缺少ConvertTo-Json []

Question

Powershell ConverTo-Json问题，当获取一个输入.json文件，然后尝试将其作为JSON文件放回时，它会丢失“ []”（方括号）。下面的行是我正在运行的代码和注释：

1. 以.json作为输入并将其转换为对象。
2. 更改值。
3. 然后将其放回JSON文件中。

问题：输出文件丢失[]。

$data = Get-Content 'C:\_SCRIPTS\test.json' | ConvertFrom-Json 
$data.job.jobName = "Test123"
$data | ConvertTo-Json -Depth 4 | Set-Content 'C:\_SCRIPTS\test2.json'

原文：

[
    {
        "job":
        {
            "jobName": "Track_Current_Full",
            "fields":
            {
                "jobGroupName": "MediaDistributor",
                "jobTemplateLibraryName": "Media_Mover_Workflows",
                "jobTemplateName": "MediaDistributor",            
                "jobArgs":
                {
                     "MediaDistributor.Source.SourceAgent": "r-file-001.barf1.com",
                     "MediaDistributor.Source.SourceData": "g:/race2019/03_17Mel/*",
                     "MediaDistributor.Source.IncludeFiles": "*",
                     "MediaDistributor.Source.ExcludeFiles": "",
                     "MediaDistributor.Source.ExcludeSubdirectories": "Specified",
                     "MediaDistributor.Source.ExcludeSubDirList": "",
                     "MediaDistributor.Target.TargetAgents": "f-file-300.barf1.com",
                     "MediaDistributor.Target.TargetDirectory": "d:/Race2019/03_17Mel",
                     "MediaDistributor.Target.PathMappingOptions": "Source Host,Job Date/Time",
                     "MediaDistributor.Transport._sp_udp": "yes",
                     "MediaDistributor.Transport.UseWANAccelerator": "No",
                     "MediaDistributor.Transport.wANAcceleratorAggressiveness": "high",
                     "MediaDistributor.Transport.BandwidthFloor": "0",
                     "MediaDistributor.Transport.BandwidthCeiling": "0",
                     "MediaDistributor.Transport.BandwidthThrottleByTimeOfDay": "00:00;00:00;YYYYYYY;0;",                     
                     "MediaDistributor.Options._sp_encryption": "no",
                     "MediaDistributor.Options.deliveryMode": "unsigned",
                     "MediaDistributor.Options.CompressFiles": "yes",
                     "MediaDistributor.Options.followSymbolicLinks": "yes",
                     "MediaDistributor.Options.IncrementalTransfer": "yes",
                     "MediaDistributor.Options.verifyforsufficientdiskspacebeforeJobtransfersstart": "Yes",
                     "MediaDistributor.Options.verifytargetdirectoryexists": "no",                     
                     "MediaDistributor.NotificationAndLogging.EmailCondition": "Always",
                     "MediaDistributor.NotificationAndLogging.EmailTo": "",
                     "MediaDistributor.NotificationAndLogging.EmailCc": "",
                     "MediaDistributor.NotificationAndLogging.EmailBcc": "",
                     "MediaDistributor.NotificationAndLogging.emailJobFailureReportTo": "",
                     "MediaDistributor.NotificationAndLogging._sp_log_severity": "Info",                     
                     "MediaDistributor.sNMPProperties.sNMPTrapReceivers": "",
                     "MediaDistributor.sNMPProperties.sNMPTrapCommunityString": "",
                     "MediaDistributor.sNMPProperties.sNMPTrapTypes": "",          
                     "MediaDistributor.Schedule._sp_frequency": "1 H",
                     "MediaDistributor.Schedule._sp_start_at": "2017/12/20 10:11:00",
                     "MediaDistributor.Schedule.timezone": "Europe/Skopje",
                     "MediaDistributor.Schedule._sp_interrupt_on_failure": "Yes",
                     "MediaDistributor.Schedule.priority": "High",
                     "MediaDistributor.Schedule.finishBefore": ""                  
                  }
            }
        }
    }
]

转换后：

{
    "job":  {
                "jobName":  "Test123",
                "fields":  {
                               "jobGroupName":  "MediaDistributor",
                               "jobTemplateLibraryName":  "Media_Mover_Workflows",
                               "jobTemplateName":  "MediaDistributor",
                               "jobArgs":  {
                                               "MediaDistributor.Source.SourceAgent":  "r-file-001.barf1.com",
                                               "MediaDistributor.Source.SourceData":  "g:/race2019/03_17Mel/*",
                                               "MediaDistributor.Source.IncludeFiles":  "*",
                                               "MediaDistributor.Source.ExcludeFiles":  "",
                                               "MediaDistributor.Source.ExcludeSubdirectories":  "Specified",
                                               "MediaDistributor.Source.ExcludeSubDirList":  "",
                                               "MediaDistributor.Target.TargetAgents":  "f-file-300.barf1.com",
                                               "MediaDistributor.Target.TargetDirectory":  "d:/Race2019/03_17Mel",
                                               "MediaDistributor.Target.PathMappingOptions":  "Source Host,Job Date/Time",
                                               "MediaDistributor.Transport._sp_udp":  "yes",
                                               "MediaDistributor.Transport.UseWANAccelerator":  "No",
                                               "MediaDistributor.Transport.wANAcceleratorAggressiveness":  "high",
                                               "MediaDistributor.Transport.BandwidthFloor":  "0",
                                               "MediaDistributor.Transport.BandwidthCeiling":  "0",
                                               "MediaDistributor.Transport.BandwidthThrottleByTimeOfDay":  "00:00;00:00;YYYYYYY;0;",
                                               "MediaDistributor.Options._sp_encryption":  "no",
                                               "MediaDistributor.Options.deliveryMode":  "unsigned",
                                               "MediaDistributor.Options.CompressFiles":  "yes",
                                               "MediaDistributor.Options.followSymbolicLinks":  "yes",
                                               "MediaDistributor.Options.IncrementalTransfer":  "yes",
                                               "MediaDistributor.Options.verifyforsufficientdiskspacebeforeJobtransfersstart":  "Yes",
                                               "MediaDistributor.Options.verifytargetdirectoryexists":  "no",
                                               "MediaDistributor.NotificationAndLogging.EmailCondition":  "Always",
                                               "MediaDistributor.NotificationAndLogging.EmailTo":  "",
                                               "MediaDistributor.NotificationAndLogging.EmailCc":  "",
                                               "MediaDistributor.NotificationAndLogging.EmailBcc":  "",
                                               "MediaDistributor.NotificationAndLogging.emailJobFailureReportTo":  "",
                                               "MediaDistributor.NotificationAndLogging._sp_log_severity":  "Info",
                                               "MediaDistributor.sNMPProperties.sNMPTrapReceivers":  "",
                                               "MediaDistributor.sNMPProperties.sNMPTrapCommunityString":  "",
                                               "MediaDistributor.sNMPProperties.sNMPTrapTypes":  "",
                                               "MediaDistributor.Schedule._sp_frequency":  "1 H",
                                               "MediaDistributor.Schedule._sp_start_at":  "2017/12/20 10:11:00",
                                               "MediaDistributor.Schedule.timezone":  "Europe/Skopje",
                                               "MediaDistributor.Schedule._sp_interrupt_on_failure":  "Yes",
                                               "MediaDistributor.Schedule.priority":  "High",
                                               "MediaDistributor.Schedule.finishBefore":  ""
                                           }
                           }
            }
}