替換在PowerShell中

Question

的app.config項節點的值具有以下的app.config：

<configuration> 
<appSettings> 
<add key="filepath" value="D:\Data" /> 
<add key="node2" value="..." /> 
... 
</appSettings> 
</configuration> 

我想通過替換「d來替換具有新值「文件路徑」鍵（設置：\數據..' 在這種情況下）。新值應該作爲參數傳遞給powershell腳本。由於

Answer 1

更新基於註釋：

$xml = [xml]'<configuration> 
<appSettings> 
<add key="filepath" value="D:\Data" /> 
<add key="filename" value="test.log" /> 
</appSettings> 
</configuration>' 

$xml.configuration.appSettings.add | foreach { if ($_.key -eq 'filepath') { $_.value = "C:\Data" } } 
$xml.Save("C:\dell\NewApp.config") 

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OLD ANSWER

$xml = [xml]'<configuration> 
<appSettings> 
<add key="filepath" value="D:\Data" /> 
</appSettings> 
</configuration>' 

$xml.configuration.appSettings.add.value = "C:\Data" 
$xml.Save("NewApp.config") 

或

$xml = [xml](Get-Content App.config) 
$xml.configuration.appSettings.add.value = "C:\Data" 
$xml.Save("NewApp.Config")