(VB.NET) Outlook Calendar Create an Event

See more Outlook Calendar Examples

Create an event in the specified time zone, and assign the event an optional transactionId value.

For more information, see https://docs.microsoft.com/en-us/graph/api/user-post-events?view=graph-rest-1.0&tabs=http#example-1-create-an-event-in-the-specified-time-zone-and-assign-the-event-an-optional-transactionid-value

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' 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: Get Outlook Calendar OAuth2 Access Token (Azure AD v2.0 Endpoint).

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

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

' Send the following POST:

' POST https://graph.microsoft.com/v1.0/me/events
' Prefer: outlook.timezone="Pacific Standard Time"
' Content-type: application/json
' 
' {
'   "subject": "Let's go for lunch",
'   "body": {
'     "contentType": "HTML",
'     "content": "Does noon work for you?"
'   },
'   "start": {
'       "dateTime": "2017-04-15T12:00:00",
'       "timeZone": "Pacific Standard Time"
'   },
'   "end": {
'       "dateTime": "2017-04-15T14:00:00",
'       "timeZone": "Pacific Standard Time"
'   },
'   "location":{
'       "displayName":"Harry's Bar"
'   },
'   "attendees": [
'     {
'       "emailAddress": {
'         "address":"samanthab@contoso.onmicrosoft.com",
'         "name": "Samantha Booth"
'       },
'       "type": "required"
'     }
'   ],
'   "allowNewTimeProposals": true,
'   "transactionId":"7E163156-7762-4BEB-A1C6-729EA81755A7"
' }

' Build the JSON body of the POST.
Dim json As New Chilkat.JsonObject
json.UpdateString("subject","Let's go for lunch")
json.UpdateString("body.contentType","HTML")
json.UpdateString("body.content","Does noon work for you?")
json.UpdateString("start.dateTime","2021-05-15T12:00:00")
json.UpdateString("start.timeZone","Pacific Standard Time")
json.UpdateString("end.dateTime","2021-05-15T14:00:00")
json.UpdateString("end.timeZone","Pacific Standard Time")
json.UpdateString("location.displayName","Harry's Bar")
json.UpdateString("attendees[0].emailAddress.address","samanthab@contoso.onmicrosoft.com")
json.UpdateString("attendees[0].emailAddress.name","Samantha Booth")
json.UpdateString("attendees[0].type","required")
json.UpdateBool("allowNewTimeProposals",True)

' Generate a UUID.
Dim crypt As New Chilkat.Crypt2
json.UpdateString("transactionId",crypt.GenerateUuid())

' Add the "Prefer" request header.
http.SetRequestHeader("Prefer","outlook.timezone=""Pacific Standard Time""")

' Send the HTTP POST
Dim resp As Chilkat.HttpResponse = http.PostJson2("https://graph.microsoft.com/v1.0/me/events","application/json",json.Emit())
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("Response status code = " & resp.StatusCode)

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



' The send succeeded if the response status code = 201.
If (resp.StatusCode <> 201) Then
    Debug.WriteLine("Failed")
    Exit Sub
End If


' Sample JSON response:
' (Sample code for parsing the JSON response is shown below)

