(VB.NET UWP/WinRT) CardConnect Capture

Demonstrates how to send a CardConnect Capture request.

The capture service queues the transaction amount for settlement. Capture can occur within the authorization request or subsequently. ...

See https://developer.cardconnect.com/cardconnect-api#capture

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

' 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

http.BasicAuth = True
http.Login = "API_USERNAME"
http.Password = "API_PASSWORD"

' Build and send the following JSON:

' The "retref" is the value returned in the JSON response for the Authorization request.

' {
'     "retref":"112989260941",
'     "merchid":"MERCHANT_ID"
' }

Dim json As New Chilkat.JsonObject
json.UpdateString("retref","112989260941")
json.UpdateString("merchid","MERCHANT_ID")

Dim url As String = "https://<site>.cardconnect.com:<port>/cardconnect/rest/capture"
Dim responseStr As String = Await http.PutTextAsync(url,json.Emit(),"utf-8","application/json",False,False)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


' A response status of 200 indicates potential success.  The JSON response body
' must be examined to determine if it was truly successful or an error.
Debug.WriteLine("response status code = " & http.LastStatus)

Dim jsonResp As New Chilkat.JsonObject
jsonResp.Load(responseStr)
jsonResp.EmitCompact = False

Debug.WriteLine("response JSON:")
Debug.WriteLine(jsonResp.Emit())

' A successful response looks like this:

' {
'   "amount": "0.20",
'   "resptext": "Approval",
'   "setlstat": "Queued for Capture",
'   "commcard": " C ",
'   "respcode": "00",
'   "batchid": "1900942291",
'   "merchid": "MERCHANT_ID",
'   "token": "9418594164541111",
'   "authcode": "PPS158",
'   "respproc": "FNOR",
'   "retref": "112989260941",
'   "respstat": "A",
'   "account": "9418594164541111"
' }

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

Dim amount As String = jsonResp.StringOf("amount")
Dim resptext As String = jsonResp.StringOf("resptext")
Dim setlstat As String = jsonResp.StringOf("setlstat")
Dim commcard As String = jsonResp.StringOf("commcard")
Dim respcode As String = jsonResp.StringOf("respcode")
Dim batchid As String = jsonResp.StringOf("batchid")
Dim merchid As String = jsonResp.StringOf("merchid")
Dim token As String = jsonResp.StringOf("token")
Dim authcode As String = jsonResp.StringOf("authcode")
Dim respproc As String = jsonResp.StringOf("respproc")
Dim retref As String = jsonResp.StringOf("retref")
Dim respstat As String = jsonResp.StringOf("respstat")
Dim account As String = jsonResp.StringOf("account")