public LasExportMainVM(IList <IPointsRow> rows, IEnumerable <ICurveInfo> curveInfos)
{
_rows = rows ?? throw new ArgumentNullException(nameof(rows));
CurveInfos = curveInfos?.Select(ci => new CurveInfo(ci.Title, ci.IsShown)).ToArray() ?? throw new ArgumentNullException(nameof(curveInfos));
SelectAll = new ActionCommand(selectAll, () => !_cancellationManager.HasTasks, _cancellationManager);
UnselectAll = new ActionCommand(unselectAll, () => !_cancellationManager.HasTasks, _cancellationManager);
Export = new ActionCommand(exportAsync, () => !_cancellationManager.HasTasks, _cancellationManager);
Cancel = new ActionCommand(TryCancelExportAsync, () => _cancellationManager.HasTasks, _cancellationManager);
void selectAll()
{
foreach (var ci in CurveInfos)
{
ci.IsShown = true;
}
}
void unselectAll()
{
foreach (var ci in CurveInfos)
{
ci.IsShown = false;
}
}
async Task exportAsync()
{
var file = tryRequestFile();
if (file.Stream != null)
{
using (file.Stream)
{
try
{
ExportProgress.Reset();
var exportingCurvesIndexes = CurveInfos.FindAllIndexes(ci => ci.IsShown).ToArray();
var curvesNames = CurveInfos.Get(exportingCurvesIndexes).Select(ci => ci.Title).ToArray();
var filteredRows = _rows.GetRange(0, _rows.Count)
.Select(r => r.Points.Get(exportingCurvesIndexes).ToArray());
var task = new LasExporter()
.SaveToAsync(file.Stream, curvesNames, filteredRows, _rows.Count, new AsyncOperationInfo(ExportProgress, _cancellationManager.Token));
await _cancellationManager.RegisterAndReturn(task);
UserInteracting.ReportSuccess("Экспорт в Las", "Экспорт успешно завершен");
}
catch (OperationCanceledException)
{
file.Stream.Dispose();
CommonUtils.Try(() => File.Delete(file.Path));
ExportProgress.Stage = "Операция прервана";
ExportProgress.OperationStatus = OperationStatus.ABORTED;
}
catch (Exception ex)
{
Logger.LogErrorEverywhere("Ошибка экспорта в Las", ex);
Reporter.ReportError("Не удалось произвести экспорт в Las", ex);
ExportProgress.Stage = "Ошибка экспорта";
ExportProgress.OperationStatus = OperationStatus.FAILED;
UserInteracting.ReportError("Экспорт в Las", "Неизвестная ошибка экспорта");
await TryCancelExportAsync();
}
finally
{
_cancellationManager.Reset();
}
}
}
(Stream Stream, string Path) tryRequestFile()
{
var filePath = IOUtils.RequestFileSavingPath("LAS (*las)|*las");
return(CommonUtils.TryOrDefault(() =>
{
if (!Path.HasExtension(filePath))
{
filePath += ".las";
}
File.Delete(filePath);
return File.OpenWrite(filePath);
}), filePath);
}
}
}