public GPSPosition GetPosition()
{
GPSPosition ret = null;
bool posAcquired = false;
lock (this) {
if (IsOpen())
{
int cb = Marshal.SizeOf(typeof(GPSPosition));
IntPtr ptr = LocalAlloc(LPTR, cb);
ret = new GPSPosition();
ret.dwVersion = 1;
ret.dwSize = Marshal.SizeOf(typeof(GPSPosition));
// Marshal our data to the native pointer we allocated.
Marshal.StructureToPtr(ret, ptr, false);
Int32 i = GPSGetPosition(hGPSDevice, ptr, mMaximunAge, 0);
if (i == 0)
{
Marshal.PtrToStructure(ptr, ret);
posAcquired = true;
// COMENTADO.
// Ahora la fecha la sacamos del SQL Server.
//' '' Seteo la hora actual en el sistema con la que tienen los satélites
// ''If ret.isValidField(GPSPosition.GPS_VALID_FIELDS.GPS_VALID_UTC_TIME) Then
// '' If ret.stUTCTime.wYear >= 2007 Then
// '' 'Si la diferencia de tiempo es de más de 2 minutos, actualiza la hora
// '' If Math.Abs(ret.Time.Subtract(DateTime.UtcNow).Minutes) > 2 Then
// '' Dim rc As UInteger
// '' rc = SetSystemTime(ret.stUTCTime)
// '' End If
// '' End If
// ''End If
}
else
{
MessageBox.Show("Error# " + i.ToString());
}
LocalFree(ptr);
}
}
if (posAcquired == false)
{
if (PositionReceived != null)
{
PositionReceived(ret);
}
}
return(ret);
}
public static bool IsPositionValid(GPSPosition position, bool ValidateFix, float MAXDOP)
{
bool posOk = false;
if ((position != null))
{
if (position.isValidField(GPSPosition.GPS_VALID_FIELDS.GPS_VALID_UTC_TIME) & position.isValidField(GPSPosition.GPS_VALID_FIELDS.GPS_VALID_HORIZONTAL_DILUTION_OF_PRECISION) & position.isValidField(GPSPosition.GPS_VALID_FIELDS.GPS_VALID_LATITUDE) & position.isValidField(GPSPosition.GPS_VALID_FIELDS.GPS_VALID_LONGITUDE) & (position.fixType >= GPSFixType.XyD | ValidateFix == false))
{
if ((MAXDOP >= position.flHorizontalDilutionOfPrecision) | MAXDOP == -1)
{
posOk = true;
}
}
}
return(posOk);
}