/// <summary>
/// Starts import process.
/// </summary>
/// <param name="parentPage">Page requirest importing.</param>
/// <param name="profile">Import profile.</param>
/// <param name="defaultDate">Default date for default initialize imported objects.</param>
/// <param name="dataProvider">Data provider.</param>
private void _StartImportProcess(AppPages.Page parentPage,
ImportProfile profile,
DateTime defaultDate,
IDataProvider dataProvider)
{
Debug.Assert(null != parentPage); // created
Debug.Assert(null != profile); // created
Debug.Assert(null != dataProvider); // creatde
// reset state
_importer = null;
_geocoder = null;
// subscribe to events
App currentApp = App.Current;
currentApp.MainWindow.Closed += new EventHandler(_MainWindow_Closed);
// create background worker
Debug.Assert(null == _worker); // only once
SuspendBackgroundWorker worker = _CreateBackgroundWorker();
// create internal objects
var tracker = new ImportCancelTracker(worker);
var cancelTracker = new CancellationTracker(tracker);
_informer = new ProgressInformer(parentPage, profile.Type, tracker);
_informer.SetStatus("ImportLabelImporting");
var infoTracker = new ProgressInfoTracker(worker,
_informer.ParentPage,
_informer.ObjectName,
_informer.ObjectsName);
_importer = new Importer(infoTracker);
if (PropertyHelpers.IsGeocodeSupported(profile.Type))
{
_geocoder = new Geocoder(infoTracker);
}
// set precondition
string message = currentApp.GetString("ImportProcessStarted", _informer.ObjectName);
currentApp.Messenger.AddInfo(message);
// lock GUI
currentApp.UIManager.Lock(true);
// run worker
var parameters = new ProcessParams(profile,
defaultDate,
dataProvider,
cancelTracker,
infoTracker);
worker.RunWorkerAsync(parameters);
_worker = worker;
}
/// <summary>
/// Creates background worker.
/// </summary>
/// <returns>Created background worker.</returns>
private SuspendBackgroundWorker _CreateBackgroundWorker()
{
var worker = new SuspendBackgroundWorker();
worker.WorkerReportsProgress = true;
worker.WorkerSupportsCancellation = true;
// subscribe to worker's events
worker.RunWorkerCompleted +=
new RunWorkerCompletedEventHandler(_worker_RunWorkerCompleted);
worker.ProgressChanged += new ProgressChangedEventHandler(_worker_ProgressChanged);
worker.DoWork += new DoWorkEventHandler(_worker_DoWork);
return(worker);
}
/// <summary>
/// Worker completed event handler.
/// Parses results.
/// </summary>
/// <param name="sender">Background worker.</param>
/// <param name="e">Run worker completed event arguments.</param>
private void _worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
var bw = sender as BackgroundWorker;
Debug.Assert(null != bw); // supported object
// stop events
bw.DoWork -= _worker_DoWork;
bw.ProgressChanged -= _worker_ProgressChanged;
bw.RunWorkerCompleted -= _worker_RunWorkerCompleted;
// free resources
bw.Dispose();
_worker = null;
// parse operation results
Storage storage = _ParseResults(e.Error, e.Cancelled);
// fire import completed
if (null != ImportCompleted)
{
Debug.Assert(null != storage); // inited
var events = new ImportCompletedEventArgs(storage.UpdatedObjects, e.Cancelled);
ImportCompleted(this, events);
}
}
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new instance of the <c>ImportCancelTracker</c> class.
/// </summary>
/// <param name="worker">Background worker.</param>
public ImportCancelTracker(SuspendBackgroundWorker worker)
{
Debug.Assert(null != worker); // created
_worker = worker;
}
/// <summary>
/// Starts import process.
/// </summary>
/// <param name="parentPage">Page requirest importing.</param>
/// <param name="profile">Import profile.</param>
/// <param name="defaultDate">Default date for default initialize imported objects.</param>
/// <param name="dataProvider">Data provider.</param>
private void _StartImportProcess(AppPages.Page parentPage,
ImportProfile profile,
DateTime defaultDate,
IDataProvider dataProvider)
{
Debug.Assert(null != parentPage); // created
Debug.Assert(null != profile); // created
Debug.Assert(null != dataProvider); // creatde
// reset state
_importer = null;
_geocoder = null;
// subscribe to events
App currentApp = App.Current;
currentApp.MainWindow.Closed += new EventHandler(_MainWindow_Closed);
// create background worker
Debug.Assert(null == _worker); // only once
SuspendBackgroundWorker worker = _CreateBackgroundWorker();
// create internal objects
var tracker = new ImportCancelTracker(worker);
var cancelTracker = new CancellationTracker(tracker);
_informer = new ProgressInformer(parentPage, profile.Type, tracker);
_informer.SetStatus("ImportLabelImporting");
var infoTracker = new ProgressInfoTracker(worker,
_informer.ParentPage,
_informer.ObjectName,
_informer.ObjectsName);
_importer = new Importer(infoTracker);
if (PropertyHelpers.IsGeocodeSupported(profile.Type))
{
_geocoder = new Geocoder(infoTracker);
}
// set precondition
string message = currentApp.GetString("ImportProcessStarted", _informer.ObjectName);
currentApp.Messenger.AddInfo(message);
// lock GUI
currentApp.UIManager.Lock(true);
// run worker
var parameters = new ProcessParams(profile,
defaultDate,
dataProvider,
cancelTracker,
infoTracker);
worker.RunWorkerAsync(parameters);
_worker = worker;
}
/// <summary>
/// Creates background worker.
/// </summary>
/// <returns>Created background worker.</returns>
private SuspendBackgroundWorker _CreateBackgroundWorker()
{
var worker = new SuspendBackgroundWorker();
worker.WorkerReportsProgress = true;
worker.WorkerSupportsCancellation = true;
// subscribe to worker's events
worker.RunWorkerCompleted +=
new RunWorkerCompletedEventHandler(_worker_RunWorkerCompleted);
worker.ProgressChanged += new ProgressChangedEventHandler(_worker_ProgressChanged);
worker.DoWork += new DoWorkEventHandler(_worker_DoWork);
return worker;
}
/// <summary>
/// Stops asynchronous import.
/// </summary>
private void _Abort()
{
if (_worker != null)
{
if (_worker.IsBusy)
_worker.CancelAsync();
_worker = null;
}
}
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Deletes created cursors.
/// </summary>
public void Dispose()
{
// unsubscribe to events
if (null != App.Current.MainWindow)
App.Current.MainWindow.Closed -= _MainWindow_Closed;
if (null != _informer)
_informer.Dispose();
_informer = null;
_importer = null;
_geocoder = null;
_worker = null;
}
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Creates a new instance of the <c>ImportCancelTracker</c> class.
/// </summary>
/// <param name="worker">Background worker.</param>
public ImportCancelTracker(SuspendBackgroundWorker worker)
{
Debug.Assert(null != worker); // created
_worker = worker;
}