(PowerShell) PayPal - Generate Invoice Number

Generates the next invoice number that is available to the user.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# Note: Requires Chilkat v9.5.0.65 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)
$jsonToken = New-Object Chilkat.JsonObject
$jsonToken.LoadFile("qa_data/tokens/paypal.json")

# Build the Authorization request header field value.
$sbAuth = New-Object 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.
$rest = New-Object Chilkat.Rest
$bAutoReconnect = $true
$success = $rest.Connect("api.sandbox.paypal.com",443,$true,$bAutoReconnect)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

# ----------------------------------------------------------------------------------------------
# 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..
# ----------------------------------------------------------------------------------------------

# Clear the REST object of any headers or query params from previous requests.
$rest.ClearAllHeaders()
$rest.ClearAllQueryParams()

$rest.AddHeader("Authorization",$sbAuth.GetAsString())

# Send the POST request with an emtpy body and get the JSON response.
$sbJsonRequest = New-Object Chilkat.StringBuilder
$sbJsonResponse = New-Object Chilkat.StringBuilder
$success = $rest.FullRequestSb("POST","/v1/invoicing/invoices/next-invoice-number",$sbJsonRequest,$sbJsonResponse)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

$json = New-Object Chilkat.JsonObject
$json.EmitCompact = $false
$json.LoadSb($sbJsonResponse)

$("Response Status Code = " + $rest.ResponseStatusCode)

# Did we get a 200 success response?
if ($rest.ResponseStatusCode -ne 200) {
    $($json.Emit())
    $("Failed.")
    exit
}

# Sample JSON response is shown below.
$($json.Emit())
$("----------------------")
$("Next invoice number: " + $json.StringOf("number"))
$("success")

# ------------------------------------------------
# A sample JSON response:

# 	{ 
# 	  "number": "0003"
# 	}