' {
'   "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('user%40example.com')/events/$entity",
'   "@odata.etag": "W/\"5+vF7TKKdE6bGCRqXyl2PQAEaGQgcw==\"",
'   "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAgENAAAA5_vF7TKKdE6bGCRqXyl2PQAEaDkEcAAAAA==",
'   "createdDateTime": "2021-04-18T23:38:52.1979259Z",
'   "lastModifiedDateTime": "2021-04-18T23:38:53.3747647Z",
'   "changeKey": "5+vF7TKKdE6bGCRqXyl2PQAEaGQgcw==",
'   "categories": [
'   ],
'   "transactionId": "1d12b565-3ca3-4ed8-b3f9-e8a14ac3ac17",
'   "originalStartTimeZone": "Pacific Standard Time",
'   "originalEndTimeZone": "Pacific Standard Time",
'   "iCalUId": "040000008200E00074C5B7101A82E00800000000EF0328FDAB34D7010000000000000000100000004478DD5948382543AFD1B52C25E88C02",
'   "reminderMinutesBeforeStart": 15,
'   "isReminderOn": true,
'   "hasAttachments": false,
'   "subject": "Let's go for lunch",
'   "bodyPreview": "Does noon work for you?",
'   "importance": "normal",
'   "sensitivity": "normal",
'   "isAllDay": false,
'   "isCancelled": false,
'   "isOrganizer": true,
'   "responseRequested": true,
'   "seriesMasterId": null,
'   "showAs": "busy",
'   "type": "singleInstance",
'   "webLink": "https://outlook.live.com/owa/?itemid=AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5%2BvF7TKKdE6bGCRqXyl2PQAAAgENAAAA5%2BvF7TKKdE6bGCRqXyl2PQAEaDkEcAAAAA%3D%3D&exvsurl=1&path=/calendar/item",
'   "onlineMeetingUrl": null,
'   "isOnlineMeeting": false,
'   "onlineMeetingProvider": "unknown",
'   "allowNewTimeProposals": true,
'   "isDraft": false,
'   "hideAttendees": false,
'   "recurrence": null,
'   "onlineMeeting": null,
'   "responseStatus": {
'     "response": "organizer",
'     "time": "0001-01-01T00:00:00Z"
'   },
'   "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=us-ascii\">\r\n</head>\r\n<body>\r\nDoes noon work for you?\r\n</body>\r\n</html>\r\n"
'   },
'   "start": {
'     "dateTime": "2021-05-15T12:00:00.0000000",
'     "timeZone": "Pacific Standard Time"
'   },
'   "end": {
'     "dateTime": "2021-05-15T14:00:00.0000000",
'     "timeZone": "Pacific Standard Time"
'   },
'   "location": {
'     "displayName": "Harry's Bar",
'     "locationType": "default",
'     "uniqueId": "Harry's Bar",
'     "uniqueIdType": "private"
'   },
'   "locations": [
'     {
'       "displayName": "Harry's Bar",
'       "locationType": "default",
'       "uniqueId": "Harry's Bar",
'       "uniqueIdType": "private"
'     }
'   ],
'   "attendees": [
'     {
'       "type": "required",
'       "status": {
'         "response": "none",
'         "time": "0001-01-01T00:00:00Z"
'       },
'       "emailAddress": {
'         "name": "Samantha Booth",
'         "address": "samanthab@contoso.onmicrosoft.com"
'       }
'     }
'   ],
'   "organizer": {
'     "emailAddress": {
'       "name": "John Doe",
'       "address": "outlook_3A33FCEB9B74CC15@outlook.com"
'     }
'   }
' }

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



Dim displayName As String
Dim locationType As String
Dim uniqueId As String
Dim uniqueIdType As String
Dim statusResponse As String
Dim statusTime As String
Dim emailAddressName As String
Dim emailAddressAddress As String

