public static DialogResult Start(IWin32Window parent, Task task, bool cancellable, string sessionKey)
{
if (task == null || task.IsCompleted)
{
return(DialogResult.OK);
}
using (var dialog = new ProgressStateDialog())
using (var cancel = new System.Threading.CancellationTokenSource())
{
dialog.btnCancel.Visible = cancellable;
dialog.btnCancel.Enabled = cancellable;
dialog.btnCancel.Click += (sender, e) =>
{
if (MessageBox.Show("処理をキャンセルしますか？",
"確認",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) == DialogResult.No)
{
return;
}
cancel.Cancel();
dialog.btnCancel.Enabled = false;
dialog.DialogResult = DialogResult.Cancel;
};
dialog.Shown += (sender, e) =>
{
task.ContinueWith(t =>
{
bool cancelled = cancel.IsCancellationRequested;
dialog.DialogResult = cancelled ? DialogResult.Cancel : DialogResult.OK;
});
};
dialog.ShowDialog(parent);
try
{
task.Wait(cancel.Token);
}
catch (AggregateException ex)
{
//Debug.Fail(ex.StackTrace);
foreach (Exception inner in ex.InnerExceptions)
{
//Debug.Fail(ex.ToString());
NLogHandler.WriteErrorLog(new ProgressStateDialog(), inner, sessionKey);
}
return(DialogResult.Abort);
}
catch (OperationCanceledException)
{
}
return(dialog.DialogResult);
}
}
public static DialogResult Start(IWin32Window parent,
Func <System.Threading.CancellationToken, IProgress <int>, Task> transaction,
bool cancellable, string sessionKey)
{
using (var dialog = new ProgressStateDialog())
using (var cancel = new System.Threading.CancellationTokenSource())
{
dialog.btnCancel.Click += (sender, e) =>
{
if (MessageBox.Show("処理をキャンセルしますか？",
"確認",
MessageBoxButtons.YesNo,
MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) == DialogResult.No)
{
return;
}
cancel.Cancel();
dialog.btnCancel.Enabled = false;
dialog.DialogResult = DialogResult.Cancel;
};
// プログレスバーの更新は、非同期処理に任せる
IProgress <int> progress = new Progress <int>(percent => dialog.prgBar.Value = percent);
progress.Report(0);
Task task = transaction(cancel.Token, progress);
if (task == null || task.IsCompleted)
{
return(DialogResult.OK);
}
dialog.Shown += (sender, e) =>
{
dialog.btnCancel.Enabled = cancellable;
task.ContinueWith(t =>
{
bool cancelled = cancel.IsCancellationRequested;
dialog.DialogResult = cancelled ? DialogResult.Cancel : DialogResult.OK;
});
};
dialog.ShowDialog(parent);
try
{
task.Wait(cancel.Token);
}
catch (AggregateException ex)
{
NLogHandler.WriteErrorLog(new ProgressStateDialog(), ex, sessionKey);
return(DialogResult.Abort);
}
catch (OperationCanceledException)
{
}
return(dialog.DialogResult);
}
}
