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();
}
}
public static async Task <T> RunWithProgress <T>(
string caption, string info,
Func <CancellationToken, IProgress <ProgressDelta>, T> action,
CancellationToken?cancellationToken = null,
TimeSpan?progressUpdateInterval = null)
{
var dialogCts = new CancellationTokenSource();
var linkedCts = cancellationToken != null
? CancellationTokenSource.CreateLinkedTokenSource(dialogCts.Token, cancellationToken.Value)
: dialogCts;
var dialog = new TaskDialog {
Caption = caption,
Content = string.Empty
};
if (cancellationToken != null)
{
dialog.IsCancelable = true;
dialog.CommonButtons = TaskDialogButtons.Cancel;
}
dialog.Controls.Add(new TaskDialogProgressBar(0, 100, 0));
dialog.Closing += (s, e) => {
if (e.Button == TaskDialogButtonId.Cancel)
{
linkedCts.Cancel();
}
};
var progress = new PeriodicCumulativeProgress(
progressUpdateInterval ?? TimeSpan.FromMilliseconds(100),
x => {
if (x.IsIndeterminate)
{
dialog.ProgressBar.IsIndeterminate = true;
dialog.Content = $"{x.Delta} {info}";
}
else
{
dialog.ProgressBar.IsIndeterminate = false;
dialog.ProgressBar.Value = x.Completion(x.Delta);
dialog.Content = $"{x.Delta}/{x.Total} {info}";
}
});
using (dialogCts)
using (cancellationToken != null ? linkedCts : null)
using (progress) {
var dialogTask = ShowModalDelayed(dialog, dialogCts.Token);
var result = await Task.Run(
() => action(linkedCts.Token, progress), linkedCts.Token);
dialogCts.Cancel();
if (dialog.IsShown)
{
dialog.Abort();
}
await dialogTask.IgnoreCancellation();
return(result);
}
}
