private void ChooseFolderButton_Click(object sender, RoutedEventArgs e)
{
// Create a FolderBrowserDialog object to enable the user to
// select a folder.
FolderBrowserDialog dlg = new FolderBrowserDialog
{
ShowNewFolderButton = false
};
// Set the selected path to the common Sample Pictures folder
// if it exists.
string initialDirectory = System.IO.Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.CommonPictures),
"Sample Pictures");
if (Directory.Exists(initialDirectory))
{
dlg.SelectedPath = initialDirectory;
}
// Show the dialog and process the dataflow network.
if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
// Create a new CancellationTokenSource object to enable
// cancellation.
CancellationTokenSource = new CancellationTokenSource();
// Create the image processing network if needed.
if (HeadBlock == null)
{
HeadBlock = ImageProcessingNetwork.CreateImageProcessingNetwork(CancellationTokenSource);
}
// Post the selected path to the network.
HeadBlock.Post(dlg.SelectedPath);
// Enable the Cancel button and disable the Choose Folder button.
ChooseFolderButton.IsEnabled = false;
CancelButton.IsEnabled = true;
// Show a wait cursor.
Cursor = Cursors.Wait;
}
}
