如何将 CSV 中的 CSV 值分隔到 PowerShell 中的新行中

Question

我从一个无法修改为 CSV 的系统收到一份自动报告。我正在使用 PowerShell 将 CSV 拆分为多个文件并解析出所需的特定数据。 CSV 包含的列可能不包含数据、1 个值或在 CSV 文件本身中以逗号分隔的多个值。

示例（为清楚起见已更新）：

"Group","Members"  
"Event","362403"  
"Risk","324542, 340668, 292196"  
"Approval","AA-334454, 344366, 323570, 322827, 360225, 358850, 345935"  
"ITS","345935, 358850"  
"Services",""  

我希望数据每行有一个这样的条目（为清晰而更新）：

"Group","Members"  
"Event","362403"  
"Risk","324542"  
"Risk","340668"  
"Risk","292196"  
#etc.

我尝试拆分数据，但最后得到的列数未知。

我尝试了foreach 循环，但似乎无法正确处理（下面的伪代码）：

Import-CSV $Groups
ForEach ($line in $Groups){
    If($_.'Members'.count -gt 1, add-content "$_.Group,$_.Members[2]",)}

感谢您提供的任何帮助。我已经搜索了所有 stackexchange 帖子并使用了 Google，但找不到可以解决这个确切问题的内容。

Answer 1

Import-Csv .\input.csv | ForEach-Object {
    ForEach ($Member in ($_.Members -Split ',')) {
        [PSCustomObject]@{Group = $_.Group; Member = $Member.Trim()}
    }
} | Export-Csv .\output.csv -NoTypeInformation

Answer 2

# Get the raw text contents
$CsvContents = Get-Content "\path\to\file.csv"

# Convert it to a table object
$CsvData = ConvertFrom-CSV -InputObject $CsvContents

# Iterate through the records in the table
ForEach ($Record in $CsvData) {
    # Create array from the members values at commas & trim whitespace
    $Record.Members -Split "," | % {
        $MemberCount = $_.Trim()
        # Check if the count is greater than 1
        if($MemberCount -gt 1) {
            # Create our output string
            $OutputString = "$($Record.Group), $MemberCount"
            # Write our output string to a file
            Add-Content -Path "\path\to\output.txt" -Value $OutputString
        }
    }
}

这应该可行，您的想法是正确的，但我认为您可能遇到了一些语法问题。如果您有任何问题，请告诉我:)

Answer 3

根据您更新的问题修改了代码，

$List = Import-Csv "\path\to\input.csv"

foreach ($row in $List) {
    $Group = $row.Group
    $Members = $row.Members -split ","

    # Process for each value in Members
    foreach ($MemberValue in $Members) {
        # PS v3 and above
        $Group + "," + $MemberValue | Export-Csv "\path\to\output.csv" -NoTypeInformation -Append
        # PS v2
        # $Group + "," + $MemberValue | Out-File "\path\to\output.csv" -Append
    }
}