VB.NET

JSON: Nested Array

See more JSON Examples

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

{
 "numbers" : [ 
    ["even", 2, 4, 6, 8], 
    ["prime", 2, 3, 5, 7, 11, 13] 
  ] }

VB.NET

Dim success As Boolean = False

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 = "{ ""numbers"" : [ [""even"", 2, 4, 6, 8], [""prime"", 2, 3, 5, 7, 11, 13] ] }"

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


' Get the value of the "numbers" object, which is an array that contains JSON arrays.
Dim outerArray As Chilkat.JsonArray = json.ArrayOf("numbers")
If (json.LastMethodSuccess = False) Then
    Debug.WriteLine("numbers array not found.")
    Exit Sub
End If


Dim numArrays As Integer = outerArray.Size
Dim i As Integer

For i = 0 To numArrays - 1

    Dim innerArray As Chilkat.JsonArray = outerArray.ArrayAt(i)

    ' The first item in the innerArray is a string
    Debug.WriteLine(innerArray.StringAt(0) & ":")

    Dim numInnerItems As Integer = innerArray.Size
    Dim j As Integer
    For j = 1 To numInnerItems - 1

        Debug.WriteLine("  " & innerArray.IntAt(j))

    Next


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