Windows BAT：测试特定文件是否为空
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Windows BAT : test if a specific file is empty
提问by Réj?me
I would like to check if a specific file is empty in a windows .bat file. Here is my non working script :
我想检查 Windows .bat 文件中的特定文件是否为空。这是我的非工作脚本：
set dir="C:\test"
set file="%dir%\fff.txt"
cd %dir%
if %file%%~zi == 0 exit
ftp -s:"%dir%\ftp.action"
exit
Could you help me debug this please ?
你能帮我调试一下吗？
采纳答案by jeb
Or try it with
或者试试
@echo off
set "dir=C:\temp"
set "file=%dir%\a.txt"
call :CheckEmpty "%file%"
goto :eof
:CheckEmpty
if %~z1 == 0 exit
ftp -s:"%dir%\ftp.action"
goto :eof
The main difference is that I use a function call and use the %~z1, as the modifiers only works for paramters like %1, %2..%9 or for-loop parameters like %%a ...
主要区别在于我使用函数调用并使用 %~z1，因为修饰符仅适用于 %1、%2..%9 之类的参数或 %%a ... 之类的 for 循环参数。
回答by BearCode
batch solution using file compare:
使用文件比较的批处理解决方案：
type nul > blank
fc myfile blank > nul
if errorlevel 1 echo myfile is not empty
回答by Mark Mooibroek
Try this:
尝试这个：
Const ForReading = 1
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFile = objFSO.OpenTextFile("c:\boot.ini", ForReading)
Dim arrFileLines()
i = 0
Do Until objFile.AtEndOfStream
Redim Preserve arrFileLines(i)
arrFileLines(i) = objFile.ReadLine
i = i + 1
Loop
objFile.Close
