private void GetListViewItems(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = (BackgroundWorker)sender;
Stopwatch watch = new Stopwatch();
ShellItem parent = e.Argument as ShellItem;
watch.Reset();
watch.Start();
List <ShellItem> subFolders = parent.GetFolders(false);
List <ShellItem> subFiles = parent.GetFiles();
watch.Stop();
int foldersCount = subFolders.Count;
int filesCount = subFiles.Count;
ListViewItem[] files = new ListViewItem[filesCount];
ListViewItem[] folders = new ListViewItem[foldersCount];
if (foldersCount + filesCount > 0)
{
mre.WaitOne();
Thread t1 = null;
Thread t2 = null;
Thread t3 = null;
Thread t4 = null;
bool slow = watch.ElapsedMilliseconds > 800;
if (slow)
{
int quarter = filesCount >> 2;
int half = filesCount >> 1;
t1 = new Thread(delegate() { LoadListViewItems(files, subFiles, 0, quarter); });
t2 = new Thread(delegate() { LoadListViewItems(files, subFiles, quarter, half); });
t3 = new Thread(delegate() { LoadListViewItems(files, subFiles, half, half + quarter); });
t4 = new Thread(delegate() { LoadListViewItems(files, subFiles, half + quarter, filesCount); });
t1.SetApartmentState(ApartmentState.MTA);
t2.SetApartmentState(ApartmentState.MTA);
t3.SetApartmentState(ApartmentState.MTA);
t4.SetApartmentState(ApartmentState.MTA);
t1.Start();
t2.Start();
t3.Start();
t4.Start();
LoadListViewItems(folders, subFolders, 0, foldersCount);
}
else
{
t1 = new Thread(delegate() { LoadListViewItems(files, subFiles, 0, filesCount); });
t1.Start();
LoadListViewItems(folders, subFolders, 0, foldersCount);
}
Array.Sort(folders, sorter);
Items.AddRange(folders);
if (slow)
{
t1.Join();
t2.Join();
t3.Join();
t4.Join();
}
else
{
t1.Join();
}
}
worker.ReportProgress(100, files);
}