(VB.NET UWP/WinRT) Outlook -- List Selected Fields in Messages

Demonstrates how to list the messages in a particular Outlook mailbox folder, but selects particular fields to be returned.

This uses the OData $select system query option. See OData System Query Option $select for general information.

Also see OData URL Conventions for information about $select and other query options.

Note: This example requires Chilkat v9.5.0.68 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

Dim http As New Chilkat.Http

' Use your previously obtained access token here:
' See the following examples for getting an access token:
'    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
'    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
'    Refresh Access Token (Azure AD v2.0 Endpoint).
'    Refresh Access Token (Azure AD Endpoint).

http.AuthToken = "MICROSOFT_GRAPH_ACCESS_TOKEN"

Dim sbResponse As New Chilkat.StringBuilder

' In this example, we'd like to get the messages in the folder "/Inbox",
' but we must specify the corresponding folder_id.  The best way to do this is to create
' a local map of folderPaths-to-folderIds.
' This example does it:  Create Outlook Folder Map)
Dim htFolderMap As New Chilkat.Hashtable
Dim sbMap As New Chilkat.StringBuilder
sbMap.LoadFile("qa_data/outlook/folderMap.xml","utf-8")
htFolderMap.AddFromXmlSb(sbMap)

' Get the ID for the "/Inbox" folder:
Dim folderId As String = htFolderMap.LookupStr("/Inbox")
If (htFolderMap.LastMethodSuccess <> True) Then
    Debug.WriteLine("Folder ID not found")
    Exit Sub
End If

http.SetUrlVar("folder_id",folderId)


' Send the request to list the messages, returning only the subject and from address.
Dim success As Boolean = Await http.QuickGetSbAsync("https://graph.microsoft.com/v1.0/me/mailFolders/{$folder_id}/messages?$select=subject,from",sbResponse)
If ((success <> True) And (http.LastStatus = 0)) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim json As New Chilkat.JsonObject
json.LoadSb(sbResponse)
json.EmitCompact = False

Debug.WriteLine("Status code = " & http.LastStatus)
If (http.LastStatus <> 200) Then
    Debug.WriteLine(json.Emit())
    Debug.WriteLine("Failed.")
End If


Debug.WriteLine(json.Emit())

' In my test case, the raw JSON returned is shown below.
' Iterate over the messages to get information about each..

Dim i As Integer = 0
Dim numMessages As Integer = json.SizeOfArray("value")
While i < numMessages
    json.I = i

    ' This is the id for the email message.
    ' For REST API calls that require particular email message id, this is what should be used..
    Dim messageId As String = json.StringOf("value[i].id")
    Debug.WriteLine("id: " & messageId)
    Debug.WriteLine("From Name: " & json.StringOf("value[i].from.emailAddress.name"))
    Debug.WriteLine("From Addr: " & json.StringOf("value[i].from.emailAddress.address"))
    Debug.WriteLine("Subject: " & json.StringOf("value[i].subject"))
    Debug.WriteLine("--")

    i = i + 1
End While

' The output of the above loop:
' 
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj1oAAAA=
' 	From Name: Chilkat Software
' 	From Addr: admin@chilkat.io
' 	Subject: This is an example email from chilkat.io
' 	--
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj1kAAAA=
' 	From Name: Chilkat Support
' 	From Addr: chilkat.support@gmail.com
' 	Subject: Hello from GMail
' 	--
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAHrLra8AAAA=
' 	From Name: Microsoft Office 365
' 	From Addr: MicrosoftOffice365@email.office.com
' 	Subject: The latest for you in Office 365
' 	--
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_EAAAA=
' 	From Name: Amazon Web Services
' 	From Addr: no-reply-aws@amazon.com
' 	Subject: Amazon SES Address Verification Request in region US West (Oregon)
' 	--
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_AAAAA=
' 	From Name: Amazon Web Services
' 	From Addr: no-reply-aws@amazon.com
' 	Subject: Amazon SES Address Verification Request in region US West (Oregon)
' 	--
' 	id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAAG6l8UAAAA=
' 	From Name: Microsoft
' 	From Addr: msa@communication.microsoft.com
' 	Subject: Updates to our terms of use and privacy statement
' 	--
' 


' ------------------------------------------------------
' This is the raw JSON response:

' {
'   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('me')/mailFolders('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA')/messages(subject,from)",
'   "value": [
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADOpwfo\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj1oAAAA=",
'       "subject": "This is an example email from chilkat.io",
'       "from": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "admin@chilkat.io"
'         }
'       }
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADOpwfn\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAM6Jj1kAAAA=",
'       "subject": "Hello from GMail",
'       "from": {
'         "emailAddress": {
'           "name": "Chilkat Support",
'           "address": "chilkat.support@gmail.com"
'         }
'       }
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAB63d8O\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAHrLra8AAAA=",
'       "subject": "The latest for you in Office 365",
'       "from": {
'         "emailAddress": {
'           "name": "Microsoft Office 365",
'           "address": "MicrosoftOffice365@email.office.com"
'         }
'       }
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAA1jyl7\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_EAAAA=",
'       "subject": "Amazon SES Address Verification Request in region US West (Oregon)",
'       "from": {
'         "emailAddress": {
'           "name": "Amazon Web Services",
'           "address": "no-reply-aws@amazon.com"
'         }
'       }
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAA1jyl6\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAADLHd_AAAAA=",
'       "subject": "Amazon SES Address Verification Request in region US West (Oregon)",
'       "from": {
'         "emailAddress": {
'           "name": "Amazon Web Services",
'           "address": "no-reply-aws@amazon.com"
'         }
'       }
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AAAGt5YG\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgEMAAAA5_vF7TKKdE6bGCRqXyl2PQAAAAG6l8UAAAA=",
'       "subject": "Updates to our terms of use and privacy statement",
'       "from": {
'         "emailAddress": {
'           "name": "Microsoft",
'           "address": "msa@communication.microsoft.com"
'         }
'       }
'     }
'   ]
' }