private string GetLogEntryText(LogEntry logEntry)
{
using (var mmf = MemoryMappedFile.CreateFromFile(filePath, FileMode.Open))
using (var viewStream = mmf.CreateViewStream(logEntry.Position, logEntry.Size, MemoryMappedFileAccess.Read))
using (var reader = new StreamReader(viewStream))
{
return reader.ReadToEnd();
}
}
private void ReadFileToEnd()
{
var fileSize = new FileInfo(filePath).Length;
var size = fileSize - currentFilePosition;
if (size <= 0) return;
var newEntries = new List<LogEntry>();
using (var mmf = MemoryMappedFile.CreateFromFile(filePath, FileMode.Open))
using (var viewStream = mmf.CreateViewStream(currentFilePosition, size, MemoryMappedFileAccess.Read))
using(var reader = new BinaryReader(viewStream))
{
var startPosition = currentFilePosition;
var lastChar = ' ';
while (reader.PeekChar() != -1)
{
var newChar = reader.ReadChar();
if (lastChar == '\r' && newChar == '\n')
{
newEntries.Add(new LogEntry(startPosition, currentFilePosition - startPosition, logEntryIndex++));
startPosition = currentFilePosition;
}
lastChar = newChar;
currentFilePosition++;
}
}
foreach (var newEntry in newEntries)
{
Entries.Add(newEntry);
}
SelectedLogEntry = Entries.LastOrDefault();
}
void FileDeleted(object sender, FileSystemEventArgs e)
{
dispatcher.Invoke(() =>
{
Entries.Clear();
SelectedLogEntry = null;
currentFilePosition = 0;
logEntryIndex = 0;
});
}