Scheduler - Time Zone Support

The Scheduler allows its users to view appointments in different time zones. Set the timeZone property to specify the current time zone. This property accepts values from the IANA time zone database.

In this demo, you can use the drop-down menu above the Scheduler to choose between the London, Berlin, and Helsinki time zones. To populate the menu, the getTimeZones utility method is used. It returns a list of all IANA time zones that is then filtered.

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Backend API

@model IEnumerable<DevExtreme.NETCore.Demos.Models.Event> <div class="option"> <span>Office Time Zone</span> @(Html.DevExtreme().SelectBox() .Width(240) .InputAttr("aria-label", "Time Zone") .ElementAttr("class", "selectBox") .DisplayExpr("title") .ValueExpr("id") .OnValueChanged("onSelectBoxValueChanged") ) </div> @(Html.DevExtreme().Scheduler() .DataSource(Model) .StartDateExpr("StartDate") .EndDateExpr("EndDate") .TextExpr("Text") .RecurrenceRuleExpr("RecurrenceRule") .Views(new[] { SchedulerViewType.WorkWeek }) .CurrentView(SchedulerViewType.WorkWeek) .CurrentDate(new DateTime(2021, 4, 27)) .StartDayHour(8) .Height(600) .Editing(e => e.AllowTimeZoneEditing(true)) .ElementAttr("class", "scheduler") .OnOptionChanged("onSchedulerOptionChanged") .OnAppointmentFormOpening("onAppointmentFormOpening") ) <script> const getLocations = function(date) { const timeZones = DevExpress.utils.getTimeZones(date); return timeZones.filter(function(timeZone) { return locations.indexOf(timeZone.id) !== -1; }); }; const locations = ["Europe/London", "Europe/Berlin", "Europe/Helsinki"]; const currentDate = new Date(2021, 4, 25); const demoLocations = getLocations(currentDate); function onSelectBoxValueChanged(e) { getScheduler().option("timeZone", e.value); } function onSchedulerOptionChanged(e) { if (e.name === "currentDate") { getSelectBox().option("items", getLocations(e.value)); } } function onAppointmentFormOpening(e) { const form = e.form; const startDateTimezoneEditor = form.getEditor("startDateTimeZone"); const endDateTimezoneEditor = form.getEditor("endDateTimeZone"); const startDatedataSource = startDateTimezoneEditor.option("dataSource"); const endDateDataSource = endDateTimezoneEditor.option("dataSource"); startDatedataSource.filter(["id", "contains", "Europe"]); endDateDataSource.filter(["id", "contains", "Europe"]); startDatedataSource.load(); endDateDataSource.load(); } function getSelectBox() { return $(".selectBox").dxSelectBox("instance"); } function getScheduler() { return $(".scheduler").dxScheduler("instance"); } $(function () { const selectBox = getSelectBox(); selectBox.option("items", demoLocations); selectBox.option("value", demoLocations[0].id); const scheduler = getScheduler(); scheduler.option("timeZone", demoLocations[0].id); }) </script>

using DevExtreme.NETCore.Demos.Models.SampleData; using DevExtreme.NETCore.Demos.ViewModels; using Microsoft.AspNetCore.Mvc; using System; using System.Collections.Generic; using System.Linq; namespace DevExtreme.NETCore.Demos.Controllers { public class SchedulerController : Controller { public ActionResult TimeZonesSupport() { return View(SampleData.Events); } } }

namespace DevExtreme.NETCore.Demos.Models { public class Event { public string Text { get; set; } public string StartDate { get; set; } public string EndDate { get; set; } public string RecurrenceRule { get; set; } public string StartDateTimeZone { get; set; } public string EndDateTimeZone { get; set; } } }

using System.Collections.Generic; namespace DevExtreme.NETCore.Demos.Models.SampleData { public partial class SampleData { public static readonly IEnumerable<Event> Events = new[] { new Event { Text = "Stand-up meeting", StartDate = "2021-04-26T15:30:00.000Z", EndDate = "2021-04-26T15:45:00.000Z", RecurrenceRule = "FREQ=DAILY" }, new Event { Text = "Book Flights to San Fran for Sales Trip", StartDate = "2021-04-28T18:00:00.000Z", EndDate = "2021-04-28T19:00:00.000Z" }, new Event { Text = "New Brochures", StartDate = "2021-04-30T18:30:00.000Z", EndDate = "2021-04-30T18:45:00.000Z" }, new Event { Text = "Website Re-Design Plan", StartDate = "2021-04-27T12:30:00.000Z", EndDate = "2021-04-27T13:30:00.000Z" }, new Event { Text = "Book Flights to San Fran for Sales Trip", StartDate = "2021-04-28T16:00:00.000Z", EndDate = "2021-04-28T15:00:00.000Z" }, new Event { Text = "Prepare 2021 Marketing Plan", StartDate = "2021-04-26T07:00:00.000Z", EndDate = "2021-04-26T09:30:00.000Z" }, new Event { Text = "Launch New Website", StartDate = "2021-04-28T08:00:00.000Z", EndDate = "2021-04-28T10:00:00.000Z" }, new Event { Text = "Submit New Website Design", StartDate = "2021-04-29T09:30:00.000Z", EndDate = "2021-04-29T11:00:00.000Z" }, new Event { Text = "Upgrade Server Hardware", StartDate = "2021-04-30T06:30:00.000Z", EndDate = "2021-04-30T08:00:00.000Z" }, new Event { Text = "Approve New Online Marketing Strategy", StartDate = "2021-04-30T11:00:00.000Z", EndDate = "2021-04-30T12:30:00.000Z" }, new Event { Text = "Final Budget Review", StartDate = "2021-04-27T09:00:00.000Z", EndDate = "2021-04-27T10:35:00.000Z" } }; } }

.option { display: flex; } .option > span { display: flex; align-items: center; margin-right: 10px; } .dx-scheduler { margin-top: 20px; }

Users can edit the time zones of individual appointments in the appointment details form. To enable this functionality, set the editing.allowTimeZoneEditing property to true. Information about individual time zones is saved in the startDateTimeZone and endDateTimeZone fields of the appointment data objects.