Read json value from the http response trigger by invoke-webrequest - powershell

Question

I am trying to fetch a particular value from the JSON response of an invoke-web request. But the value is not capturing
Tried using the following script, where the $body contains the response.
$url = "http://localhost:9096/getMachineStatus"
$HTTP_Request = [System.Net.WebRequest]::Create($url)
$HTTP_Response = $HTTP_Request.GetResponse()
$HTTP_Status = [int]$HTTP_Response.StatusCode
$body = Invoke-WebRequest -Uri $url
The response of the above script:
{
"Name": "LocalTestMachine",
"Profile": "QA",
"Stacks": [
{
"Region": "Mumbai-1",
"State": "Stopped",
"StackName": "QA",
"StackCreationStatus": "CREATE_Success",
"Instances": [
{
"MachineName": "LocalMachine",
"IpAddress": "10.10.10.164",
"State": "stopped",
"InstanceId": "i-0777e90151b22da44",
"ImageId": "ami-0322ff2d8d099g56c",
"CustomImageName": "ubuntu-trusty-16.04",
"InstanceType": "m4.large",
"LaunchTime": "2019-09-04T02:42:36-04:00",
"AvailabilityZone": "Mumbai-1",
"Tags": [
{
"Key": "ProductLine",
"Value": "Cloud"
}]
}]
}]
}
I just want to retrieve the value associated with the object State which is Stopped.
I tried with
$currentVMState = $body | where {$_.State}
It is not working

Answer 1

To get the value of the first State item in the Stacks array, do this:
$json = $body | ConvertFrom-Json
$json.Stacks[0].State
returns
Stopped

Answer 2

First you need to convert the response to json:
$json = $body | ConvertFrom-Json
Then iterate the $json object to get the state value:
$json.stacks.instances | ForEach-Object { $_.State }