如何在 Windows 中使用 Ruby 获取已安装应用程序的列表? [英] How to get list of installed applications using Ruby in Windows?

问题描述

我知道使用 wmi 查询 WIN32_product 可以读取已安装的应用程序列表，但该列表与控制面板下的添加/删除程序列表不同.另一种方法是在 Windows 注册表中读取 Software\Microsoft\Windows\CurrentVersion\Uninstall?

I know that using wmi query WIN32_product one can read the list of installed applications but the list is different from add/remove program list under control panel. Another approach would be to read Software\Microsoft\Windows\CurrentVersion\Uninstall in windows registry?

我正在使用以下几行 ruby​​ 代码来做到这一点，但它不起作用

I am using the following few lines of ruby code to do that but it is not working

在这个例子中，我正在寻找一个名为 Branding 的软件(当我在 Windows 7 PC 中通过 regedit 时它会显示)

For this example I am looking for a software by the name of Branding (it shows when I go thru regedit in my windows 7 PC)

Win32::Registry::HKEY_LOCAL_MACHINE.open('Software\Microsoft\Windows\CurrentVersion\Uninstall\Branding') do |reg|
  reg_typ, reg_val = reg.read('')
  return reg_val
end

运行这段代码后的错误信息

Error Message after running this piece of code

win32/registry.rb:528:in `open': The system cannot find
the file specified. (Win32::Registry::Error)
        from win32/registry.rb:608:in `open'

这段代码有什么问题?

推荐答案

Win32::Registry::HKEY_LOCAL_MACHINE.open(
  'Software\Microsoft\Windows\CurrentVersion\Uninstall'
) do |reg|
  reg.each_key do |key|
    k = reg.open(key)

    puts key
    puts k["DisplayName"]    rescue "?"
    puts k["DisplayVersion"] rescue "?"
    puts k["Publisher"]      rescue "?"
    puts k["URLInfoAbout"]   rescue "?"
    puts
  end
end

虽然要注意:'Software\Wow6432Node\Windows\CurrentVersion\Uninstall'

Though beware of: 'Software\Wow6432Node\Windows\CurrentVersion\Uninstall'

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