Dim odata_context As String = jResp.StringOf("""@odata.context""")
Dim odata_etag As String = jResp.StringOf("""@odata.etag""")
Dim id As String = jResp.StringOf("id")
Dim createdDateTime As String = jResp.StringOf("createdDateTime")
Dim lastModifiedDateTime As String = jResp.StringOf("lastModifiedDateTime")
Dim changeKey As String = jResp.StringOf("changeKey")
Dim transactionId As String = jResp.StringOf("transactionId")
Dim originalStartTimeZone As String = jResp.StringOf("originalStartTimeZone")
Dim originalEndTimeZone As String = jResp.StringOf("originalEndTimeZone")
Dim iCalUId As String = jResp.StringOf("iCalUId")
Dim reminderMinutesBeforeStart As Integer = jResp.IntOf("reminderMinutesBeforeStart")
Dim isReminderOn As Boolean = jResp.BoolOf("isReminderOn")
Dim hasAttachments As Boolean = jResp.BoolOf("hasAttachments")
Dim subject As String = jResp.StringOf("subject")
Dim bodyPreview As String = jResp.StringOf("bodyPreview")
Dim importance As String = jResp.StringOf("importance")
Dim sensitivity As String = jResp.StringOf("sensitivity")
Dim isAllDay As Boolean = jResp.BoolOf("isAllDay")
Dim isCancelled As Boolean = jResp.BoolOf("isCancelled")
Dim isOrganizer As Boolean = jResp.BoolOf("isOrganizer")
Dim responseRequested As Boolean = jResp.BoolOf("responseRequested")
Dim seriesMasterId As String = jResp.StringOf("seriesMasterId")
Dim showAs As String = jResp.StringOf("showAs")
Dim v_type As String = jResp.StringOf("type")
Dim webLink As String = jResp.StringOf("webLink")
Dim onlineMeetingUrl As String = jResp.StringOf("onlineMeetingUrl")
Dim isOnlineMeeting As Boolean = jResp.BoolOf("isOnlineMeeting")
Dim onlineMeetingProvider As String = jResp.StringOf("onlineMeetingProvider")
Dim allowNewTimeProposals As Boolean = jResp.BoolOf("allowNewTimeProposals")
Dim isDraft As Boolean = jResp.BoolOf("isDraft")
Dim hideAttendees As Boolean = jResp.BoolOf("hideAttendees")
Dim recurrence As String = jResp.StringOf("recurrence")
Dim onlineMeeting As String = jResp.StringOf("onlineMeeting")
Dim responseStatusResponse As String = jResp.StringOf("responseStatus.response")
Dim responseStatusTime As String = jResp.StringOf("responseStatus.time")
Dim bodyContentType As String = jResp.StringOf("body.contentType")
Dim bodyContent As String = jResp.StringOf("body.content")
Dim startDateTime As String = jResp.StringOf("start.dateTime")
Dim startTimeZone As String = jResp.StringOf("start.timeZone")
Dim endDateTime As String = jResp.StringOf("end.dateTime")
Dim endTimeZone As String = jResp.StringOf("end.timeZone")
Dim locationDisplayName As String = jResp.StringOf("location.displayName")
Dim locationLocationType As String = jResp.StringOf("location.locationType")
Dim locationUniqueId As String = jResp.StringOf("location.uniqueId")
Dim locationUniqueIdType As String = jResp.StringOf("location.uniqueIdType")
Dim organizerEmailAddressName As String = jResp.StringOf("organizer.emailAddress.name")
Dim organizerEmailAddressAddress As String = jResp.StringOf("organizer.emailAddress.address")
Dim i As Integer = 0
Dim count_i As Integer = jResp.SizeOfArray("categories")
While i < count_i
    jResp.I = i
    i = i + 1
End While
i = 0
count_i = jResp.SizeOfArray("locations")
While i < count_i
    jResp.I = i
    displayName = jResp.StringOf("locations[i].displayName")
    locationType = jResp.StringOf("locations[i].locationType")
    uniqueId = jResp.StringOf("locations[i].uniqueId")
    uniqueIdType = jResp.StringOf("locations[i].uniqueIdType")
    i = i + 1
End While
i = 0
count_i = jResp.SizeOfArray("attendees")
While i < count_i
    jResp.I = i
    v_type = jResp.StringOf("attendees[i].type")
    statusResponse = jResp.StringOf("attendees[i].status.response")
    statusTime = jResp.StringOf("attendees[i].status.time")
    emailAddressName = jResp.StringOf("attendees[i].emailAddress.name")
    emailAddressAddress = jResp.StringOf("attendees[i].emailAddress.address")
    i = i + 1
End While


Debug.WriteLine("Event created.")