I have been trying to develop a script in powershell that could update / append new attribute values ( do not change existing values ) separated by " , " up to 4 values.
The format of the file is
<configuration>
<appSettings>
<add key="servername" value="server1"/>
</appSettings>
</configuration>
Desired result is
<configuration>
<appSettings>
<add key="servername" value="server1,server2,server3,server3,server4"/>
</appSettings>
</configuration>
I can add new value but cannot retain the old one by below code
$file = "C:\Users\test\Desktop\server.exe.config"
$xml = [xml] (Get-Content $file)
$XPpath = "/configuration/appSettings/add[@key='servername']"
$nodes = $xml.SelectNodes($XPpath)
foreach ( $n in $nodes ) {
$n.value = $n.value = 'server2'
}
I read help documents / searched online but could not find any tip on how to achieve the desired result. Anything I am missing? Your help is appreciated.
You're close. Value is a string so just append what you want to it like you would any other string. I use += below to do this.
$xml = [xml]@'
<configuration>
<appSettings>
<add key="servername" value="server1"/>
</appSettings>
</configuration>
'@
$XPpath = "/configuration/appSettings/add[@key='servername']"
$nodes = $xml.SelectNodes($XPpath)
foreach ( $n in $nodes ) {
$n.value += ',server2,server3,server4,server5'
}
# or
# $xml.configuration.appSettings.add.value += ",server2,server3,server4"
$xml.configuration.appSettings.add.value
# output: server1,server2,server3,server4,server5
$xml.Save(".\new.xml")
# new.xml:
# <configuration>
# <appSettings>
# <add key="servername" value="server1,server2,server3,server4,server5" />
# </appSettings>
# </configuration>
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