Powershell to updatea value in a .config file

Question

I'm rubbish at powershell and need to write a script to update the following:

filename : ReadandWrite.exe.config

Section:

<appSettings>
<add key="S_H" value="qhgQHyoZmG4xLdRVgIx4b+MPBaonXWGbZKK7jJQeXk8="/>
<add key="S_U" value="SQZHftF2qaGTAPv6Jl7PXVH1rVJMPlQKR53jnQNM1j0="/>
<add key="S_P" value="/V+jVFleFBvXyLJ7U2xZ0kZR7/hTJbB2MkbF1VCRQns="/>
<add key="ScreenMaskWordVersionSwitch" value="16.0.7000.0"/>
<add key="CheckItUnderlineAdjustmentWordVersionSwitch" value="16.0.12827.0"/>
<add key ="Login" value="1"/>
<add key ="BlockLaunchOnStartup" value="0"/>
<add key ="BlockSupportExtensionInChrome" value="0"/>
<add key ="BlockAutoUpdates" value="0"/>
</appSettings>

I want to change the value for key BlockSupportExtensionInChrome from 0 to 1 with a powershell script.

Thanks

Answer 1

Hi @Laura Griffiths ,

maybe this works for you:

((Get-Content -Path ".\ReadandWrite.exe.config" -Raw) -replace '"BlockSupportExtensionInChrome" value="0"', '"BlockSupportExtensionInChrome" value="1"') |  
Set-Content -Path ".\ReadandWrite.exe.config"  

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

Answer 2

Hi @Laura Griffiths ,

I found this solution posted in StackOverflow (https://stackoverflow.com/questions/53386446/find-the-key-and-replace-its-respective-value-in-config-xml-files-using-powershe). Credit goes to the original author.

This is bit more lengthy. See if this works for you which I adapted to your post.

Sample Code

$infile = “./ReadandWrite.exe.config”
$outfile = “./ReadandWrite.exe.config.new”

$xmlDoc = New-Object xml
$xmlDoc.Load($infile)

$nodes = $xmlDoc.SelectNodes(‘//appSettings/add[@Key =“BlockSupportExtensionInChrome”]’)

foreach($node in $nodes) {
$node.value = $node.value.Replace(‘0’,’1’)
}

$xmlDoc.Save($outfile)