如果您需要使用您列出的格式（下面）...

app1name: "subid1","subid2"
app2name: "subid3","subid4"

你可以在你的文本文件上使用Get-Content，迭代每一行，用replace来获取你的应用程序名称和id，构建自定义对象并导出到csv。

$file = 'C:\MyTestFile.txt'

# Test Function to get the variables from Azure
function AzureFunctionToGetVars {
    param($SubID)
    [PSCustomObject]@{
        'var1' = "$($subID)_value1"
        'var2' = "$($subID)_value2"
    }
}  

# Get the content of the file
Get-Content -Path $file | ForEach-Object {
    $appName = $_ -replace ':.*$','' # Get the application name
    $subApps = $($($_ -replace "^$($appName): ",'') -replace '"',"") -split ',' # Get the subIDs
    $subApps | ForEach-Object {
        # Create a custom object with the application name, subID, and the variables
        $results = AzureFunctionToGetVars -SubID $_ # Azure graph call
        [PSCustomObject]@{
            'Application' = $appName
            'SubID' = $_
            'Var1' = $results.var1 
            'Var2' = $results.var2
        }
    }
    #Export the results to a CSV file
} | Export-Csv -Path 'C:\MyCSVoutput.csv' -NoTypeInformation

输出：

"Application","SubID","Var1","Var2"
"app1name","subid1","subid1_value1","subid1_value2"
"app1name","subid2","subid2_value1","subid2_value2"
"app2name","subid3","subid3_value1","subid3_value2"
"app2name","subid4","subid4_value1","subid4_value2"

我建议您将输入以文本PowerShell哈希表的形式输入，然后您可以使用Import-PowerShellDataFile导入它。
给定test.ps1（.ps1扩展名不是强制性的，它可以只是.txt或其他）：

@{
    app1name = 'subid1', 'subid2'
    app2name = 'subid3', 'subid4'
}

然后你可以导入它并返回一个哈希表。唯一的缺点可能是哈希表是无序的，所以你需要Sort-Object它，以防你需要它。

PS ..\pwsh> Import-PowerShellDataFile .\test.ps1 

Name                           Value
----                           -----
app2name                       {subid3, subid4}
app1name                       {subid1, subid2}