private void RefreshClients(System.Action callback = null)
{
//potentially time consuming loading
Task.Run(() =>
{
lock (_syncRoot)
{
Clients.Clear();
}
using (IDataContextWrapper dataContext = _dataContextLocator())
{
var clientsList = dataContext.Table <Client>().AsEnumerable();
clientsList.Apply(c =>
{
if (c.Longitude != null && c.Latitude != null)
{
c.Distance = geoLocation.CalculateDistance(currentPosition, (double)c.Latitude, (double)c.Longitude);
}
});
if (BeginDate.Ticks > 0)
{
clientsList = clientsList.Where(c => c.Birthdate >= BeginDate);
}
if (EndDate.Ticks > 0)
{
clientsList = clientsList.Where(c => c.Birthdate <= EndDate);
}
if (Distance < Int32.MaxValue)
{
clientsList = clientsList.Where(c => c.Distance <= Distance);
}
lock (_syncRoot)
{
Clients = new BindableCollection <Client>(clientsList);
if (callback != null)
{
callback();
}
}
}
});
}