读取Invoke-RestMethod返回的Powershell对象

Question

I am having trouble using Invoke-RestMethod in PS and retrieving the results...

here is my code:

$request='https://sandbox.api.dell.com/support/assetinfo/v4/getassetwarranty/SERVICETAG?apikey=APIKEY'
Invoke-RestMethod $request |
Select $request.ServiceTag 

The JSON returned by the DELL API call looks like this:

{
"AssetWarrantyResponse": [
{

  "AssetHeaderData": {
    "BUID": "202",
    "ServiceTag": "XXXXXXX",
    "ShipDate": "2017-12-04T18:00:00",
    "CountryLookupCode": "UK",
    "LocalChannel": "ENTP",
    "CustomerNumber": "NNNNNN",
    "ItemClassCode": "OB002",
    "IsDuplicate": false,
    "MachineDescription": "Latitude 7480",
    "OrderNumber": "123456789",
    "ParentServiceTag": null
  },
  "ProductHeaderData": {
    "SystemDescription": "Latitude 7480",
    "ProductId": "latitude-14-7480-laptop",
    "ProductFamily": "Laptops",
    "LOB": "Latitude",
    "LOBFriendlyName": "Latitude"
  },
  "AssetEntitlementData": [
    {
      "StartDate": "2017-12-04T18:00:00",
      "EndDate": "2020-12-05T17:59:59",
      "ServiceLevelDescription": "Onsite Service After Remote Diagnosis (Consumer Customer)/ Next Business Day Onsite After Remote Diagnosis (Commercial Customer)",
      "ServiceLevelCode": "ND",
      "ServiceLevelGroup": 5,
      "EntitlementType": "INITIAL",
      "ServiceProvider": null,
      "ItemNumber": "123-12345"
    },
    {
      "StartDate": "2017-12-04T06:00:00",
      "EndDate": "2025-12-05T05:59:59",
      "ServiceLevelDescription": "Dell Digitial Delivery",
      "ServiceLevelCode": "D",
      "ServiceLevelGroup": 11,
      "EntitlementType": "INITIAL",
      "ServiceProvider": null,
      "ItemNumber": "525-10302"
    }
   ]
  }
],
"InvalidFormatAssets": { "BadAssets": [ ] },
"InvalidBILAssets": { "BadAssets": [ ] },
"ExcessTags": { "BadAssets": [ ] },
"AdditionalInformation": null
}

I need to get several values from that JSON response, I tried using ConvertFrom-Json with |Select ServiceTag, SystemDescription, EndDate by following the advice in MS TechNet Scripting Guy: Playing with JSON and PowerShell

But couldn't get values for ServiceTag, SystemDescription, EndDate (they were blank) - eventually we need to run this in a script for nearly 1500 computers in blocks of 80 at a time and update a database

So where am I going wrong here?

I did try something like Invoke-RestMethod $request | Select $request.AssetHeaderData.ServiceTag Invoke-RestMethod $request | Select $request.AssetHeaderData.ServiceTag but had no luck

Answer 1

$req = Invoke-RestMethod $request
$warranties = $req.AssetWarrantyResponse.AssetEntitlementData[0]
$dellasset  = $req.AssetWarrantyResponse.productheaderdata