public static async Task <List <string> > MoveFiles(Dictionary <string, string> files)
{
var completedTaskList = new List <string>();
var error = false;
var pr = new ProgressWindow();
var source = new CancellationTokenSource();
pr.Closed += (o, args) => { source.CancelAfter(TimeSpan.FromMilliseconds(1)); };
void ProgressCallback(double prof) => pr.ProgressBar.Value = prof;
var totalSize = files.Where(file => !File.GetAttributes(file.Key).HasFlag(FileAttributes.Directory))
.Sum(file => new FileInfo(file.Key).Length);
pr.Show();
long totalRead = 0;
const double progressSize = 100.0;
if (totalSize <= 0)
{
pr.ProgressBar.Value = 100;
}
foreach (var item in files)
{
long totalReadForFile = 0;
var from = item.Key;
var to = item.Value;
if (File.GetAttributes(from).HasFlag(FileAttributes.Directory))
{
Directory.CreateDirectory(to);
continue;
}
using (var outStream = new FileStream(to, FileMode.Create, FileAccess.Write, FileShare.Read)) {
using (var inStream = new FileStream(from, FileMode.Open, FileAccess.ReadWrite, FileShare.Read)) {
try {
var read = totalRead;
await CopyStream(inStream, outStream, x => {
totalReadForFile = x;
ProgressCallback(
(read + totalReadForFile) /
(double)totalSize *progressSize);
}, source.Token).ContinueWith((task) => {
inStream.Dispose();
inStream.Close();
File.Delete(inStream.Name);
completedTaskList.Add($"{from} moved {to} {DateTime.Now}");
}, source.Token);
} catch (OperationCanceledException) {
outStream.Dispose();
outStream.Close();
if (File.Exists(to))
{
File.Delete(to);
}
error = true;
pr.Close();
break;
} catch (Exception e) {
MessageBox.Show(e.Message);
error = true;
}
}
}
totalRead += totalReadForFile;
}
if (!error)
{
foreach (var file in files)
{
if (Directory.Exists(file.Key) && File.GetAttributes(file.Key).HasFlag(FileAttributes.Directory))
{
Directory.Delete(file.Key, true);
}
break;
}
}
return(completedTaskList);
}