为什么我的PowerShell脚本不遵守步骤顺序? [英] Why my PowerShell script is not respecting the steps order?

问题描述

我试图独自寻找解决方案，但是现在我没有主意了.我编写了一个脚本，用于检查计算机上是否安装了Erlang:

I tried to find the solution by myself but now I'm out of ideas. I wrote a script that I want to use to check if Erlang is installed on a machine:

# Check if a Software ins installed
function Check_Program_Installed($programName) {
$x86_check = ((Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall") |
Get-ItemProperty |
        Where-Object {$_.DisplayName -like "*$programName*" } |
            Select-Object -Property DisplayName, UninstallString)

if(Test-Path 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall')  
{
$x64_check = ((Get-ChildItem "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall") |
Get-ItemProperty |
        Where-Object {$_.DisplayName -like "*$programName*" } |
            Select-Object -Property DisplayName, UninstallString)
}
if ($x86_check -and $x64_check -eq $null){ 
    write-host "$programName is not installed on this computer" -ForegroundColor Green 
    #continue
    }
elseif ($x86_check -or $x64_check -ne $null){
    write-host "On this computer is installed " -ForegroundColor Red     
    $x86_check
    $x64_check

    }
}

# Erlang check
Write-Host "Checking if Erlang exist    " -NoNewline
Check_Program_Installed("Erlang")

Write-Host "The End: the script ends here" -ForegroundColor Yellow

但是如果我将其执行为结果，则最后一行在Check_Program_Installed("Erlang")之前执行.为什么PowerShell不遵守步骤优先级?

But if I execute it as result the very last line is executed before Check_Program_Installed("Erlang"). Why PowerShell is not respecting the step priority?

Checking if Erlang exist        On this computer is installed

The End: the script ends here
DisplayName          UninstallString
-----------          ---------------
Erlang OTP 21 (10.2) C:\Program Files\erl10.2\Uninstall.exe

推荐答案

只需在最后将Format-Table添加到$ x86_check和$ 64_check.链接到答案: https://social.technet.microsoft.com/Forums/zh-CN/5f88f7c9-fbce-4c45-a2fa-806d512a0233/powershell-output-wrong-order?forum=ITCG

Just add Format-Table to $x86_check and $64_check at the end. Link to answer: https://social.technet.microsoft.com/Forums/en-US/5f88f7c9-fbce-4c45-a2fa-806d512a0233/powershell-output-wrong-order?forum=ITCG

# Check if a Software ins installed
function Check_Program_Installed($programName) {
$x86_check = ((Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall") |
Get-ItemProperty |
        Where-Object {$_.DisplayName -like "*$programName*" } |
            Select-Object -Property DisplayName, UninstallString) | Format-Table

if(Test-Path 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall')  
{
$x64_check = ((Get-ChildItem "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall") |
Get-ItemProperty |
        Where-Object {$_.DisplayName -like "*$programName*" } |
            Select-Object -Property DisplayName, UninstallString) | Format-Table
}
if ($x86_check -and $x64_check -eq $null){ 
    write-host "$programName is not installed on this computer" -ForegroundColor Green 
    #continue
    }
elseif ($x86_check -or $x64_check -ne $null){
    write-host "On this computer is installed " -ForegroundColor Red     
    $x86_check
    $x64_check

    }

}

# Erlang check
Write-Host "Checking if Erlang exist    " -NoNewline
Check_Program_Installed("Erlang")
Write-Host "The End: the script ends here" -ForegroundColor Yellow

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