public async Task LoadShiftGroupingAsync()
{
IEnumerable <ShiftGrouping> grouping = new ShiftGrouping[0];
var task = Task.Run(() =>
{
lock ( _lock ) {
try {
grouping = _dbContext.GetShiftGrouping().Select(s => new ShiftGrouping(s.shift, s.appointments)).ToArray();
}
catch (Exception ex) {
grouping = new ShiftGrouping[0];
}
}
});
await task;
lock ( _lock ) {
if (_shiftGroupingCollection.Any())
{
_shiftGroupingCollection.Clear();
}
foreach (var shiftGrouping in grouping)
{
_shiftGroupingCollection.Add(shiftGrouping);
}
}
}
public ShiftGroupingViewModel(ShiftGrouping shiftGrouping, ReadOnlyObservableCollection <FilterViewModel> filters)
{
ShiftGrouping = shiftGrouping ?? throw new ArgumentNullException(nameof(shiftGrouping), @"ShiftGroupingVmCollection cannot be null.");
_filterVmCollection = filters ?? throw new ArgumentNullException(nameof(filters), @"filters cannot be null.");
_appointmentGroupingVmCollection = new ObservableCollection <AppointmentGroupingViewModel>(
shiftGrouping.Appointments
.Select(a =>
{
var agvm = new AppointmentGroupingViewModel(a, _filterVmCollection);
agvm.PropertyChanged += OnIsModifyChanged;
return(agvm);
})
);
AppointmentGroupingVmCollection = _appointmentGroupingVmCollection.Where(AppointmentGroupingPredicate).ToArray();
}
