如何检查程序是否已安装并安装（如果不安装）？

本文介绍了如何检查程序是否已安装并安装（如果不安装）？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

由于完整性检查，我宁愿不使用WMI。

I would rather not use WMI due the integrity check.

这就是我所做的不起作用：

This is what I have that does not work:

$tempdir = Get-Location $tempdir = $tempdir.tostring() $reg32 = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*" $reg64 = "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*" if((Get-ItemProperty $reg32 | Select-Object DisplayName | Where-Object { $_.DisplayName -Like '*Microsoft Interop Forms*' } -eq $null) -Or (Get-ItemProperty $reg64 | Select-Object DisplayName | Where-Object { $_.DisplayName -Like '*Microsoft Interop Forms*' } -eq $null)) { (Start-Process -FilePath $tempdir"\microsoft.interopformsredist.msi" -ArgumentList "-qb" -Wait -Passthru).ExitCode }

它总是返回false。如果我将它切换到 -ne $ null 它总是返回true，所以我知道它正在检测 $ null 输出，我相信（但可能是错的）， Get-ItemProperty 返回的结果应该是 $ null 。

It always returns false. If I switch it to -ne $null it always returns true so I know it is detecting $null output even though, I believe (but could be wrong), the Get-ItemProperty is returning a result that should be counting as something other than $null.

推荐答案

$tempdir = Get-Location $tempdir = $tempdir.tostring() $appToMatch = '*Microsoft Interop Forms*' $msiFile = $tempdir+"\microsoft.interopformsredist.msi" $msiArgs = "-qb" function Get-InstalledApps { if ([IntPtr]::Size -eq 4) { $regpath = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' } else { $regpath = @( 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' ) } Get-ItemProperty $regpath | .{process{if($_.DisplayName -and $_.UninstallString) { $_ } }} | Select DisplayName, Publisher, InstallDate, DisplayVersion, UninstallString |Sort DisplayName } $result = Get-InstalledApps | where {$_.DisplayName -like $appToMatch} If ($result -eq $null) { (Start-Process -FilePath $msiFile -ArgumentList $msiArgs -Wait -Passthru).ExitCode }