public Task LoadAsync(CancellationToken token = new CancellationToken())
{
if (IsLoading)
{
return(_loadingTask);
}
timer.Start();
token.Register(() =>
{
ResetState();
_synchronizationContext.Send(SetCount, 0);
}
);
IsLoading = true;
if (_collection != null)
{
_collection.Clear();
}
_synchronizationContext.Send(SetCount, 0);
return(_loadingTask = Task.Run(() =>
{
try
{
_collection = _provider.GetItems(_progress, token);
}
catch (Exception ex)
{
OnLoadingError(ex);
_synchronizationContext.Send(SetCount, 0);
return;
}
_synchronizationContext.Send(LoadCompleted, _collection.Count);
}, token));
}
private List <LogLine> GetLines()
{
var result = new List <LogLine>();
string[] lines;
try
{
using (var fileStream = new FileStream(FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (var streamReader = new StreamReader(fileStream, Encoding.GetEncoding(1251)))
{
var log = streamReader.ReadToEnd();
lines = log.Split(new[] { Environment.NewLine, "\n" }, StringSplitOptions.None);
}
}
}
catch (SystemException ex)
{
Logger.Error(ex.Message);
return(result);
}
LogLine previousLine = null;
int lastIndex = lines.Length - 1;
var columnsCount = Mapping.Columns.Count;
for (int i = 0; i <= lastIndex; i++)
{
var line = lines[i];
if (i == lastIndex && string.IsNullOrEmpty(line))
{
break;
}
var items = _itemsProvider.GetItems(line);
if (items.Count == columnsCount)
{
previousLine = new LogLine(i, Mapping, items, previousLine);
result.Add(previousLine);
}
else
{
if (previousLine != null)
{
if (!Mapping.IgnoreEmptyLines || !string.IsNullOrEmpty(line))
{
previousLine.AppendMessage(line);
}
}
else
{
previousLine = new LogLine(i, line);
result.Add(previousLine);
}
}
}
return(result);
}
/// <summary>
/// Gets the page from the item provider.
/// </summary>
/// <param name="pageIndex"></param>
/// <returns></returns>
protected IList <T> FetchPage(int pageIndex)
{
IList <T> page = new List <T>();
foreach (T item in _itemsProvider.GetItems(pageIndex * PageSize, PageSize))
{
page.Add(item);
}
return(page);
}
