问题描述
我有一个命令,我已经在 PowerShell 中构建并存储在一个变量中.如果我执行 Write-Host 并复制并粘贴到标准 cmd.exe
窗口.
I have a command that I have build and stored in a variable in PowerShell. This command works if I do a Write-Host and copy and paste into a standard cmd.exe
window.
如何从脚本内部执行此命令?
How do I execute this command from inside my script?
我尝试了几种 Invoke-Command 或 Invoke-Expression 的组合,但都没有成功.
I have tried several combination of Invoke-Command or Invoke-Expression with no luck.
这是我构建变量的方式:
This is how I built the variable:
$cmd1 = $arcprg + $arcdir + "\" + $site1 + "-" + $hst + "-" + $yesterday + ".zip " + $logpath1 + "u_ex" + $yesterday + ".log"
如果变量被打印到屏幕上,这是该变量的样子:
This is what the variable looks like if it is printed to the screen:
7z.exe a -tzip c:\arc_logs\site-host-at-web1-100827.zip c:\inetpub\logs\logfiles\w3svc1\u_ex100827.log
推荐答案
这是另一种没有 Invoke-Expression
但有两个变量的方法(命令:字符串和参数:数组).这对我来说可以.认为7z.exe
在系统路径中.
Here is yet another way without Invoke-Expression
but with two variables(command:string and parameters:array). It works fine for me. Assume7z.exe
is in the system path.
$cmd = '7z.exe'
$prm = 'a', '-tzip', 'c:\temp\with space\test1.zip', 'C:\TEMP\with space\changelog'
& $cmd $prm
如果命令是已知的 (7z.exe) 并且只有参数是可变的,那么就可以了
If the command is known (7z.exe) and only parameters are variable then this will do
$prm = 'a', '-tzip', 'c:\temp\with space\test1.zip', 'C:\TEMP\with space\changelog'
& 7z.exe $prm
顺便说一句,带有一个参数的 Invoke-Expression
也适用于我,例如这有效
BTW, Invoke-Expression
with one parameter works for me, too, e.g. this works
$cmd = '& 7z.exe a -tzip "c:\temp\with space\test2.zip" "C:\TEMP\with space\changelog"'
Invoke-Expression $cmd
附言我通常更喜欢使用参数数组的方式,因为它更容易以编程方式组合而不是为 Invoke-Expression
构建表达式.
P.S. I usually prefer the way with a parameter array because it is easier tocompose programmatically than to build an expression for Invoke-Expression
.
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