// Data context
public class SchedulingDataContext : DbContext {
public SchedulingDataContext() : base(CreateConnection(), true) { }
static DbConnection CreateConnection() {
//...
// Data items
public DbSet<AppointmentEntity> AppointmentEntities { get; set; }
//...
// Event implementation
void dataSource_FetchAppointments(object sender, DevExpress.Xpf.Scheduling.FetchDataEventArgs e) {
// Pass data objects to the event's Result property
e.Result = dbContext.AppointmentEntities.Where(
// The search query.
// Use the item's QueryStart and QueryEnd properties to calculate the correct interval
// as they take recurrence patterns into account.
// The event's Interval property returns the time interval for which to load data objects.
// Its value is the SchedulerControl.VisibleIntervals extended to the DataSource.FetchRange property value in both directions.
x => x.QueryStart <= e.Interval.End && x.QueryEnd >= e.Interval.Start)
.ToArray();
void FetchAppointments(FetchDataEventArgs e) {
e.Result = dbContext.AppointmentEntities
.Where(e.GetFetchExpression<AppointmentEntity>()).ToArray();
<dxsch:SchedulerControl
AppointmentAdded="ProcessChanges"
AppointmentEdited="ProcessChanges"
AppointmentRemoved="ProcessChanges"
AppointmentRestored="ProcessChanges"/>
void ProcessChanges(object sender, AppointmentCRUDEventArgs e) {
db.Appointments.AddRange(e.AddToSource.Select(x => (Appointment)x.SourceObject));
db.Appointments.RemoveRange(e.DeleteFromSource.Select(x => (Appointment)x.SourceObject));
db.SaveChanges();
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