public DxSchedulerMapping ResourceId { get; set; }

<DxScheduler StartDate="@DateTime.Today"
             DataStorage="@DataStorage"
             GroupType="@SchedulerGroupType.Resource" >
    <DxSchedulerDayView DayCount="2" ShowWorkTimeOnly="true"></DxSchedulerDayView>
</DxScheduler>

@code {
    DxSchedulerDataStorage DataStorage = new DxSchedulerDataStorage() {
        AppointmentsSource = ResourceAppointmentCollection.GetAppointmentsForGrouping(),
        AppointmentMappings = new DxSchedulerAppointmentMappings() {
            Type = "AppointmentType",
            Start = "StartDate",
            End = "EndDate",
            Subject = "Caption",
            AllDay = "AllDay",
            Location = "Location",
            Description = "Description",
            LabelId = "Label",
            StatusId = "Status",
            RecurrenceInfo = "Recurrence",
            ResourceId = "ResourceId"
        },
        ResourcesSource = ResourceAppointmentCollection.GetResourcesForGrouping(),
        ResourceMappings = new DxSchedulerResourceMappings() {
            Id = "Id",
            Caption = "Text",
            BackgroundCssClass = "BackgroundCss",
            TextCssClass = "TextCss"
        }
    };
}