public WeatherForecastAnnotation[] GetForecastAnnotations(MKCoordinateRegion region, int maxCount)
{
double longMin = region.Center.Longitude - region.Span.LongitudeDelta / 2.0;
double longMax = region.Center.Longitude + region.Span.LongitudeDelta / 2.0;
double latMin = region.Center.Latitude - region.Span.LatitudeDelta / 2.0;
double latMax = region.Center.Latitude + region.Span.LatitudeDelta / 2.0;
// Query for WeatherForecasts within our specified region
var results = from item in store.Table <WeatherForecast> ()
where (item.Latitude > latMin && item.Latitude <latMax && item.Longitude> longMin && item.Longitude < longMax)
orderby item.Latitude
orderby item.Longitude
select item;
// Iterate over the results and add them to a list
var list = new List <WeatherForecastAnnotation> ();
foreach (var forecast in results)
{
list.Add(new WeatherForecastAnnotation(forecast));
}
if (list.Count <= maxCount)
{
// We got fewer results than the max, so just return what we found
return(list.ToArray());
}
// Calculate a stride so we can get an evenly distributed sampling of the results
double index = 0.0, stride = (double)(list.Count - 1) / (double)maxCount;
var annotations = new WeatherForecastAnnotation [maxCount];
for (int i = 0; i < maxCount && (int)index < list.Count; i++, index += stride)
{
annotations[i] = list[(int)index];
}
return(annotations);
}
public WeatherForecastAnnotation[] GetForecastAnnotations (MKCoordinateRegion region, int maxCount)
{
double longMin = region.Center.Longitude - region.Span.LongitudeDelta / 2.0;
double longMax = region.Center.Longitude + region.Span.LongitudeDelta / 2.0;
double latMin = region.Center.Latitude - region.Span.LatitudeDelta / 2.0;
double latMax = region.Center.Latitude + region.Span.LatitudeDelta / 2.0;
// Query for WeatherForecasts within our specified region
var results = from item in store.Table<WeatherForecast> ()
where (item.Latitude > latMin && item.Latitude < latMax && item.Longitude > longMin && item.Longitude < longMax)
orderby item.Latitude
orderby item.Longitude
select item;
// Iterate over the results and add them to a list
var list = new List<WeatherForecastAnnotation> ();
foreach (var forecast in results)
list.Add (new WeatherForecastAnnotation (forecast));
if (list.Count <= maxCount) {
// We got fewer results than the max, so just return what we found
return list.ToArray ();
}
// Calculate a stride so we can get an evenly distributed sampling of the results
double index = 0.0, stride = (double) (list.Count - 1) / (double) maxCount;
var annotations = new WeatherForecastAnnotation [maxCount];
for (int i = 0; i < maxCount && (int) index < list.Count; i++, index += stride)
annotations[i] = list[(int) index];
return annotations;
}
