[英]Xamarin.Forms C# property not updating in Device.StartTimer
[英]Set reminder on device calendar using xamarin.forms cross platform C#
使用Xamarin.forms交叉平台c#,使用XamForms.Controls.Calendar插件在事件添加和日历节目中设置设备日历上的提醒,但现在我想使用跨平台在xamarin表单中设置特定设备日历的提醒
您不能直接从Xamarin.Forms项目使用/访问日历,因为您需要使用DependancyService,并且需要为每个平台编写代码。 我附上代码以供参考。
Windows // https://msdn.microsoft.com/en-us/library/windows/apps/xaml/dn495339.aspx
public async Task AddAppointment(ESF.Core.Models.ESFPortal_Events appointment)
{
var appointmentRcd = new Windows.ApplicationModel.Appointments.Appointment();
var date = appointment.ExpireDate.Value.Date;
var time = appointment.ExpireDate.Value.TimeOfDay;
var timeZoneOffset = TimeZoneInfo.Local.GetUtcOffset(DateTime.Now);
var startTime = new DateTimeOffset(date.Year, date.Month, date.Day, time.Hours, time.Minutes, 0, timeZoneOffset);
appointmentRcd.StartTime = startTime;
// Subject
appointmentRcd.Subject = appointment.Title;
// Location
appointmentRcd.Location = appointment.WhereWhen;
// Details
appointmentRcd.Details = appointment.Description;
// Duration
appointmentRcd.Duration = TimeSpan.FromHours(1);
// All Day
appointmentRcd.AllDay = false;
//Busy Status
appointmentRcd.BusyStatus = Windows.ApplicationModel.Appointments.AppointmentBusyStatus.Busy;
// Sensitivity
appointmentRcd.Sensitivity = Windows.ApplicationModel.Appointments.AppointmentSensitivity.Public;
Rect rect = new Rect(new Point(10, 10), new Size(100, 200));
string retVal = await AppointmentManager.ShowAddAppointmentAsync(appointmentRcd, rect, Windows.UI.Popups.Placement.Default);
return !string.IsNullOrEmpty(retVal);
}
Android // http://developer.xamarin.com/guides/android/user_interface/calendar/ - 还使用Android Docs进一步了解变量
public async Task<bool> AddAppointment(ESF.Core.Models.ESFPortal_Events appointment)
{
Intent intent = new Intent(Intent.ActionInsert);
intent.PutExtra(CalendarContract.Events.InterfaceConsts.Title, appointment.Title);
intent.PutExtra(CalendarContract.Events.InterfaceConsts.Description, appointment.WhereWhen + " " + appointment.Description);
intent.PutExtra(CalendarContract.Events.InterfaceConsts.Dtstart, GetDateTimeMS(appointment.ExpireDate.Value));
intent.PutExtra(CalendarContract.Events.InterfaceConsts.Dtend, GetDateTimeMS(appointment.ExpireDate.Value.AddHours(1)));
intent.PutExtra(CalendarContract.ExtraEventBeginTime, GetDateTimeMS(appointment.ExpireDate.Value));
intent.PutExtra(CalendarContract.ExtraEventEndTime , GetDateTimeMS(appointment.ExpireDate.Value.AddHours(1)));
intent.PutExtra(CalendarContract.Events.InterfaceConsts.EventTimezone, "UTC");
intent.PutExtra(CalendarContract.Events.InterfaceConsts.EventEndTimezone, "UTC");
intent.SetData(CalendarContract.Events.ContentUri);
((Activity)Forms.Context).StartActivity(intent);
return true;
}
IOS // http://developer.xamarin.com/guides/ios/platform_features/introduction_to_event_kit/
protected EKEventStore eventStore;
public AppointmentServiceh_iOS()
{
eventStore = new EKEventStore();
}
public async Task<bool> AddAppointment(ESF.Core.Models.ESFPortal_Events appointment)
{
var granted = await eventStore.RequestAccessAsync(EKEntityType.Event);//, (bool granted, NSError e) =>
if (granted.Item1)
{
EKEvent newEvent = EKEvent.FromStore(eventStore);
newEvent.StartDate = DateTimeToNSDate(appointment.ExpireDate.Value);
newEvent.EndDate = DateTimeToNSDate(appointment.ExpireDate.Value.AddHours(1));
newEvent.Title = appointment.Title;
newEvent.Notes = appointment.WhereWhen;
newEvent.Calendar = eventStore.DefaultCalendarForNewEvents;
NSError e;
eventStore.SaveEvent(newEvent, EKSpan.ThisEvent, out e);
return true;
}
else
{
new UIAlertView("Access Denied", "User Denied Access to Calendar Data", null, "ok", null).Show();
return false;
}
}
public DateTime NSDateToDateTime(NSDate date)
{
double secs = date.SecondsSinceReferenceDate;
if (secs < -63113904000)
return DateTime.MinValue;
if (secs > 252423993599)
return DateTime.MaxValue;
return (DateTime)date;
}
public NSDate DateTimeToNSDate(DateTime date)
{
if (date.Kind == DateTimeKind.Unspecified)
date = DateTime.SpecifyKind(date, DateTimeKind.Local);
return (NSDate)date;
}
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