private WorkerDialog CreateDialog(string caption)
{
if (dlg != null)
throw new InvalidOperationException("Dialog is already running.");
this.dlg = new WorkerDialog();
dlg.Load += new EventHandler(dlg_Load);
dlg.Closed += new EventHandler(dlg_Closed);
dlg.Worker.WorkerSupportsCancellation = true;
dlg.Worker.WorkerReportsProgress = true;
dlg.Worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted);
dlg.Worker.ProgressChanged += new ProgressChangedEventHandler(Worker_ProgressChanged);
dlg.Worker.DoWork += new DoWorkEventHandler(Worker_DoWork);
dlg.DialogResult = DialogResult.Cancel;
dlg.Caption.Text = caption;
return dlg;
}
/// <summary>
/// The UI thread requests a background operation by calling this method.
/// </summary>
/// <param name="caption"></param>
/// <param name="backgroundTask"></param>
/// <returns></returns>
public bool StartBackgroundWork(string caption, Action backgroundTask)
{
lastException = null;
try
{
this.task = backgroundTask;
using (dlg = CreateDialog(caption))
{
if (uiSvc.ShowModalDialog(dlg) == DialogResult.OK)
return true;
if (lastException != null)
uiSvc.ShowError(lastException, "{0}", caption);
return false;
}
}
finally
{
dlg = null;
}
}