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| public partial class FormExploreDirectory : Form
{
public FormExploreDirectory()
{
InitializeComponent();
btnCancel.Enabled = false;
txtTemporization.Text = 10.ToString();
}
private BackgroundWorker _bw;
private void btnSelect_Click(object sender, EventArgs e)
{
using (var dialog = new FolderBrowserDialog
{
SelectedPath = !string.IsNullOrEmpty(txtPath.Text) ? txtPath.Text : @"C:\"
})
{
var result = dialog.ShowDialog();
if (result == DialogResult.OK)
{
txtPath.Text = dialog.SelectedPath;
}
}
}
private void btnStart_Click(object sender, EventArgs e)
{
txtTemporization.Enabled = false;
txtPath.Enabled = false;
btnSelect.Enabled = true;
btnStart.Enabled = false;
_bw = new BackgroundWorker
{
WorkerReportsProgress = true,
WorkerSupportsCancellation = true
};
_bw.DoWork += Bw_DoWork;
_bw.ProgressChanged += Bw_ProgressChanged;
_bw.RunWorkerCompleted += Bw_RunWorkerCompleted;
txtResult.Text = string.Empty;
btnCancel.Enabled = true;
var temporization = int.Parse(txtTemporization.Text);
_bw.RunWorkerAsync((txtPath.Text, temporization));
}
private void Bw_DoWork(object sender, DoWorkEventArgs e)
{
var worker = (BackgroundWorker)sender;
var (path, temporization) = ((string, int))e.Argument;
using (var writer = new StreamWriter(File.OpenWrite("tmp.txt")))
{
ExploreDirectory(path, temporization, worker, e, writer);
}
}
private void ExploreDirectory(string path, int temporization, BackgroundWorker worker, DoWorkEventArgs e, TextWriter writer)
{
Thread.Sleep(temporization); // Temporisation pour ne pas surcharger l'ui de messages
var files = Directory.GetFiles(path);
var items = files.Prepend(path).ToArray();
writer.WriteLine(string.Join(Environment.NewLine, items));
worker.ReportProgress(0, items);
var directories = Directory.GetDirectories(path);
foreach (var directory in directories)
{
if (worker.CancellationPending)
{
e.Cancel = true;
return;
}
ExploreDirectory(directory, temporization, worker, e, writer);
}
}
private void Bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
var items = (string[])e.UserState;
txtResult.Text = string.Join(Environment.NewLine, items);
}
private void Bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
try { txtResult.Text = File.ReadAllText("tmp.txt"); }
catch { }
if (e.Cancelled)
MessageBox.Show("Vous avez annulé la recherche", "Action annullée", MessageBoxButtons.OK, MessageBoxIcon.Warning);
else if (e.Error != null)
MessageBox.Show(e.Error.Message, "Une erreur s'est produite", MessageBoxButtons.OK, MessageBoxIcon.Error);
else
MessageBox.Show("La recherche est terminée", "Terminé", MessageBoxButtons.OK, MessageBoxIcon.Information);
txtTemporization.Enabled = true;
txtPath.Enabled = true;
btnSelect.Enabled = true;
btnStart.Enabled = true;
btnCancel.Enabled = false;
}
private void btnCancel_Click(object sender, EventArgs e)
{
_bw.CancelAsync();
btnCancel.Enabled = false;
btnStart.Enabled = true;
_bw = null;
}
private void txtTemporization_TextChanged(object sender, EventArgs e)
{
if (!int.TryParse(txtTemporization.Text, out int _))
txtTemporization.Text = 10.ToString();
}
} |
Thread et BackgroundWorker
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Envoyé par Nico1131
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