(VB.NET) JSON: Nested Objects

Here we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects.

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

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Dim json As New 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. 
Dim jsonStr As String = "{""name"": ""donut"",""image"":{""fname"": ""donut.jpg"",""w"": 200,""h"": 200},""thumbnail"":{""fname"": ""donutThumb.jpg"",""w"": 32,""h"": 32}}"

Dim success As Boolean = json.Load(jsonStr)
If (success <> True) Then
    Debug.WriteLine(json.LastErrorText)
    Exit Sub
End If


' Get the "image" object.
Dim imageObj As Chilkat.JsonObject = json.ObjectOf("image")
If (json.LastMethodSuccess = False) Then
    Debug.WriteLine("image object not found.")
    Exit Sub
End If


Debug.WriteLine("image: fname=" & imageObj.StringOf("fname") & ", width=" & imageObj.IntOf("w") & ", height=" & imageObj.IntOf("h"))



' Get the "thumbnail" object.
Dim thumbObj As Chilkat.JsonObject = json.ObjectOf("thumbnail")
If (json.LastMethodSuccess = False) Then
    Debug.WriteLine("thumbnail object not found.")
    Exit Sub
End If


Debug.WriteLine("thumbnail: fname=" & thumbObj.StringOf("fname") & ", width=" & thumbObj.IntOf("w") & ", height=" _
     & thumbObj.IntOf("h"))