(VB.NET) HTTP POST JSON and Parse JSON Response

Demonstrates how to send a JSON POST and then parse the JSON response.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim json As New Chilkat.JsonObject

Dim success As Boolean = json.LoadFile("qa_data/json/jsonBodyForHttpPost.json")
If (success <> True) Then
    Debug.WriteLine(json.LastErrorText)
    Exit Sub
End If


Dim http As New Chilkat.Http

Dim resp As Chilkat.HttpResponse = http.PostJson2("https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums","application/json",json.Emit())
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim jsonResp As New Chilkat.JsonObject
jsonResp.Load(resp.BodyStr)

jsonResp.EmitCompact = False
Debug.WriteLine(jsonResp.Emit())

' The JSON response to be parsed looks like this:
' {
'   "LifeAmount": 513.85,
'   "LifeResidualAmount": 123.38,
'   "CriticalIllnessAmount": 0,
'   "CriticalIllnessResidualAmount": 0,
'   "DisabilityAmount": 881.70,
'   "PolicyFee": 0.00,
'   "PolicyFeeSecondary": 0,
'   "PolicyFeeHidden": 50.00,
'   "PolicyFeeHiddenSecondary": 0
' }

' We can get the floating point numbers as strings.  Then convert to double
' using the appropriate string-to-double conversion for your programming language.
' For example, in C++ use atof.  In C# use Convert.ToDouble.  
Dim lifeAmount As String = jsonResp.StringOf("LifeAmount")
Dim lifeResidualAmount As String = jsonResp.StringOf("LifeResidualAmount")

Debug.WriteLine("LifeAmount = " & lifeAmount)
Debug.WriteLine("LifeResidualAmount = " & lifeResidualAmount)