带有OAuth 2.0服务帐户的google calendar v3 api返回空结果

我从带有ServiceAccountCredential的Calendar EventsResource.ListRequest获得零结果。同样的代码也适用于UserCredential。我没有得到任何异常或错误，只有事件。当我尝试使用key.p12文件进行身份验证时，项目计数始终为零

我还在域管理安全设置中为此服务帐户的clientID设置API客户端访问权限

有什么想法吗？谢谢

----------------这是我的密码：

    static UserCredential getUserCredential()
    {
        UserCredential credential;
        using (var stream = new FileStream(@"client_secrets.json", FileMode.Open, FileAccess.Read))
        {
            credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.Load(stream).Secrets,
                new[] { CalendarService.Scope.CalendarReadonly },
                "user", CancellationToken.None, new FileDataStore("carol test")).Result;
        }
        return credential;
    }

    static ServiceAccountCredential getServiceAccountCredential()
    {
        //Google authentication using OAuth for single calendar
        string serviceAccountEmail = "xx...@developer.gserviceaccount.com";            
        var certificate = new X509Certificate2(@"clientPrivateKey.p12", "notasecret",
        X509KeyStorageFlags.Exportable);

        ServiceAccountCredential credential = new ServiceAccountCredential(new
        ServiceAccountCredential.Initializer(serviceAccountEmail)
        {
            Scopes =
                new[] { CalendarService.Scope.Calendar }
        }.FromCertificate(certificate));

        return credential;
    }

    static void Main(string[] args)
    {
        // Create the service.

        BaseClientService.Initializer initializer = new
        BaseClientService.Initializer();
        //initializer.HttpClientInitializer = getUserCredential();
        initializer.HttpClientInitializer = getServiceAccountCredential();
        initializer.ApplicationName = "Google Calendar Sample";
        CalendarService calservice = new CalendarService(initializer);


     List<CalendarEvent> calendarEvents = new List<CalendarEvent>();
        try
        {
            EventsResource.ListRequest req = calservice.Events.List("primary");    // Is it correct to use "primary" as calendarID?
            req.TimeMin = new DateTime(2014, 12, 1);
            req.TimeMax = new DateTime(2014, 12, 6);
            req.SingleEvents = true;
            req.OrderBy = EventsResource.ListRequest.OrderByEnum.StartTime;
            Events events = req.Execute();  // always empty for ServiceAccount auth, but getting results for user credential auth

        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);  // didnot get exception either way
        }

    }

使用service account key.p12 auth时事件的值

{Google.Apis.Calendar.v3.Data.Events}
AccessRole: "owner"
DefaultReminders: Count = 0
Description: null
ETag: "\"1417747728066000\""
Items: Count = 0
Kind: "calendar#events"
NextPageToken: null
NextSyncToken: null
Summary: "xxxx@developer.gserviceaccount.com"
TimeZone: "UTC"
Updated: {12/4/2014 6:48:48 PM}
UpdatedRaw: "2014-12-05T02:48:48.066Z"

---

问题是我的gmail帐户日历没有与我的服务帐户共享。如果我与我的服务帐户手动共享日历，则一切正常。我将创建一个关于如何为服务帐户设置日历域访问权限的新问题。答案如下：

{Google.Apis.Calendar.v3.Data.Events}
AccessRole: "owner"
DefaultReminders: Count = 0
Description: null
ETag: "\"1417747728066000\""
Items: Count = 0
Kind: "calendar#events"
NextPageToken: null
NextSyncToken: null
Summary: "xxxx@developer.gserviceaccount.com"
TimeZone: "UTC"
Updated: {12/4/2014 6:48:48 PM}
UpdatedRaw: "2014-12-05T02:48:48.066Z"