我如何检查是否安装了特定的MSI？

Question

我正在写一个powershell脚本，将为我的webapp安装一些依赖关系。在我的脚本中，我遇到了一个反复检查特定应用程序是否安装的问题。似乎有一种独特的方式来检查每个应用程序是否存在应用程序（即：通过检查此文件夹或此文件的现有存在:)。是否没有办法通过查询已安装的应用程序列表来检查应用程序是否已安装？

Answer 1

这里是我有时使用的代码（不要过于频繁，所以...）。详细信息请参阅帮助注释。

<# 
.SYNOPSIS 
    Gets uninstall records from the registry. 

.DESCRIPTION 
    This function returns information similar to the "Add or remove programs" 
    Windows tool. The function normally works much faster and gets some more 
    information. 

    Another way to get installed products is: Get-WmiObject Win32_Product. But 
    this command is usually slow and it returns only products installed by 
    Windows Installer. 

    x64 notes. 32 bit process: this function does not get installed 64 bit 
    products. 64 bit process: this function gets both 32 and 64 bit products. 
#> 

function Get-Uninstall 
{ 
    # paths: x86 and x64 registry keys are different 
    if ([IntPtr]::Size -eq 4) { 
     $path = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' 
    } 
    else { 
     $path = @(
      'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' 
      'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' 
     ) 
    } 

    # get all data 
    Get-ItemProperty $path | 
    # use only with name and unistall information 
    .{process{ if ($_.DisplayName -and $_.UninstallString) { $_ } }} | 
    # select more or less common subset of properties 
    Select-Object DisplayName, Publisher, InstallDate, DisplayVersion, HelpLink, UninstallString | 
    # and finally sort by name 
    Sort-Object DisplayName 
} 

Get-Uninstall 

Answer 2

让你的脚本扫描：

• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall

set-location HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall 
Get-ChildItem | foreach-object { $_.GetValue("DisplayName") } 

Answer 3

要获取安装的应用程序的列表尝试：

$r = Get-WmiObject Win32_Product | Where {$_.Name -match 'Microsoft Web Deploy' } 
if ($r -ne $null) { ... } 

参见Win32_Product的文档获取更多信息。