// </SnippetOnCancel>
// <SnippetFindSourcesClick>
private async void findSourcesButton_Click(object sender, RoutedEventArgs e)
{
var sources = await PhotoImportManager.FindAllSourcesAsync();
foreach (PhotoImportSource source in sources)
{
ComboBoxItem item = new ComboBoxItem();
item.Content = source.DisplayName;
item.Tag = source;
sourcesComboBox.Items.Add(item);
}
}
/// <summary>
/// Enumerate all PTP / MTP sources when FindAllSources button is clicked.
/// </summary>
/// <param name="sender">The source of the click event</param>
/// <param name="e">Details about the click event </param>
private async void OnFindSourcesClicked(object sender, RoutedEventArgs e)
{
try
{
rootPage.NotifyUser(String.Empty, NotifyType.StatusMessage);
// clear our list of items to import
this.itemsToImport = null;
this.fileListView.ItemsSource = this.itemsToImport;
// reset UI elements
this.progressBar.Value = 0.0;
this.propertiesTxtBox.Text = "";
// disable all buttons until source selection is made
setButtonState(false);
// reenable source selection
this.sourceListBox.IsEnabled = true;
// clear find criteria
this.OnlyImages.IsChecked = false;
this.OnlyVideo.IsChecked = false;
this.ImagesAndVideo.IsChecked = false;
// Dispose any created import session
if (this.session != null)
{
this.session.Dispose();
this.session = null;
}
// Check to ensure API is supported
bool importSupported = await PhotoImportManager.IsSupportedAsync();
if (importSupported)
{
// enumerate all available sources to where we can import from
sourceListBox.ItemsSource = await PhotoImportManager.FindAllSourcesAsync();
}
else
{
rootPage.NotifyUser("Import is not supported.", NotifyType.ErrorMessage);
}
}
catch (Exception ex)
{
rootPage.NotifyUser("FindAllSourcesAsync Failed. " + "Exception: " + ex.ToString(), NotifyType.ErrorMessage);
}
}
/// <summary
/// This app is registered as a hanlder for WPD\IMageSourceAutoPlay event.
/// When a user connects a WPD device (ie: Camera), OnNavigatedTo is called with DeviceInformationId
/// that we can call FromIdAsync() and preselect the device.
///
/// We also need to handle the situation where the client was terminated while an import operation was in flight.
/// Import will continue and we attempt to reconnect back to the session.
/// </summary>
/// <param name="e">Details about the NavigationEventArgs</param>
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
rootPage = MainPage.Current;
try
{
//An photo import session was in progress
if (e.Parameter is PhotoImportOperation)
{
PhotoImportOperation op = e.Parameter as PhotoImportOperation;
switch (op.Stage)
{
// file enumeration was running
case PhotoImportStage.FindingItems:
cts = new CancellationTokenSource();
rootPage.NotifyUser("Reconnected back to the file enumeration stage", NotifyType.StatusMessage);
// Set up progress handler for existing file enumeration
var findAllItemsProgress = new Progress <uint>((result) =>
{
rootPage.NotifyUser(String.Format("Found {0} Files", result.ToString()), NotifyType.StatusMessage);
});
// retrieve previous session
this.session = op.Session;
// get to the operation for the existing FindItemsAsync session
this.itemsResult = await op.ContinueFindingItemsAsync.AsTask(cts.Token, findAllItemsProgress);
// display the items we found in the previous session
setIncrementalFileList(this.itemsResult);
this.selectAllButton.IsEnabled = true;
this.selectNoneButton.IsEnabled = true;
this.selectNewButton.IsEnabled = true;
this.importButton.IsEnabled = true;
DisplayFindItemsResult();
cts = null;
break;
// Import was running
case PhotoImportStage.ImportingItems:
rootPage.NotifyUser("Reconnected back to the importing stage.", NotifyType.StatusMessage);
setButtonState(false);
cts = new CancellationTokenSource();
// Set up progress handler for the existing import session
var importSelectedItemsProgress = new Progress <PhotoImportProgress>((result) =>
{
progressBar.Value = result.ImportProgress;
});
// retrieve the previous operation
this.session = op.Session;
// get the itemsResult that were found in the previous session
this.itemsResult = await op.ContinueFindingItemsAsync.AsTask();
// hook up the ItemImported Handler to show progress
this.itemsResult.ItemImported += async(s, a) =>
