(VB.NET) PayPal Send Invoice

Sends a PayPal invoice to a customer.

See also Send Invoice

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

' Note: Requires Chilkat v9.5.0.64 or greater.

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

' Load our previously obtained access token. (see PayPal OAuth2 Access Token)
Dim jsonToken As New Chilkat.JsonObject
jsonToken.LoadFile("qa_data/tokens/paypal.json")

' Build the Authorization request header field value.
Dim sbAuth As New Chilkat.StringBuilder
' token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf("token_type"))
sbAuth.Append(" ")
sbAuth.Append(jsonToken.StringOf("access_token"))

' Make the initial connection.
' A single REST object, once connected, can be used for many PayPal REST API calls.
' The auto-reconnect indicates that if the already-established HTTPS connection is closed,
' then it will be automatically re-established as needed.
Dim rest As New Chilkat.Rest
Dim bAutoReconnect As Boolean = True
Dim success As Boolean = rest.Connect("api.sandbox.paypal.com",443,True,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' ----------------------------------------------------------------------------------------------
' The code above this comment could be placed inside a function/subroutine within the application
' because the connection does not need to be made for every request.  Once the connection is made
' the app may send many requests..
' ----------------------------------------------------------------------------------------------

' Build a path using a draft invoice ID.
Dim sbPath As New Chilkat.StringBuilder
sbPath.Append("/v1/invoicing/invoices/invoice_id/send")
Dim numReplacements As Integer = sbPath.Replace("invoice_id","INV2-QCHR-QHSD-M2VU-AVXC")

rest.AddHeader("Authorization",sbAuth.GetAsString())
rest.AddQueryParam("notify_merchant","true")

Dim responseBody As String = rest.FullRequestFormUrlEncoded("POST",sbPath.GetAsString())
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code = " & rest.ResponseStatusCode)

' Did we get a 202 accepted response?
If (rest.ResponseStatusCode <> 202) Then
    Debug.WriteLine(responseBody)
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' If the 202 response is received, the response body would be empty...
Debug.WriteLine("Success.")