Save XML file after changes in powershell

Question

I've parsed the XML file and I have these strings. So, I need to replace the GUID "{87440A4C-1FE4-412E-80C3-74E4F97A31B4}" with a new GUID "{BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}". How can I save XML after these changes?

Strings which I parsed:

C:\ProgramData\Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}\Extensions\Signal Integrity  
C:\ProgramData\Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}\Extensions\Vcs_SVN_Unicode 
C:\ProgramData\Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}\Extensions\Mixed Simulation 
C:\ProgramData\Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}\Extensions\SIMetrix

$fileName = "C:\temp\Extensions\ExtensionsRegistry.xml"
$xml = [System.Xml.XmlDocument](Get-Content $fileName)

$Xml.Extensions.Item.Path.ForEach{ $_ -replace 'Program  {87440A4C-1FE4-412E-80C3-74E4F97A31B4}', "Program {BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}"}

$Xml.Save($fileName)

$yourStringArray -replace '{87440A4C-1FE4-412E-80C3-74E4F97A31B4}', '{BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}' — zett42
– zett42, Commented Jan 19, 2021 at 22:22
yes, I made this variant. But how to save the results in xml file after those changes? — zagnafey
– zagnafey, Commented Jan 19, 2021 at 22:26
$XmlDocument.Extensions.Item.Path.ForEach{ $_ -replace 'Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}', "Program {BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}"} How to apply these changes in xml file? — zagnafey
– zagnafey, Commented Jan 19, 2021 at 22:33

mklement0 · Accepted Answer · 2021-01-20 14:31:17Z

2

The -replace operator doesn't modify its LHS in place, it returns a modified copy of the LHS.
If the Path elements only have text content, using PowerShell's adaptation of the XML via dot notation returns just that text itself, not the element objects, so you cannot modify the elements that way.

Therefore, you must enumerate the Path elements differently and assign the result of the
-replace operations back to their .InnerText property:

$xml.Extensions.Item.ChildNodes.Where({ $_.Name -eq 'Path' }).ForEach({ 
  $_.InnerText = $_.InnerText -replace 'Program  {87440A4C-1FE4-412E-80C3-74E4F97A31B4}', 'Program {BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}'
})

edited Jan 20, 2021 at 14:31

answered Jan 20, 2021 at 3:38

mklement0

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Comments

Dan · Accepted Answer · 2021-01-19 22:49:32Z

0

Pipe the output to a file, via Set-Content.

answered Jan 19, 2021 at 22:49

Dan

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3 Comments

zagnafey Over a year ago

after Set-Content only parsed strings save in file

Dan Over a year ago

Maybe instead of converting the file contents to XML just do a simple text replace. (gc -raw 'C:\temp\Extensions\ExtensionsRegistry.xml') -replace 'Program {87440A4C-1FE4-412E-80C3-74E4F97A31B4}', 'Program {BBB7C1EB-B0B0-40F3-B1D0-1F28111C5806}' | sc -path 'C:\temp\Extensions\ExtensionsRegistry.xml' -force -verbose

zagnafey Over a year ago

Thanks, but I have to do it with powershell

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