CSV/Powershell 添加 -Header

Question

我有这个循环：

foreach($line in Get-Content .\script2.csv)
{ $firstname = $line.split(';')[0] 
$lastname = $line.split(';')[1]
$email = $line.split(';')[2] 
$newLine = """$firstname"",""$lastname"",""$email"""
$newLine >> newCSV.csv }

我想添加一个特定的标题，但我不知道在我的小脚本中应该在哪里写“-header”。

谢谢

编辑：

我有一个这样的文件：

A;B;C 
A;B;C 
A;B;C 
A;B;C 

我需要这个：

"info1","info2","info3",...,"info18" 
"A","B",C","","","","","","","","","","","","","","",""
"A","B",C","","","","","","","","","","","","","","",""
"A","B",C","","","","","","","","","","","","","","",""
"A","B",C","","","","","","","","","","","","","","",""

Answer 1

正如我所评论的，这可以简单地在没有循环的情况下完成：

您的输入 CSV (script2.csv)

A;B;C 
A;B;C 
A;B;C 
A;B;C 

# get objects from the input csv file and provide headers for the data
# then save this data with the default delimiter comma to a new file
Import-Csv -Path '.\script2.csv' -Delimiter ';'  -Header 'info1','info2','info3','info4','info5' | 
Export-Csv -Path '.\newCsv.csv' -NoTypeInformation

会给你一个新文件“newCsv.csv”，如下所示：

"info1","info2","info3","info4","info5"
"A","B","C",,
"A","B","C",,
"A","B","C",,
"A","B","C",,

---

如果您需要更多字段，您可以简单地创建一个字符串数组来隐藏所有想要的标题并使用它。

类似

$header = 1..18 | ForEach-Object {"info$_"}
Import-Csv -Path '.\script2.csv' -Delimiter ';' -Header $header | 
Export-Csv -Path '.\newCsv.csv' -NoTypeInformation

这将保存带有此内容的 newCsv.csv：

"info1","info2","info3","info4","info5","info6","info7","info8","info9","info10","info11","info12","info13","info14","info15","info16","info17","info18"
"A","B","C",,,,,,,,,,,,,,,
"A","B","C",,,,,,,,,,,,,,,
"A","B","C",,,,,,,,,,,,,,,
"A","B","C",,,,,,,,,,,,,,,

ANY 读取此类文件的软件应该能够处理空字段，因为绝对没有理由用 "" 填充这些字段以表示该字段为空。读取/导入 CSV无论如何，应该总是以 strings 的形式返回值，就像 Import-Csv 所做的那样。

---

• Import-Csv 从分隔符分隔值文件中的项目创建类似表格的自定义对象。通常此分隔符是逗号，因此扩展名为 逗号分隔值 (.csv)
• Export-Csv 将对象转换为一系列分隔符分隔值 (CSV) 字符串并将字符串保存到文件中。
• Get-Content 获取文本文件的内容并返回一个字符串数组，其中的行在换行符处分割。
  将开关 -Raw 添加到此 cmdlet 时，它将文件内容作为包含换行符的单个多行字符串返回。