private void DumpStartingInfo(OperationParameters operationParameters)
{
var strBuilder = new StringBuilder();
strBuilder.AppendLine("Starting Operation:");
strBuilder.AppendLine($"\tNumber Of Files: {operationParameters.ImagesPathsList.Count}");
strBuilder.AppendLine($"\tOutput Path: {operationParameters.OutputPath}");
strBuilder.AppendLine($"\tMax Size: {operationParameters.MaxSize} {operationParameters.MaxSizeType.ToString()}");
LogMessage(strBuilder.ToString());
}
private async void btnStart_Click(object sender, EventArgs e)
{
txtLog.Clear();
if (_imagesPathsList == null)
{
LogMessage("No Files Selected");
return;
}
var maxSize = -1;
if (!int.TryParse(txtMaxSize.Text, out maxSize))
{
LogMessage("No Valid Size");
return;
}
if (string.IsNullOrWhiteSpace(txtOutput.Text))
{
LogMessage("No Output Path Chosen");
return;
}
// setting up operation parameters
_operationParameters = new OperationParameters
{
ImagesPathsList = _imagesPathsList,
OutputPath = txtOutput.Text,
MaxSize = maxSize,
MaxSizeType = comboSizeType.SelectedIndex == 0 ? SizeType.Megabytes :
comboSizeType.SelectedIndex == 1 ? SizeType.Kilobytes : SizeType.Bytes,
ImageType = comboImageType.SelectedIndex == 0 ? ImageType.Png : ImageType.Jpg,
};
DumpStartingInfo(_operationParameters);
if (!Directory.Exists(_operationParameters.OutputPath))
{
Directory.CreateDirectory(_operationParameters.OutputPath);
}
// canceling previous operation
_cancellationTokenSource?.Cancel();
_cancellationTokenSource = new CancellationTokenSource();
// preparing the progress bar
_context = SynchronizationContext.Current;
progressBar.Minimum = 0;
progressBar.Maximum = _imagesPathsList.Count;
progressBar.Value = 0;
// defining the action block to use
var proccessImageBlock = new ActionBlock <string>((path) =>
{
ProccessImage(path);
_context.Send((_) =>
{
progressBar.Value++;
}, null);
GC.Collect();
}, new ExecutionDataflowBlockOptions
{
MaxDegreeOfParallelism = Environment.ProcessorCount,
CancellationToken = _cancellationTokenSource.Token,
});
btnStart.Enabled = false;
btnCancel.Enabled = true;
Parallel.ForEach(_imagesPathsList, (path) => { proccessImageBlock.Post(path); });
// finish submitting and wait for completion
proccessImageBlock.Complete();
await proccessImageBlock.Completion.ContinueWith(task =>
{
_context.Send((_) =>
{
LogMessage("Done");
btnStart.Enabled = true;
btnCancel.Enabled = false;
}, null);
});
}