如何使用ConvertTo-Json将字符串转换为整数？

Question

我正在使用PowerShell将CSV文件转换为JSON格式。问题是CSV会用双引号将列值括起来，甚至是整数。如何在转换过程中将它们转换为整数？

这是我用来将*.csv文件目录转换为*.json的脚本：

Get-ChildItem .\*.csv | Foreach-Object {
  $basename = $_.BaseName
  import-csv $_ | ConvertTo-Json -Compress | Foreach {$_ -creplace '"NULL"','null'} | Out-File ".\$basename.json"
}

这是我的源CSV：

"Id","Name","Active"
"1","Test 1","1"
"2","Test 2","0"
"3","Test 3","1"

下面是它的输出：

[
{"Id":"1","Name":"Test 1","Active":"1"}
{"Id":"2","Name":"Test 2","Active":"0"}
{"Id":"3","Name":"Test 3","Active":"1"}
]

我如何让它输出以下内容？：

[
{"Id":1,"Name":"Test 1","Active":1}
{"Id":2,"Name":"Test 2","Active":0}
{"Id":3,"Name":"Test 3","Active":1}
]

Answer 1

发生这种情况的原因是，Csv Import-为每一列创建了一个具有字符串属性的对象，因此Csv会为您提供带引号的字符串。您可以在导入-Csv和ConvertTo-Json之间使用Select-Object来将数字属性重新转换为整数，但我认为最简单的方法是在您的foreach块中添加一个正则表达式替换：

import-csv $_ | ConvertTo-Json -Compress | 
    Foreach {$_ -creplace '"NULL"','null' -replace ':"([0-9]+)"',':$1'} | 
        Out-File ".\$basename.json"