CODEWITHSUNDEEP
timezonemicrosoft-graph-api
Emaborsa
Emaborsa

Reputation: 2860

Microsoft Graph API and events start and end dates

I am working with the Graph API and trying to create events using the C# Microsoft.Graph API. Let's assume to have the following Microsoft.Graph.Event objects:

{
  Subject = "A Title",
  Body = new ItemBody(),
  Start = {
    DateTime = "2022-10-24T00:00:00",
    TimeZone = "W. Europe Standard Time"
  },
  End ={
    DateTime = "2022-10-25T00:00:00",
    TimeZone = "W. Europe Standard Time"
  },
  IsAllDay = true,
},{
  Subject = "B Title",
  Body = new ItemBody(),
  Start = new DateTimeTimeZone {
    DateTime = "2022-10-28T13:30:00",
    TimeZone = "W. Europe Standard Time"
  },
  End = new DateTimeTimeZone {
    DateTime = "2022-10-28T16:45:00",
    TimeZone = "W. Europe Standard Time"
  },
  IsAllDay = false,
}

They are successfully written into my calendar trough twice call to:

await _graphServiceClient.Users[emailAddress].Events.Request().AddAsync(graphEvent);

and I see:

enter image description here

and

enter image description here

which is the expected behaviour.

Querying the API with the filter "start/dateTime ge '2022-10-24T00:00:00'" I get just B Title, A Title is missing. Furthermore the start and end dates are wrong, I get 2022-10-28T11:30:00.0000000 and 2022-10-28T14:45:00.0000000. If I edit the query to "start/dateTime ge '2022-10-23T00:00:00'" I get both, the dates of B title are the same (wrong), but the ones of A Title ar correct 2022-10-24T00:00:00.0000000 and 2022-10-25T00:00:00.0000000.

I expected that B Title has 2022-10-28T13:30:00.0000000 and 2022-10-28T16:45:00.0000000. What am I doing wrong?

Upvotes: 0

Views: 1568

Answers (1)

user2250152
user2250152

Reputation: 20660

When you call list events endpoint you can specify request header Prefer: outlook.timezone="<time-zone>". If not specified, those time values are returned in UTC.

Example:

var events = await _graphServiceClient.Users[emailAddress]
    .Events
    .Request()
    .Header("Prefer","outlook.timezone=\"W. Europe Standard Time\"")
    .GetAsync();

I guess that with the correct outlook.timezone header your query will return also A Title and correct time values.

References:

Calendar list events - request headers

Upvotes: 1

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