DxScheduler.AppointmentRemoved Event

Fires after an appointment is removed from the AppointmentsSource object.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public EventCallback<DxSchedulerAppointmentItem> AppointmentRemoved { get; set; }

Parameters

Type	Description
DxSchedulerAppointmentItem	A DxSchedulerAppointmentItem object that stores a removed appointment.

Remarks

Use the AppointmentRemoved event to get information about a removed appointment after it has been deleted from the AppointmentsSource object.

Note

To cancel an appointment removal in code, use the AppointmentRemoving event.

The following code snippet does the following:

• Creates a DxSchedulerDataStorage object, sets its AppointmentsSource to null.
• Assigns the created data storage object to the Scheduler’s DataStorage property.
• In the OnInitialized lifecycle method, creates a new DbContext and loads data from the DbContext to the DxSchedulerDataStorage.AppointmentsSource property.

• Handles AppointmentInserted, AppointmentUpdated, and AppointmentRemoved events to implement CRUD operations in the Scheduler. To access a target appointment, the SourceObject property is used.

  You can also use AppointmentInserting, AppointmentUpdating, and AppointmentRemoving events to implement CRUD operations. These events fire before modifications are applied to Scheduler’s appointment collection. You can access the database or service and validate that an appointment was in fact inserted/updated/removed. If validation is successful, pass the appointment further. If not, set the event argument’s Cancel property to true and display an error message (the service is unavailable or the appointment conflicts with another appointment in the database).

• Uses the DbContext.Dispose method to track the context for the component lifetime.

@inject IDbContextFactory<MedicsSchedulingContext> MedicsSchedulingContextFactory
@implements IDisposable

<DxScheduler StartDate="@startDate"
             DataStorage="@DataStorage"
             AppointmentUpdated="@AppointmentUpdated"
             AppointmentInserted="@AppointmentInserted"
             AppointmentRemoved="@AppointmentRemoved"
             GroupType="SchedulerGroupType.Resource">
    <DxSchedulerDayView DayCount="1" ShowWorkTimeOnly="true"></DxSchedulerDayView>
    ...
        <Scales>
            <DxSchedulerTimeScale Unit="@SchedulerTimeScaleUnit.Day" UnitCount="1"></DxSchedulerTimeScale>
            <DxSchedulerTimeScale Unit="@SchedulerTimeScaleUnit.Hour" UnitCount="2"></DxSchedulerTimeScale>
        </Scales>
    </DxSchedulerTimelineView>
</DxScheduler>

@code {
    DateTime startDate { get; set; } = new DateTime(2016, 10, 10);
    MedicsSchedulingContext dbContext { get; set; }

    DxSchedulerDataStorage DataStorage = new DxSchedulerDataStorage() {
            AppointmentsSource = null,
            AppointmentMappings = new DxSchedulerAppointmentMappings() {
                Id = "Id",
                Type = "EventType",
                Start = "StartTime",
                End = "EndTime",
                Subject = "Subject",
                AllDay = "AllDay",
                Location = "Location",
                Description = "Description",
                LabelId = "Label",
                StatusId = "Status",
                ResourceId = "MedicId",
                RecurrenceInfo = "RecurrenceInfo"
            },
            ResourcesSource = null,
            ResourceMappings = new DxSchedulerResourceMappings() {
                Id = "Id",
                Caption = "DisplayName"
            }
        };

    protected override void OnInitialized() {
        dbContext = MedicsSchedulingContextFactory.CreateDbContext();
        DataStorage.AppointmentsSource = dbContext.MedicalAppointments.ToList();
        DataStorage.ResourcesSource = dbContext.Medics.ToList();
    }

    void AppointmentInserted(DxSchedulerAppointmentItem e) {
        dbContext.Add(e.SourceObject);
        dbContext.SaveChanges();
    }

    void AppointmentUpdated(DxSchedulerAppointmentItem e) {
        dbContext.SaveChanges();
    }

    void AppointmentRemoved(DxSchedulerAppointmentItem e) {
        dbContext.Remove(e.SourceObject);
        dbContext.SaveChanges();
    }

    public void Dispose() {
        dbContext?.Dispose();
    }
}