understanding the used commands and how they work, open a command prompt window, execute there the following commands, and read entirely all help pages displayed for each command very carefully.

• echo /?
• endlocal /?
• for /?
• if /?
• set /?
• setlocal /?

• echo /?
• endlocal /?
• for /?
• if /?
• set /?
• setlocal /?

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