(VB.NET) Outlook -- List Messages in a Specified Folder

Demonstrates how to list the messages in a particular Outlook mailbox folder.

Note: This example requires Chilkat v9.5.0.67 or greater.

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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

' 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

' Sends:  GET /users/{user_id | userPrincipalName}/mailFolders/{folder_id}/messages
' Note: It is also possible to use the literal string "me" for the current logged-on user.
' For example: GET /me/mailFolders/{folder_id}/messages

http.ClearUrlVars()
http.SetUrlVar("userPrincipalName","chilkatsoft@outlook.com")

' In this example, we'd like to get the messages in the folder "/Inbox/abc",
' 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/abc" folder:
Dim folderId As String = htFolderMap.LookupStr("/Inbox/abc")
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.
Dim success As Boolean = http.QuickGetSb("https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/mailFolders/{$folder_id}/messages",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


' 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"))

    Dim numRecipients As Integer = json.SizeOfArray("value[i].toRecipients")
    Dim j As Integer = 0
    While j < numRecipients
        json.J = j
        Debug.WriteLine("To Name: " & json.StringOf("value[i].toRecipients[j].emailAddress.name"))
        Debug.WriteLine("To Addr: " & json.StringOf("value[i].toRecipients[j].emailAddress.address"))
        j = j + 1
    End While

    Debug.WriteLine("Subject: " & json.StringOf("value[i].subject"))
    Debug.WriteLine("Has Attachments:" & json.BoolOf("value[i].hasAttachments"))

    Debug.WriteLine("Body Content-Type:" & json.StringOf("value[i].body.contentType"))
    Dim bodyContent As String = json.StringOf("value[i].body.content")
    ' ...

    Debug.WriteLine("----")

    i = i + 1
End While

' The output of the above loop:

' id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA==
' From Name: Chilkat Software
' From Addr: support@chilkatsoft.com
' To Name: Chilkat Software
' To Addr: chilkatsoft@outlook.com
' Subject: email with attachments
' Has Attachments:True
' Body Content-Type:html
' ----
' id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2gAAAA==
' From Name: Chilkat Software
' From Addr: support@chilkatsoft.com
' To Name: Chilkat Software
' To Addr: chilkatsoft@outlook.com
' To Name: admin@chilkat.io
' To Addr: admin@chilkat.io
' Subject: Re: Test HTML email with embedded images.
' Has Attachments:False
' Body Content-Type:html
' ----
' id: AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2QAAAA==
' From Name: Chilkat Software
' From Addr: support@chilkatsoft.com
' To Name: chilkatsoft@outlook.com
' To Addr: chilkatsoft@outlook.com
' To Name: admin@chilkat.io
' To Addr: admin@chilkat.io
' Subject: Test HTML email with embedded images.
' Has Attachments:False
' Body Content-Type:html
' ----


