/**
* Copies the most recent data aquisition
* */
public MHMDataSet stopAddingData()
{
if (index > 1)
{
MHMDataSet d = new MHMDataSet(index - 1, startTime);
for (int i = 0; i < index - 1; i++)
{
d.addDataPoint(Bx[i], By[i], Bz[i], Bnorm[i], timestamp[i], T[i]);
}
return(d);
}
else
{
return(null);
}
}
public MHMDataSet updateReading()
{
//get the newest file
string[] files = Directory.GetFiles(filePath, "*.csv");
DateTime[] fileWrites = new DateTime[files.Length];
for (int i = 0; i < fileWrites.Length; i++)
{
fileWrites[i] = File.GetLastWriteTime(files[i]);
}
Array.Sort(fileWrites, files);
//check if the file is new or whether we are already loading from it
if (!currentFilename.Equals(files[files.Length - 1]))
{
//restart the data aquisition, remember the youngest file is the last one
currentFilename = files[files.Length - 1];
prevLineCount = 0;
data = new MHMDataSet();
}
//check if the no. of lines has increased since the last time
int lineCount = 0;
using (FileStream stream = File.Open(currentFilename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (StreamReader reader = new StreamReader(stream))
{
string line = null;
while ((line = reader.ReadLine()) != null)
{
lineCount++;
}
}
}
if (lineCount > prevLineCount)
{
data.startAddingData();
int curLine = 0;
try
{
using (FileStream stream = File.Open(currentFilename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (StreamReader reader = new StreamReader(stream))
{
string line;
while ((line = reader.ReadLine()) != null)
{
//check of the header has been found (the file is not new if the header is already here)
if (prevLineCount == 0)
{
//find the header
if (String.Equals("DATA", line))
{
line = reader.ReadLine();
curLine++;
string[] pieces = line.Split(';');
header = pieces;
prevLineCount = curLine;
}
}
else
{
//add new data lines to the buffer
if (curLine > prevLineCount)
{
string[] pieces = line.Split(';');
data.addDataPoint(Convert.ToDouble(pieces[4]), Convert.ToDouble(pieces[5]), Convert.ToDouble(pieces[6]), Convert.ToInt32(pieces[0]), Convert.ToInt32(pieces[1]), Convert.ToInt32(pieces[2]), Convert.ToInt32(pieces[3]), Convert.ToDouble(pieces[7]));
}
}
curLine++;
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine(curLine - prevLineCount);
prevLineCount = curLine;
return(data.stopAddingData());
}
else
{
return(null);
}
}
