(VB.NET UWP/WinRT) Demonstrates how to Handle Large Integers in JSON

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Demonstrates how to handle large integers in JSON. (Integers larger than what can fit in a 32-bit signed integer.)

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

' Let's say your JSON has this:

' {
' 	"id": 20000000001234567
' }

Dim json As New Chilkat.JsonObject

Dim success As Boolean = json.LoadFile("qa_data/json/large_int.json")
If (success = False) Then
    Debug.WriteLine(json.LastErrorText)
    Exit Sub
End If



' The integer is too large for a 32-bit signed integer that is returned by IntOf.
' The result will be something that wrapped around and could be negative.
' In this case it would be: -543893881
Dim id As Integer = json.IntOf("id")
Debug.WriteLine("id: " & id)

' The solution is to read the integer value as a string, and then use the features in your programming language
' to convert from a string to a 64-bit integer.
' 
' Alternatively, you may wish to simply hold the value as a string.  If, for example, the integer simply references
' an order ID, an account ID, etc., then there's no need to convert to an integer value.  You're not going to be doing
' mathematical operations on it anyway.  This is usually the case for large integers -- they typically exist
' in JSON as an account ID.

' You can get any JSON value as a string:
Dim accountId As String = json.StringOf("id")
Debug.WriteLine("accountId: " & accountId)

' Sample output:

' id: -543893881
' accountId: 20000000001234567