(PowerBuilder) 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
    }
}

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Json
string ls_JsonStr
integer li_Success
oleobject loo_ImageObj
oleobject loo_ThumbObj

loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_Json
    MessageBox("Error","Connecting to COM object failed")
    return
end if

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

li_Success = loo_Json.Load(ls_JsonStr)
if li_Success <> 1 then
    Write-Debug loo_Json.LastErrorText
    destroy loo_Json
    return
end if

// Get the "image" object.
loo_ImageObj = loo_Json.ObjectOf("image")
if loo_Json.LastMethodSuccess = 0 then
    Write-Debug "image object not found."
    destroy loo_Json
    return
end if

Write-Debug "image: fname=" + loo_ImageObj.StringOf("fname") + ", width=" + string(loo_ImageObj.IntOf("w")) + ", height=" + string(loo_ImageObj.IntOf("h"))

destroy loo_ImageObj

// Get the "thumbnail" object.
loo_ThumbObj = loo_Json.ObjectOf("thumbnail")
if loo_Json.LastMethodSuccess = 0 then
    Write-Debug "thumbnail object not found."
    destroy loo_Json
    return
end if

Write-Debug "thumbnail: fname=" + loo_ThumbObj.StringOf("fname") + ", width=" + string(loo_ThumbObj.IntOf("w")) + ", height=" + string(loo_ThumbObj.IntOf("h"))

destroy loo_ThumbObj


destroy loo_Json