使用Get-WmiObject卸载 [英] Uninstalling using Get-WmiObject

问题描述

我想在一个批处理脚本运行PowerShell命令。我试着去删除客户端PC和我的生活的老RMM工具的所有痕迹不能得到这条线正常运行。

I'm trying to run a PowerShell command in a batch script. Im trying to remove all traces of an old RMM tool from client PCs and for the life of me can't get this line to run correctly.

我们的想法是，这个搜索具有在供应商名称为N-能并传递GUID到 $ nableguid 变量，然后软件 msiexec.exe的对上述发现的GUID。

The idea is that this searches for software that has N-Able in the vendor name and passes the GUID to the $nableguid variable and then msiexec.exe against the GUIDs found above.

PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& {$nableguid = (Get -WmiObject Win32_Product -Filter "vendor LIKE '%N-able%'" | Select -ExpandProperty IdentifyingNumber); foreach ($nguid in $nableguid){ & MsiExec.exe /X$nguid /quiet} }";

电流误差是如下

Get-WmiObject : A positional parameter cannot be found that accepts argument ''. 
At line:1 char:18
+ & {$nableguid = (Get-WmiObject Win32_Product -Filter vendor LIKE '' | Select -Ex ...
+                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [Get-WmiObject], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.GetWmiObjectCommand

我知道，这归结为业务的订单和报价当前组织，但与订购了一个小时左右后，搞乱我仍然无法得到它的正常工作。

I know that this boils down to orders of operations and the current organization of quotations, but after messing around with the ordering for an hour I still cant get it to work correctly.

推荐答案

您会收到这个错误，因为你使用的是双引号字符串内转义百分比字符和双引号：

You're getting that error, because you're using unescaped percent characters and double quotes inside a double-quoted string:

"& {... -Filter "vendor LIKE '%N-able%'" ...}"

上面的计算结果为 -Filter厂商LIKE''在执行PowerShell命令，即只标记厂商作为参数传递给参数 -Filter 通过。 LIKE 和作为单独传递的位置的参数。

The above evaluates to -Filter vendor LIKE '' when the PowerShell command is executed, i.e. only the token vendor is passed as an argument to the parameter -Filter. LIKE and '' are passed as separate positional parameters.

您必须逃离嵌套双引号preserve他们的PowerShell命令：

You must escape the nested double quotes to preserve them for the PowerShell command:

"& {... -Filter \"vendor LIKE '%N-able%'\" ...}"

您还必须加倍％字符（这就是他们是如何在批处理/ CMD转义），否则％N-能够％将是的PowerShell执行之前PTED为批处理变量，扩展到一个空字符串间$ p $ 命令行。

You must also double the % characters (that's how they are escaped in batch/CMD), otherwise %N-able% would be interpreted as a batch variable and expanded to an empty string before the execution of the powershell commandline.

"& {... -Filter \"vendor LIKE '%%N-able%%'\" ...}"

随着中说，一般来说它会简单得多实施PowerShell的code在PowerShell脚本：

With that said, in general it would be far simpler to implement the PowerShell code in a PowerShell script:

$nableguid = Get -WmiObject Win32_Product -Filter "vendor LIKE '%N-able%'" |
             Select -ExpandProperty IdentifyingNumber)

foreach ($nguid in $nableguid) {
  & MsiExec.exe /X$nguid /quiet
}

和运行通过 - 文件参数的脚本（如果你必须从一个批处理文件摆在首位运行它）：

and run that script via the -File parameter (if you must run it from a batch file in the first place):

powershell.exe -NoProfile -ExecutionPolicy Bypass -File "C:\path\to\script.ps1"

这是更好的方法是完全省略批处理脚本，并在PowerShell中执行的一切。

An even better approach would be to drop the batch script entirely and implement everything in PowerShell.

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