public static async Task WaitWithProgress(
this Task task, string caption, CancellationTokenSource cts = null)
{
var dialogCts = new CancellationTokenSource();
var dialog = new TaskDialog {
Caption = caption,
Content = string.Empty
};
if (cts != null)
{
dialog.IsCancelable = true;
dialog.CommonButtons = TaskDialogButtons.Cancel;
}
dialog.Controls.Add(new TaskDialogProgressBar {
IsIndeterminate = true
});
dialog.Closing += (s, e) => {
if (e.Button == TaskDialogButtonId.Cancel)
{
dialogCts.Cancel();
cts?.Cancel();
}
};
await Task.WhenAny(task, dialog.ShowModalDelayed(dialogCts.Token));
dialogCts.Cancel();
if (dialog.IsShown)
{
dialog.Abort();
}
}