private void OnFrameNavigated(object sender, NavigationEventArgs e)
{
if (e.Content == _frameContentWhenOpened)
{
// Navigation to original page; close the scanner page
closeScanner();
}
else if (null == _scannerPage)
{
_scannerPage = e.Content as barcodescanner.Scanner;
if (null != _scannerPage)
{
_scannerPage.Completed += new EventHandler <barcodescanner.ScannerResult>(scanner_Completed);
}
}
}
void root_Navigated(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
if (!(e.Content is barcodescanner.Scanner))
{
return;
}
(Application.Current.RootVisual as PhoneApplicationFrame).Navigated -= root_Navigated;
barcodescanner.Scanner scanner = (barcodescanner.Scanner)e.Content;
if (scanner != null)
{
scanner.Completed += new EventHandler <barcodescanner.ScannerResult>(scanner_Completed);
}
}
/// <summary>
/// Deattach events
/// </summary>
private void closeScanner()
{
// Unhook from events
if (null != _frame)
{
_frame.Navigated -= OnFrameNavigated;
_frame.NavigationStopped -= OnFrameNavigationStoppedOrFailed;
_frame.NavigationFailed -= OnFrameNavigationStoppedOrFailed;
_frame = null;
_frameContentWhenOpened = null;
}
if (null != _scannerPage){
_scannerPage = null;
}
}
/// <summary>
/// Deattach events
/// </summary>
private void closeScanner()
{
// Unhook from events
if (null != _frame)
{
_frame.Navigated -= OnFrameNavigated;
_frame.NavigationStopped -= OnFrameNavigationStoppedOrFailed;
_frame.NavigationFailed -= OnFrameNavigationStoppedOrFailed;
_frame = null;
_frameContentWhenOpened = null;
}
if (null != _scannerPage)
{
_scannerPage = null;
}
}
private void OnFrameNavigated(object sender, NavigationEventArgs e)
{
if (e.Content == _frameContentWhenOpened)
{
// Navigation to original page; close the scanner page
closeScanner();
}
else if (null == _scannerPage)
{
_scannerPage = e.Content as barcodescanner.Scanner;
if (null != _scannerPage)
{
_scannerPage.Completed += new EventHandler<barcodescanner.ScannerResult>(scanner_Completed);
}
}
}
