public static IDisposable CreateWriter(Stream stream, out IGpxWriter writer)
{
var result = new GpxWriter(stream);
writer = result;
return(result);
}
public int SaveFile(GeoPosition<GeoCoordinate> Position = null)
{
if (Position == null)
{
GeoCoordinateWatcher watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);
watcher.Start();
Position = watcher.Position;
}
var fileName = CurrentFileName();
var tempFileName = "record.gpx.temp";
var count = 0;
bool firstRun = true;
IsolatedStorageFile isStore = IsolatedStorageFile.GetUserStoreForApplication();
if (isStore.FileExists(tempFileName))
{
isStore.DeleteFile(tempFileName);
}
if (isStore.FileExists(fileName))
{
firstRun = false;
isStore.MoveFile(fileName, tempFileName);
}
using (IsolatedStorageFileStream input = new IsolatedStorageFileStream(tempFileName, System.IO.FileMode.OpenOrCreate, FileAccess.Read, isStore))
using (IsolatedStorageFileStream output = new IsolatedStorageFileStream(fileName, System.IO.FileMode.OpenOrCreate, FileAccess.Write, isStore))
using (GpxWriter writer = new GpxWriter(output))
{
GpxWayPoint last = null;
if (!firstRun)
{
using (GpxReader reader = new GpxReader(input))
{
while (reader.Read())
{
switch (reader.ObjectType)
{
case GpxObjectType.WayPoint:
count++;
writer.WriteWayPoint(reader.WayPoint);
last = reader.WayPoint;
break;
}
}
}
}
IsolatedStorageSettings.ApplicationSettings["LastLocation"] = last;
IsolatedStorageSettings.ApplicationSettings.Save();
if (double.IsNaN(Position.Location.Latitude) || double.IsNaN(Position.Location.Longitude))
{
return count;
}
if (last == null || last.Time.ToString() != Position.Timestamp.UtcDateTime.ToString())
{
writer.WriteWayPoint(new GpxWayPoint
{
Latitude = Position.Location.Latitude,
Longitude = Position.Location.Longitude,
Elevation = Position.Location.Altitude,
Time = Position.Timestamp.UtcDateTime,
});
count++;
}
}
return count;
}