大多数时候我现在使用@mjolinor 提供的 CmdLet,但在两种情况下我仍然使用以下老式 XML 序列化:
1- 当我必须使用 PowerShell V2
2- 即使在 PowerShell V3 中,当Web 服务返回的 json 非常大时,PowerShell V3 也会发送异常。
Add-Type -AssemblyName System.ServiceModel.Web, System.Runtime.Serialization
$utf8 = [System.Text.Encoding]::UTF8
function Write-String
{
PARAM([Parameter()]$stream,
[Parameter(ValueFromPipeline=$true)]$string)
PROCESS
{
$bytes = $utf8.GetBytes($string)
$stream.Write( $bytes, 0, $bytes.Length )
}
}
function Convert-JsonToXml
{
PARAM([Parameter(ValueFromPipeline=$true)][string[]]$json)
BEGIN
{
$mStream = New-Object System.IO.MemoryStream
}
PROCESS
{
$json | Write-String -stream $mStream
}
END
{
$mStream.Position = 0
try
{
$jsonReader = [System.Runtime.Serialization.Json.JsonReaderWriterFactory]::CreateJsonReader($mStream,[System.Xml.XmlDictionaryReaderQuotas]::Max)
$xml = New-Object Xml.XmlDocument
$xml.Load($jsonReader)
$xml
}
finally
{
$jsonReader.Close()
$mStream.Dispose()
}
}
}
function Convert-XmlToJson
{
PARAM([Parameter(ValueFromPipeline=$true)][Xml]$xml)
PROCESS
{
$mStream = New-Object System.IO.MemoryStream
$jsonWriter = [System.Runtime.Serialization.Json.JsonReaderWriterFactory]::CreateJsonWriter($mStream)
try
{
$xml.Save($jsonWriter)
$bytes = $mStream.ToArray()
[System.Text.Encoding]::UTF8.GetString($bytes,0,$bytes.Length)
}
finally
{
$jsonWriter.Close()
$mStream.Dispose()
}
}
}
在您的情况下,这将提供以下内容:
$json = @'
{
"data": {
"langid": 7,
"results": [{
"first_aired": "2010-11-15",
"name": "Accused",
"tvdbid": 72663
},
{
"first_aired": "2010-01-17",
"name": "Enzai: Falsely Accused",
"tvdbid": 135881
}]
},
"message": "",
"result": "success"
}
'@
$xmlOut = Convert-JsonToXml -json $json
($xmlOut.root.data.results).ChildNodes[0].tvdbid.InnerText
($xmlOut.root.data.results).ChildNodes[1].tvdbid.InnerText