PowerShell中提取systeminfo命令结果中指定信息的方法求助

Hey Dale, great question! The issue here is that systeminfo outputs plain text lines instead of structured PowerShell objects (like how Get-ADUser returns objects with properties you can access directly). That's why trying $s."System Boot Time" doesn't work—there's no such property on a string array.

Here are a couple of straightforward ways to get the System Boot Time you need:

Method 1: Directly match and extract the line #

This is quick if you only need one specific piece of info:

# First capture the systeminfo output
$s = systeminfo /s majorsys01

# Find the line containing "System Boot Time"
$bootTimeLine = $s | Select-String "System Boot Time:"

# Split the line at the colon, take the second part, and trim extra spaces
$bootTime = $bootTimeLine -split ":", 2 | Select-Object -Index 1 | ForEach-Object { $_.Trim() }

# Output the result
$bootTime

The Select-String finds the right line, -split ":", 2 breaks it into two parts (so we don't split on any colons in the time itself), then we clean up the whitespace with Trim().

Method 2: Convert the output to a structured object #

If you want to easily access multiple pieces of info later, convert the text output into a PowerShell object first:

$s = systeminfo /s majorsys01

# Filter out empty lines, convert "Label: Value" to "Label=Value", then turn into a custom object
$systemInfoObject = $s | 
    Where-Object { $_ -match ": " } | 
    ForEach-Object { $_ -replace ": ", "=" } | 
    ConvertFrom-StringData | 
    ForEach-Object { [PSCustomObject]$_ }

# Now you can access properties just like Get-ADUser!
$systemInfoObject."System Boot Time"

Now you can grab other details too, like $systemInfoObject."OS Version" or $systemInfoObject."Total Physical Memory" without writing new matching logic.

Hope that solves your puzzle! 😊

备注：内容来源于stack exchange，提问作者Dale