(VB.NET) DVLA Vehicle Enquiry Service

Demonstrates how to make a call to the DVLA Vehicle Enquiry API to get vehicle details of a specified vehicle. It uses the vehicle registration number as input to search and provide details of the vehicle.

For more information, see https://developer-portal.driver-vehicle-licensing.api.gov.uk/apis/vehicle-enquiry-service/vehicle-enquiry-service-description.html

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 http As New Chilkat.Http
Dim success As Boolean

' Implements the following CURL command:

' curl -X POST https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles \
'   -H "x-api-key: supplied API key" \
'   -H "Accept: application/json" \
'   -d '{"registrationNumber": "ABC1234"}'

' Use the following online tool to generate HTTP code from a CURL command
' Convert a cURL Command to HTTP Source Code

' Use this online tool to generate code from sample JSON:
' Generate Code to Create JSON

' The following JSON is sent in the request body.

' {
'   "registrationNumber": "ABC1234"
' }

Dim json As New Chilkat.JsonObject
json.UpdateString("registrationNumber","ABC1234")

http.SetRequestHeader("Accept","application/json")
http.SetRequestHeader("x-api-key","supplied API key")

Dim resp As Chilkat.HttpResponse = http.PostJson3("https://driver-vehicle-licensing.api.gov.uk/vehicle-enquiry/v1/vehicles","application/json",json)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim sbResponseBody As New Chilkat.StringBuilder
resp.GetBodySb(sbResponseBody)
Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Debug.WriteLine("Response Body:")
Debug.WriteLine(jResp.Emit())

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(resp.Header)
    Debug.WriteLine("Failed.")

    Exit Sub
End If



' Sample JSON response:
' (Sample code for parsing the JSON response is shown below)

' {
'   "artEndDate": "2025-02-28",
'   "co2Emissions": 135,
'   "colour": "BLUE",
'   "engineCapacity": 2494,
'   "fuelType": "PETROL",
'   "make": "ROVER",
'   "markedForExport": false,
'   "monthOfFirstRegistration": "2004-12",
'   "motStatus": "No details held by DVLA",
'   "registrationNumber": "ABC1234",
'   "revenueWeight": 1640,
'   "taxDueDate": "2007-01-01",
'   "taxStatus": "Untaxed",
'   "typeApproval": "N1",
'   "wheelplan": "NON STANDARD",
'   "yearOfManufacture": 2004,
'   "euroStatus": "EURO 6 AD",
'   "realDrivingEmissions": "1",
'   "dateOfLastV5CIssued": "2016-12-25"
' }

' Sample code for parsing the JSON response...
' Use the following online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON




Dim artEndDate As String = jResp.StringOf("artEndDate")
Dim co2Emissions As Integer = jResp.IntOf("co2Emissions")
Dim colour As String = jResp.StringOf("colour")
Dim engineCapacity As Integer = jResp.IntOf("engineCapacity")
Dim fuelType As String = jResp.StringOf("fuelType")
Dim make As String = jResp.StringOf("make")
Dim markedForExport As Boolean = jResp.BoolOf("markedForExport")
Dim monthOfFirstRegistration As String = jResp.StringOf("monthOfFirstRegistration")
Dim motStatus As String = jResp.StringOf("motStatus")
Dim registrationNumber As String = jResp.StringOf("registrationNumber")
Dim revenueWeight As Integer = jResp.IntOf("revenueWeight")
Dim taxDueDate As String = jResp.StringOf("taxDueDate")
Dim taxStatus As String = jResp.StringOf("taxStatus")
Dim typeApproval As String = jResp.StringOf("typeApproval")
Dim wheelplan As String = jResp.StringOf("wheelplan")
Dim yearOfManufacture As Integer = jResp.IntOf("yearOfManufacture")
Dim euroStatus As String = jResp.StringOf("euroStatus")
Dim realDrivingEmissions As String = jResp.StringOf("realDrivingEmissions")
Dim dateOfLastV5CIssued As String = jResp.StringOf("dateOfLastV5CIssued")