B4X

JSON: Nested Objects

See more JSON Examples

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
    }
}

B4X

Dim success As Boolean = False

Dim json As ChilkatJsonObject
json.Initialize

'  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 = "{" & Chr(34) & "name" & Chr(34) & ": " & Chr(34) & "donut" & Chr(34) & "," & Chr(34) & "image" & Chr(34) & ":{" & Chr(34) & "fname" & Chr(34) & ": " & Chr(34) & "donut.jpg" & Chr(34) & "," & Chr(34) & "w" & Chr(34) & ": 200," & Chr(34) & "h" & Chr(34) & ": 200}," & Chr(34) & "thumbnail" & Chr(34) & ":{" & Chr(34) & "fname" & Chr(34) & ": " & Chr(34) & "donutThumb.jpg" & Chr(34) & "," & Chr(34) & "w" & Chr(34) & ": 32," & Chr(34) & "h" & Chr(34) & ": 32}}"

success = json.Load(jsonStr)
If success = False Then
    Log(json.LastErrorText)
    Return
End If


'  Get the "image" object.
Dim imageObj As ChilkatJsonObject
imageObj.Initialize
json.ObjectOf2("image", imageObj)

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

'  Get the "thumbnail" object.
Dim thumbObj As ChilkatJsonObject
thumbObj.Initialize
json.ObjectOf2("thumbnail", thumbObj)

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