Google Calendar Event Not Showing in Calendar

Question

We have created a Service Account in Google and Using Calendar API for adding events, it worked fine before ,after google stopped the account and reactivated it , it didn't work

We have tried new service account and debugged line by line of our code and no error and also returning created events but not showing in calendar

        CalendarService service = null;
        var serviceAccountCredentialFilePath = 
        Path.Combine(AppDomain.CurrentDomain.BaseDirectory, 
        "ServiceAccount_Key.json");
        if (Path.GetExtension(serviceAccountCredentialFilePath).ToLower() 
        == ".json")
        {
            GoogleCredential credential;

            string[] scopes = new string[] {
                CalendarService.Scope.Calendar, // Manage your calendars
                CalendarService.Scope.CalendarReadonly // View your Calendars
             };
            using (var stream = new FileStream(serviceAccountCredentialFilePath, FileMode.Open, FileAccess.Read))
            {
                credential = GoogleCredential.FromStream(stream)
                     .CreateScoped(scopes);
            }
            // Create the service.
            service = new CalendarService(new BaseClientService.Initializer
            {
                HttpClientInitializer = credential,
                ApplicationName = "Esoco"
            });
        }
        // End //

        // Insert Event //
        var myEvent = new Event
        {
            Id = guid,
            //Transparency =  "OPAQUE",
            Summary = subject,
            Location = location,
            Start = new EventDateTime { TimeZone = timezone, DateTime = start },
            End = new EventDateTime { TimeZone = timezone, DateTime = end },
            Attendees = objattendees,
            Organizer = organizerdata,
            Description = summary,

        };

        myEvent.Start.DateTimeRaw = myEvent.Start.DateTimeRaw.Replace("Z", "");
        myEvent.End.DateTimeRaw = myEvent.End.DateTimeRaw.Replace("Z", "");

        //myEvent.ICalUID

        var recurringEvent = service.Events.Insert(myEvent, "primary");
        recurringEvent.SendNotifications = true;
        try
        {
            var outputofevent = recurringEvent.Execute();
            ScriptManager.RegisterClientScriptBlock(this, typeof(string), "Alertscript", "alert('"+outputofevent.Status+"')", true);
        }

Expected Result is Inserted Event Display in Calendar but Actual Result is Not Displayed in Calendar

Answer 1

remember that the following code inserts your events into the service accounts primary calendar

var recurringEvent = service.Events.Insert(myEvent, "primary");

In order to see these events you will need to either do an events.list or invite someone else to the event so that they can see it in their own calendar.

Bug issue logged.

Beyond that there is currently an issue on the forums about invites not being sent https://issuetracker.google.com/issues/140746812

Answer 2

In the past few weeks, my team have the same issues, and this is what my team's workaround.

Our scenario

1. We create a service account called google-calendar@mycompany.iam.gserviceaccount.com
2. We using service account's credential from 1) for Google Calendar API
3. Create an event into a service account's calendar like the code below

calendar.events.insert({
  calendarId: 'primary', // it will create an event into service account's calendar
  resource: data,
  sendNotifications: true
})

---

What we have done for a workaround.

1. Create a new company's user (let's say system@mycompany.com )
2. Share system@mycompany.com 's calendar with a service account by
   • going to "Calendar > Settings > Share with specific people" then
   • adding google-calendar@mycompany.iam.gserviceaccount.com with "Make changes to events"
3. Update the code from creating an event to service account's calendar to just-created-user's calendar like a below

calendar.events.insert({
  calendarId: 'system@mycompany.com', // << we changed from 'primary' to just-created-user
  resource: data,
  sendNotifications: true
})

After changing it, the created-event will be shown in Google Calendar as what it should.

Hope this helps