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

' {
'   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('chilkatsoft%40outlook.com')/mailFolders('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA%3D')/messages",
'   "value": [
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bb\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA==",
'       "createdDateTime": "2017-05-10T00:27:40Z",
'       "lastModifiedDateTime": "2017-05-10T00:30:51Z",
'       "changeKey": "CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bb",
'       "categories": [
'       ],
'       "receivedDateTime": "2017-05-10T00:27:41Z",
'       "sentDateTime": "2017-05-10T00:27:12Z",
'       "hasAttachments": true,
'       "internetMessageId": "<9a65d233-0882-d346-f405-202a8b1a3acd@chilkatsoft.com>",
'       "subject": "email with attachments",
'       "bodyPreview": "This email has attachments...",
'       "importance": "normal",
'       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA=",
'       "conversationId": "AQQkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAQABQcNI8CG1xKpGjzxJTpoOE=",
'       "isDeliveryReceiptRequested": null,
'       "isReadReceiptRequested": false,
'       "isRead": true,
'       "isDraft": false,
'       "webLink": "https://outlook.live.com/owa/?ItemID=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA%3D%3D&exvsurl=1&viewmodel=ReadMessageItem",
'       "inferenceClassification": "focused",
'       "body": {
'         "contentType": "html",
'         "content": "<html>...</html>\r\n"
'       },
'       "sender": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "from": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "toRecipients": [
'         {
'           "emailAddress": {
'             "name": "Chilkat Software",
'             "address": "chilkatsoft@outlook.com"
'           }
'         }
'       ],
'       "ccRecipients": [
'       ],
'       "bccRecipients": [
'       ],
'       "replyTo": [
'       ]
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bZ\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2gAAAA==",
'       "createdDateTime": "2017-05-10T00:25:28Z",
'       "lastModifiedDateTime": "2017-05-10T00:25:44Z",
'       "changeKey": "CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bZ",
'       "categories": [
'       ],
'       "receivedDateTime": "2017-05-10T00:25:28Z",
'       "sentDateTime": "2017-05-10T00:25:10Z",
'       "hasAttachments": false,
'       "internetMessageId": "<707ff357-28ea-7ebd-9409-f46d752e871f@chilkatsoft.com>",
'       "subject": "Re: Test HTML email with embedded images.",
'       "bodyPreview": "My reply...",
'       "importance": "normal",
'       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA=",
'       "conversationId": "AQQkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAQACYVrc_6yptKn9tuOqBiUMQ=",
'       "isDeliveryReceiptRequested": null,
'       "isReadReceiptRequested": false,
'       "isRead": true,
'       "isDraft": false,
'       "webLink": "https://outlook.live.com/owa/?ItemID=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2gAAAA%3D%3D&exvsurl=1&viewmodel=ReadMessageItem",
'       "inferenceClassification": "focused",
'       "body": {
'         "contentType": "html",
'         "content": "<html>\r\n<head>\r\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n<meta content=\"text/html; charset=utf-8\">\r\n</head>\r\n<body bgcolor=\"#FFFFFF\">...</body>\r\n</html>\r\n"
'       },
'       "sender": {
'         "emailAddress": {
'           "name": "Chilkat Software",
' 
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "from": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "toRecipients": [
'         {
'           "emailAddress": {
'             "name": "Chilkat Software",
'             "address": "chilkatsoft@outlook.com"
'           }
'         },
'         {
'           "emailAddress": {
'             "name": "admin@chilkat.io",
'             "address": "admin@chilkat.io"
'           }
'         }
'       ],
'       "ccRecipients": [
'         {
'           "emailAddress": {
'             "name": "Matt Smith",
'             "address": "chilkat.support@gmail.com"
'           }
'         }
'       ],
'       "bccRecipients": [
'       ],
'       "replyTo": [
'       ]
'     },
'     {
'       "@odata.etag": "W/\"CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bY\"",
'       "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2QAAAA==",
'       "createdDateTime": "2017-05-10T00:22:23Z",
'       "lastModifiedDateTime": "2017-05-10T00:22:45Z",
'       "changeKey": "CQAAABYAAADn68XtMop0TpsYJGpfKXY9AADBQ0bY",
'       "categories": [
'       ],
'       "receivedDateTime": "2017-05-10T00:22:23Z",
'       "sentDateTime": "2017-05-10T00:22:03Z",
'       "hasAttachments": false,
'       "internetMessageId": "<4da724c6-fa94-5516-81d5-9cdf152eddc5@chilkatsoft.com>",
'       "subject": "Test HTML email with embedded images.",
'       "bodyPreview": "This is a test email with images...",
'       "importance": "normal",
'       "parentFolderId": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAuAAADsVyfxjDU406Ic4X7ill8xAEA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAAA=",
'       "conversationId": "AQQkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgAQACYVrc_6yptKn9tuOqBiUMQ=",
'       "isDeliveryReceiptRequested": null,
'       "isReadReceiptRequested": false,
'       "isRead": true,
'       "isDraft": false,
'       "webLink": "https://outlook.live.com/owa/?ItemID=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2QAAAA%3D%3D&exvsurl=1&viewmodel=ReadMessageItem",
'       "inferenceClassification": "focused",
'       "body": {
'         "contentType": "html",
'         "content": "<html>...</html>\r\n"
'       },
'       "sender": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "from": {
'         "emailAddress": {
'           "name": "Chilkat Software",
'           "address": "support@chilkatsoft.com"
'         }
'       },
'       "toRecipients": [
'         {
'           "emailAddress": {
'             "name": "chilkatsoft@outlook.com",
'             "address": "chilkatsoft@outlook.com"
'           }
'         },
'         {
'           "emailAddress": {
'             "name": "admin@chilkat.io",
'             "address": "admin@chilkat.io"
'           }
'         }
'       ],
'       "ccRecipients": [
'         {
'           "emailAddress": {
'             "name": "Matt Smith",
'             "address": "chilkat.support@gmail.com"
'           }
'         }
'       ],
'       "bccRecipients": [
'       ],
'       "replyTo": [
'       ]
'     }
'   ]
' 
' }