private void ReadTimerCallback(object state)
{
if(IsOpen())
{
try
{
GPSDataRequestParameter reqPara = new GPSDataRequestParameter();
reqPara.LastDataID = lastDataID;
reqPara.MaxLines = 10;
reqPara.LatestDataOnly = !bIsReplay;
reqPara.PathID = pathInfo.ID;
reqPara.PathPassword = pathInfo.Password;
GPSDownloadData[] receivedDatas = serviceClient.GetGPSData(reqPara);
if (receivedDatas != null)
{
foreach (GPSDownloadData dataItem in receivedDatas)
{
if (dataItem != null)
{
// Update the id
if (lastDataID < dataItem.ID)
lastDataID = dataItem.ID;
if (dataItem.NMEASentence.Length == 0)
continue;
byte[] data = new byte[System.Text.Encoding.Default.GetByteCount(dataItem.NMEASentence)];
data = System.Text.Encoding.Default.GetBytes(dataItem.NMEASentence);
// Dispatch the received data.
if (data != null)
{
if (Read != null)
Read(this, data);
}
}
}
}
}
catch (System.Exception )
{
// Don't exit if failed.
}
// ToDO - for the replay model, we should use the time tamp of the gps data.
try
{
// There is exception when close the port during receiving process.
if (!disposed)
readTimer.Change(1000, Timeout.Infinite); // Read data every second
}
catch (System.Exception)
{
}
}
}
public List <GPSDownloadData> GetGPSData(GPSDataRequestParameter para)
{
List <GPSDownloadData> gpsDataList = new List <GPSDownloadData>();
try
{
if (para.LatestDataOnly)
{
var datas = (from item in mGPSDB.PathDetails
where (item.ID > para.LastDataID) && (item.PathID == para.PathID)
orderby item.ID descending
select new GPSDownloadData()
{
ID = item.ID, NMEASentence = Decode(item.GPSSentence)
}).Take(para.MaxLines);
gpsDataList.AddRange(datas);
gpsDataList.Reverse(); // We must keep the sequence of the data the same as that we received.
}
else
{
var datas = (from item in mGPSDB.PathDetails
where (item.ID > para.LastDataID) && (item.PathID == para.PathID)
orderby item.ID ascending
select new GPSDownloadData()
{
ID = item.ID, NMEASentence = Decode(item.GPSSentence)
}).Take(para.MaxLines);
gpsDataList.AddRange(datas);
}
}
catch (System.Exception)
{
}
return(gpsDataList);
}
private void ReadTimerCallback(object state)
{
if (IsOpen())
{
try
{
GPSDataRequestParameter reqPara = new GPSDataRequestParameter();
reqPara.LastDataID = lastDataID;
reqPara.LastDataIDSpecified = true;
reqPara.MaxLines = 10;
reqPara.MaxLinesSpecified = true;
reqPara.LatestDataOnly = !bIsReplay;
reqPara.LatestDataOnlySpecified = true;
reqPara.PathID = pathInfo.ID;
reqPara.PathIDSpecified = true;
reqPara.PathPassword = pathInfo.Password;
GPSDownloadData[] receivedDatas = serviceClient.GetGPSData(reqPara);
if (receivedDatas != null)
{
foreach (GPSDownloadData dataItem in receivedDatas)
{
if (dataItem != null)
{
// Update the id
if (lastDataID < dataItem.ID)
{
lastDataID = dataItem.ID;
}
if (dataItem.NMEASentence.Length == 0)
{
continue;
}
byte[] data = new byte[System.Text.Encoding.Default.GetByteCount(dataItem.NMEASentence)];
data = System.Text.Encoding.Default.GetBytes(dataItem.NMEASentence);
// Dispatch the received data.
if (data != null)
{
if (Read != null)
{
Read(this, data);
}
}
}
}
}
}
catch (System.Exception)
{
// Don't exit if failed.
}
// ToDO - for the replay model, we should use the time tamp of the gps data.
try
{
// There is exception when close the port during receiving process.
if (!disposed)
{
readTimer.Change(1000, Timeout.Infinite); // Read data every second
}
}
catch (System.Exception)
{
}
}
}
public List<GPSDownloadData> GetGPSData(GPSDataRequestParameter para)
{
List<GPSDownloadData> gpsDataList = new List<GPSDownloadData>();
try
{
if(para.LatestDataOnly)
{
var datas = (from item in mGPSDB.PathDetails
where (item.ID > para.LastDataID) && (item.PathID == para.PathID)
orderby item.ID descending
select new GPSDownloadData() { ID = item.ID, NMEASentence = Decode(item.GPSSentence) }).Take(para.MaxLines);
gpsDataList.AddRange(datas);
gpsDataList.Reverse(); // We must keep the sequence of the data the same as that we received.
}
else
{
var datas = (from item in mGPSDB.PathDetails
where (item.ID > para.LastDataID) && (item.PathID == para.PathID)
orderby item.ID ascending
select new GPSDownloadData() { ID = item.ID, NMEASentence = Decode(item.GPSSentence) }).Take(para.MaxLines);
gpsDataList.AddRange(datas);
}
}
catch (System.Exception)
{
}
return gpsDataList;
}
/// <summary>
/// Return the last 10 sentences at most whose IDs are later than the lastID.
/// </summary>
/// <param name="path"></param>
/// <param name="lastID">if it is -1,qurey from the first sentence</param>
/// <returns></returns>
public List<GPSDownloadData> GetGPSData(GPSDataRequestParameter para)
{
// Verify the path info.
if (null == para)
return null;
if (-1 == para.PathID)
return null;
if (para.MaxLines < 1)
return null;
// ToDo we need check the id and password.
// Get the gps data.
return mDataAccesser.GetGPSData(para);
//return null;
}
