批处理（Windows）将变量设置为第一个参数不起作用 [英] Batch (Windows) set variable to first argument doesn't work

问题描述

我有一个批处理mybatch，我尝试将第一个用户参数存储在名为FILE的变量中

I have a batchscript mybatch in which I try to store the first user argument in a variable called FILE

set FILE = %1 
if defined FILE (
  echo defined
  echo do something with %1
  ) else (
   echo not defined %1 
  )

如果我通过mybatch test1执行我的批处理，则总是得到未定义的test1。为什么未定义变量FILE？

If I execute my batch via mybatch test1 I get always not defined test1. Why is variable FILE not defined?

推荐答案

变量分配中有多余的空格，因此定义了带空格的变量在名称中，其值始终以空格开头。您的IF语句正在检查是否存在没有空格的变量。

You have unwanted spaces in your variable assignment, so you have defined a variable with a space in the name that always has a value beginning with a space. Your IF statement is checking if a variable without a space exists.

请参见声明并在Windows批处理文件（.BAT）中使用变量

我建议您的第一行应为：

I recommend your first line should be:

set "FILE=%~1"

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