Get-Package命令包含xml字符串-需要转换为PSObject

Question

需要来自Get-Package SwidTagText object的Windows Update安装日期。对象是XML格式的，我尝试转换的所有内容都不起作用。

我正在尝试从WMI切换，因为它拉回结果的速度非常慢。

已尝试ConvertFrom-XML函数。我还尝试了ConvertFrom-String

Get-Package -ProviderName msu | Select-Object *

PropertyOfSoftwareIdentity : PropertyOfSoftwareIdentity
FastPackageReference       : Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.297.486.0)
ProviderName               : msu
Source                     : 
Status                     : Installed
SearchKey                  : 
FullPath                   : ?
PackageFilename            : ?
FromTrustedSource          : False
Summary                    : Install this update to revise the definition files that are used to detect viruses, spyware, and other potentially 
                             unwanted software. Once you have installed this item, it cannot be removed.
SwidTags                   : {Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.297.486.0)}
CanonicalId                : msu:Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.297.486.0)
Metadata                   : {summary,SupportUrl,Date,ResultCode}
SwidTagText                : <?xml version="1.0" encoding="utf-16" standalone="yes"?>
                             <SoftwareIdentity
                               name="Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.297.486.0)" 
                             xmlns="http://standards.iso.org/iso/19770/-2/2015/schema.xsd">
                               <Meta
                                 summary="Install this update to revise the definition files that are used to detect viruses, spyware, and other 
                             potentially unwanted software. Once you have installed this item, it cannot be removed."
                                 SupportUrl="https://go.microsoft.com/fwlink/?LinkId=52661"
                                 Date="7/5/2019 6:17:09 PM"
                                 ResultCode="2" />
                             </SoftwareIdentity>
Dependencies               : {}
IsCorpus                   : 
Name                       : Definition Update for Windows Defender Antivirus - KB2267602 (Definition 1.297.486.0)
Version                    :

Answer 1

如果您想从XML中获取原始日期，可以这样做：

$xml = ((Get-Package -ProviderName msu) | Select-Object *).SwidTagText
foreach ($item in $xml)
    {
    $(
        $(
            [xml]$item | Select-Object "InnerXml"
        ).InnerXml | Select-Xml -XPath "//*[@Date]"
    ).Node.Date
    }

这为您提供了每个条目，如下所示：

PS C:\Users\Skuld> $xml[0]
<?xml version="1.0" encoding="utf-16" standalone="yes"?>
<SoftwareIdentity
  name="Update for Windows Defender Antivirus antimalware platform - KB4052623 
(Version 4.18.1906.3)" xmlns="http://standards.iso.org/iso/19770/-2/2015/schema.xsd">
  <Meta
   summary="This package will update Windows Defender Antivirus antimalware 
platform’s components on the user machine."
    SupportUrl="https://go.microsoft.com/fwlink/?linkid=862339"
    Date="09/07/2019 10:46:52"
    ResultCode="2" />
</SoftwareIdentity>

然后使用Select-XML/XPath选择特定的日期属性。

我的示例将只给出所有日期的列表，但如果需要额外的信息，您可以对其进行调整。