(PowerShell) Get the Index of a JSON Member

This example demonstrates how to get the index of a given member by name.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

$json = New-Object Chilkat.JsonObject

# This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars).
# The presence of whitespace chars for pretty-printing makes no difference to the Load
# method. 
$jsonStr = "{`"name`": `"donut`",`"image`":{`"fname`": `"donut.jpg`",`"w`": 200,`"h`": 200},`"thumbnail`":{`"fname`": `"donutThumb.jpg`",`"w`": 32,`"h`": 32}}"

$success = $json.Load($jsonStr)
if ($success -ne $true) {
    $($json.LastErrorText)
    exit
}

# The top-level JSON object has three members: name, image, and thumbnail.
$nameIndex = $json.IndexOf("name")
# The index of the "name" member is 0.
$("nameIndex = " + $nameIndex)

$thumbIndex = $json.IndexOf("thumbnail")
# The index of the "thumbnail" member is 2.
$("thumbIndex = " + $thumbIndex)

# The "fname" member is NOT a direct member of the top-level JSON object.
# It is a member of a nested object.  If we try to get the index of this
# member using the top-level JSON object, it is not found (and returns -1).
$fnameIndex = $json.IndexOf("fname")
# The fnameIndex is -1 (not found).  This is correct.
$("fnameIndex = " + $fnameIndex)

# Get the "image" object.
$imageObj = $json.ObjectOf("image")
if ($json.LastMethodSuccess -eq $false) {
    $("image object not found.")
    exit
}

# Now we can get the index of the "fname" object, because it is a direct
# member of the "image" object:
$fnameIndex = $imageObj.IndexOf("fname")
$("fnameIndex = " + $fnameIndex)