PowerShell 2.0 ConvertFrom-Json 和 ConvertTo-Json 实现
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PowerShell 2.0 ConvertFrom-Json and ConvertTo-Json implementation
提问by Josh Petitt
I would like to monkeypatch a PowerShell 2.0 environment where the upgrade to 3.0 is not possible at this time.
我想对目前无法升级到 3.0 的 PowerShell 2.0 环境进行猴子补丁。
I am looking for a PowerShell 2.0 script implementation of the ConvertFrom-Jsoncmdlet and ConvertTo-Jsoncmdlet that are in PowerShell 3.0.
我正在寻找PowerShell 3.0 中ConvertFrom-Jsoncmdlet 和ConvertTo-Jsoncmdlet的 PowerShell 2.0 脚本实现。
I am most interested in the ConvertFrom-Json, but ConvertTo-Jsonwould also be nice.
我对 最感兴趣ConvertFrom-Json，但ConvertTo-Json也会很好。
回答by Edward
function ConvertTo-Json20([object] $item){
add-type -assembly system.web.extensions
$ps_js=new-object system.web.script.serialization.javascriptSerializer
return $ps_js.Serialize($item)
}
function ConvertFrom-Json20([object] $item){
add-type -assembly system.web.extensions
$ps_js=new-object system.web.script.serialization.javascriptSerializer
#The comma operator is the array construction operator in PowerShell
return ,$ps_js.DeserializeObject($item)
}
回答by cdoughty
I'm unable to comment on the currently top rated post above, however you can run these registry commands (more details):
我无法对上面当前评价最高的帖子发表评论，但是您可以运行这些注册表命令（更多详细信息）：
reg add hklm\software\microsoft\.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1 /f
reg add hklm\software\wow6432node\microsoft\.netframework /v OnlyUseLatestCLR /t REG_DWORD /d 1 /f
to allow the above ConvertTo-Json20and ConvertTo-Json20functions to work if you're getting the error:
如果您收到错误，则允许上述ConvertTo-Json20和ConvertTo-Json20功能正常工作：
Add-Type : Could not load file or assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35 or one of its dependencies. The system cannot find the file specified. "
回答by Artem Mikryukov
Code with javascriptSerializer return objects with Dictionary inside. Modern convertfrom-JSON (4.0+) return objects only. This code transform deserialize object to modern output :)
带有 javascriptSerializer 的代码返回带有 Dictionary 的对象。现代 convertfrom-JSON (4.0+) 仅返回对象。此代码将对象反序列化为现代输出:)
function Iterate-Tree($jsonTree) {
$result = @()
foreach ($node in $jsonTree) {
$nodeObj = New-Object psobject
foreach ($property in $node.Keys) {
if ($node[$property] -is [System.Collections.Generic.Dictionary[String, Object]] -or $node[$property] -is [Object[]]) {
$inner = @()
$inner += Iterate-Tree $node[$property]
$nodeObj | Add-Member -MemberType NoteProperty -Name $property -Value $inner
} else {
$nodeObj | Add-Member -MemberType NoteProperty -Name $property -Value $node[$property]
#$nodeHash.Add($property, $node[$property])
}
}
$result += $nodeObj
}
return $result
}
function ConvertFrom-Json20{
[cmdletbinding()]
Param (
[parameter(ValueFromPipeline=$true)][object] $PS_Object
)
add-type -assembly system.web.extensions
$PS_JavascriptSerializer=new-object system.web.script.serialization.javascriptSerializer
$PS_DeserializeObject = ,$PS_JavascriptSerializer.DeserializeObject($PS_Object)
#Convert Dictionary to Objects
$PS_DeserializeObject = Iterate-Tree $PS_DeserializeObject
return $PS_DeserializeObject
}
回答by Sean Bulger
I am unable to comment on Edward's answer above. I know this question is older and most people have moved on from it, but I just spent a good amount of time trying to correct the issue seen by other users when using the ConvertTo-JSON20 above.
我无法评论爱德华在上面的回答。我知道这个问题已经很老了，大多数人已经离开了它，但我只是花了很多时间试图纠正其他用户在使用上面的 ConvertTo-JSON20 时看到的问题。
I was receiving the error below when trying to update a list of sites from a JSON file to an updated list.
尝试将站点列表从 JSON 文件更新为更新列表时，我收到以下错误。
"Exception calling "Serialize" with "1" argument(s): "A circular reference was detected while serializing an object of type 'System.Management.Automation.PSMethod'"
“使用“1”个参数调用“Serialize”的异常：“在序列化'System.Management.Automation.PSMethod'类型的对象时检测到循环引用”
When I cast the array by using $array = @() it creates the array as a generic Object[], however, if you explicitly cast the array as a string (by using [string[]]$array = @() ConvertTo-JSON20 is able to convert the string to JSON.
当我使用 $array = @() 转换数组时，它会将数组创建为通用 Object[]，但是，如果您将数组显式转换为字符串（通过使用 [string[]]$array = @() ConvertTo -JSON20 能够将字符串转换为 JSON。
