(VB.NET) Xero List Attachments for an Item (such as an Invoice)

Demonstrates how to get information about the attachments for a particular Xero item.

For more information, see https://developer.xero.com/documentation/api/attachments#GET

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

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

Dim http As New Chilkat.Http

Dim jsonToken As New Chilkat.JsonObject
Dim success As Boolean = jsonToken.LoadFile("qa_data/tokens/xero-access-token.json")
If (success = False) Then
    Debug.WriteLine(jsonToken.LastErrorText)
    Exit Sub
End If


http.AuthToken = jsonToken.StringOf("access_token")

' Replace the value here with an actual tenant ID obtained from this example:
' Get Xero Tenant IDs
http.SetRequestHeader("Xero-tenant-id","83299b9e-5747-4a14-a18a-a6c94f824eb7")


http.Accept = "application/json"


Dim url As String = "https://api.xero.com/api.xro/2.0/{$Endpoint}/{$Guid}/Attachments/"

' Endpoint can be Invoices, Receipts, CreditNotes, PurchaseOrders, etc.
http.SetUrlVar("Endpoint","Invoices")

' Guid is the ID of the item, such as the InvoiceID.
http.SetUrlVar("Guid","0032f627-3156-4d30-9b1c-4d3b994dc921")


Dim resp As Chilkat.HttpResponse = http.QuickRequest("GET",url)
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code: " & resp.StatusCode)

Dim jsonResponse As New Chilkat.JsonObject
jsonResponse.Load(resp.BodyStr)
jsonResponse.EmitCompact = False
Debug.WriteLine(jsonResponse.Emit())

If (resp.StatusCode <> 200) Then
    Debug.WriteLine("Failed.")

    Exit Sub
End If




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

' {
'   "Id": "24bfbcb9-dec9-4d33-835c-8f165d776766",
'   "Status": "OK",
'   "ProviderName": "Chilkat2222",
'   "DateTimeUTC": "\/Date(1587213296972)\/",
'   "Attachments": [
'     {
'       "AttachmentID": "daf106e2-8634-4349-bfcc-86c1df0793b2",
'       "FileName": "penguins.jpg",
'       "Url": "https://api.xero.com/api.xro/2.0/Invoices/0032f627-3156-4d30-9b1c-4d3b994dc921/Attachments/penguins.jpg",
'       "MimeType": "image/jpg",
'       "ContentLength": 777835
'     }
'   ]
' }

Dim AttachmentID As String
Dim FileName As String
Dim v_Url As String
Dim MimeType As String
Dim ContentLength As Integer

Dim Id As String = jsonResponse.StringOf("Id")
Dim Status As String = jsonResponse.StringOf("Status")
Dim ProviderName As String = jsonResponse.StringOf("ProviderName")
Dim DateTimeUTC As String = jsonResponse.StringOf("DateTimeUTC")
Dim i As Integer = 0
Dim count_i As Integer = jsonResponse.SizeOfArray("Attachments")
While i < count_i
    jsonResponse.I = i
    AttachmentID = jsonResponse.StringOf("Attachments[i].AttachmentID")
    FileName = jsonResponse.StringOf("Attachments[i].FileName")
    v_Url = jsonResponse.StringOf("Attachments[i].Url")
    MimeType = jsonResponse.StringOf("Attachments[i].MimeType")
    ContentLength = jsonResponse.IntOf("Attachments[i].ContentLength")
    i = i + 1
End While