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
rootPage.NotifyUser(String.Format("Imported: {0}", a.ImportedItem.Name), NotifyType.StatusMessage);
});
};
// Get the operation for the import operation that was in flight
this.importedResult = await op.ContinueImportingItemsAsync.AsTask(cts.Token, importSelectedItemsProgress);
DisplayImportedSummary();
this.findSourceButton.IsEnabled = true;
this.deleteButton.IsEnabled = true;
cts = null;
break;
// Delete operation is in progress
case PhotoImportStage.DeletingImportedItemsFromSource:
rootPage.NotifyUser("Reconnected to the deletion stage.", NotifyType.StatusMessage);
this.findSourceButton.IsEnabled = false;
this.deleteButton.IsEnabled = false;
cts = new CancellationTokenSource();
var progress = new Progress <double>((result) =>
{
this.progressBar.Value = result;
});
// get the operation for the existing delete session
this.deleteResult = await op.ContinueDeletingImportedItemsFromSourceAsync.AsTask(cts.Token, progress);
DisplayDeletedResults();
if (!deleteResult.HasSucceeded)
{
rootPage.NotifyUser("Deletion did not succeeded or was cancelled.", NotifyType.StatusMessage);
}
this.findSourceButton.IsEnabled = true;
// Set the CancellationTokenSource to null when the work is complete.
cts = null;
break;
// Idle State.
case PhotoImportStage.NotStarted:
rootPage.NotifyUser("No import tasks was started.", NotifyType.StatusMessage);
this.session = op.Session;
break;
default:
break;
}
}
// Activated by AutoPlay
if (e.Parameter is DeviceActivatedEventArgs)
{
this.arguments = e.Parameter as DeviceActivatedEventArgs;
bool importSupported = await PhotoImportManager.IsSupportedAsync();
this.sourceListBox.Items.Clear();
List <PhotoImportSource> source = new List <PhotoImportSource>();
// Create the source from a device Id
source.Add(await PhotoImportSource.FromIdAsync(this.arguments.DeviceInformationId));
// bind and preselects source
this.sourceListBox.ItemsSource = source;
this.sourceListBox.SelectedIndex = 0;
rootPage.NotifyUser("Device selected from AutoPlay", NotifyType.StatusMessage);
}
}
catch (Exception ex)
{
rootPage.NotifyUser("Exception: " + ex.ToString(), NotifyType.ErrorMessage);
}
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used such as when the application is launched to open a specific file.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
protected override async void OnLaunched(LaunchActivatedEventArgs e)
{
#if DEBUG
if (System.Diagnostics.Debugger.IsAttached)
{
this.DebugSettings.EnableFrameRateCounter = false;
}
#endif
Frame rootFrame = Window.Current.Content as Frame;
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
// Set the default language
rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];
rootFrame.NavigationFailed += OnNavigationFailed;
rootFrame.Navigate(typeof(MainPage));
// if our app was previous terminated or wasn't running, check if there were pending progress
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated || e.PreviousExecutionState == ApplicationExecutionState.NotRunning)
{
try
{
bool isImportSupported = await PhotoImportManager.IsSupportedAsync();
if (isImportSupported)
{
// Determine if there was an in progress session
IReadOnlyList <PhotoImportOperation> ops = PhotoImportManager.GetPendingOperations();
// If there is at least one session and state isn't idle, restore session state
if (ops != null && ops.Count != 0)
{
var p = rootFrame.Content as MainPage;
if (ops.Count > 1)
{
// If there is more than one operation, since this app handles single
// download sessions only, the previous session(s) were not properly
// disposed of, do this now.
for (int x = 0; x < ops.Count - 1; x++)
{
ops[x].Session.Dispose();
}
}
// Take the last operation from the list, and if some task was started, navigate to reconnect to the proper stage.
p.ImportOperation = ops[ops.Count - 1];
if (p.ImportOperation.Stage != PhotoImportStage.NotStarted)
{
p.NavigateToReconnect();
}
else
{
p.ImportOperation.Session.Dispose();
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine("Exception: " + ex.Message);
}
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
}
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
// Ensure the current window is active
Window.Current.Activate();
}
