导入 1 列 csv，替换字符串，然后将每一行连接成一行，值用引号括起来

Question

我正在使用 powershell，并且我有一个包含大量数据的 csv 文件，但我唯一关心的字段是第一个字段。

我需要：

1. 提取带有标题的第一列数据：Ticket_ID
2. 从该列 (site:) 中的值中删除尾随字符串
3. 将列中的所有值合并到一个以空格分隔的行中，但要确保每个值都保留将每个值括起来的双引号。
4. 在此行前添加一个长字符串并将其写入文件。 （我还没有尝试解决这部分问题，因为我无法让 1-3 充分工作。）

我已经尝试了这段代码的几种排列方式：

    $TT = (Import-Csv '.\sourcefile.csv').______Ticket_ID______ -join (" ")
    $TT = $TT -replace 'site:',''
    $TT | Set-Content -Path .\JulyTickets.csv

我的 csv 示例：

"______Ticket_ID______","____________Title____________","___________CreateDate___________"
"site:TICKET1","SOMETITLE","01/01/1901"
"site:TICKET2","SOMETITLE","01/01/1901"
"site:TICKET3","SOMETITLE","01/01/1901"
"site:TICKET4","SOMETITLE","01/01/1901"
"site:TICKET5","SOMETITLE","01/01/1901"

我的不满： 如果我使用 Export-CSV，则生成的 csv 仅包含值的字符长度。

如果我使用 Set-Content，我可以成功提取第一列，并删除前导字符串 (site:)，将所有行合并为一行，并将其写入文件但它不保留csv 中每个值的双引号（“site:TICKET1”）。输出如下所示：

TICKET1 TICKET2 TICKET3 TICKET4 TICKET5

我不确定我在这里做的事情是否有问题，或者我是否遗漏了一些东西，但我无法将两个值都内联，并单独用引号括起来。

所需输出：

this is a long string that needs to be prepended to the data "TICKET1" "TICKET2" "TICKET3" "TICKET4" "TICKET5"

Answer 1

应该这样做。最终需要管道和PowerShell的Calculated Properties表达式是为了克服powershell去除双引号

$string = 'this is a long string that needs to be prepended to the data ' + (Get-Content -Path \.sourcefile.csv | Convertfrom-Csv -Delimiter "," | select ______Ticket_ID______ -ExpandProperty ______Ticket_ID______ | ForEach-Object {$_ -replace 'site:', '';} | select @{ Name = 'Ticket';  Expression = {$([char]34) + $_ + $([char]34)}} | Select Ticket -ExpandProperty Ticket);
write-host $string

返回

this is a long string that needs to be prepended to the data "TICKET1" "TICKET2" "TICKET3" "TICKET4" "TICKET5"

Answer 2

试试这个，我使用-Header 参数，因为唯一需要的列是第一个。

$csv = @'
"______Ticket_ID______","____________Title____________","___________CreateDate___________"
"site:TICKET1","SOMETITLE","01/01/1901"
"site:TICKET2","SOMETITLE","01/01/1901"
"site:TICKET3","SOMETITLE","01/01/1901"
"site:TICKET4","SOMETITLE","01/01/1901"
"site:TICKET5","SOMETITLE","01/01/1901"
'@ |
ConvertFrom-Csv -Header ID |
Select-Object -Skip 1 |
ForEach-Object {
    '"{0}"' -f $_.ID.TrimStart('site:')
}

$toPrepend = 'this is a long string that needs to be prepended to the data'

"$toPrepend $($csv -join ' ')"

# Above yields => this is a long string that needs to be prepended to the data "TICKET1" "TICKET2" "TICKET3" "TICKET4" "TICKET5"

注意，我在这里仅使用 ConvertFrom-Csv 作为示例，但在您的情况下，它应该如下所示：

$TT = Import-Csv '.\sourcefile.csv' -Header ID | Select-Object -Skip 1 | ForEach-Object {
    '"{0}"' -f $_.ID.TrimStart('site:')
}

$toPrepend = 'this is a long string that needs to be prepended to the data'

"$toPrepend $($TT -join ' ')" | Out-File JulyTickets.csv # => Not sure why CSV here, since this is no longer a CSV