private void OnSelect1Click(object sender, EventArgs e)
{
if (_metadataLiveSource != null)
{
// Close any current displayed Metadata Live Source
_metadataLiveSource.LiveContentEvent -= OnLiveContentEvent;
_metadataLiveSource.LiveStatusEvent -= OnLiveStatusEvent;
_metadataLiveSource.Close();
_metadataLiveSource = null;
}
ClearAllFlags();
ResetSelections();
ItemPickerForm form = new ItemPickerForm();
form.KindFilter = Kind.Metadata;
form.AutoAccept = true;
form.Init(Configuration.Instance.GetItems());
// Ask user to select a metadata device
if (form.ShowDialog() == DialogResult.OK)
{
_selectItem1 = form.SelectedItem;
deviceSelectButton.Text = _selectItem1.Name;
_metadataLiveSource = new MetadataLiveSource(_selectItem1);
try
{
_metadataLiveSource.LiveModeStart = true;
_metadataLiveSource.Init();
_metadataLiveSource.LiveContentEvent += OnLiveContentEvent;
_metadataLiveSource.LiveStatusEvent += OnLiveStatusEvent;
_metadataLiveSource.ErrorEvent += OnErrorEvent;
_count = 0;
labelCount.Text = _count.ToString(CultureInfo.InvariantCulture);
buttonPause.Enabled = true;
}
catch (Exception ex)
{
MessageBox.Show(@"Could not Init:" + ex.Message);
_metadataLiveSource = null;
}
}
else
{
_selectItem1 = null;
deviceSelectButton.Text = @"Select Metadata device ...";
labelCount.Text = "0";
labelSize.Text = "";
buttonPause.Enabled = false;
}
}
/// <summary>
/// This event is called when metadata is available
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnLiveContentEvent(MetadataLiveSource sender, MetadataLiveContent e)
{
if (InvokeRequired)
{
// Make sure we execute on the UI thread before updating UI Controls
BeginInvoke(new Action(() => OnLiveContentEvent(sender, e)));
}
else
{
if (e.Content != null)
{
// Display the received metadata
var metadataXml = e.Content.GetMetadataString();
textBoxMetadataOutput.Text = metadataXml;
labelSize.Text = metadataXml.Length.ToString(CultureInfo.InvariantCulture);
_count++;
labelCount.Text = "" + _count;
}
}
}
/// <summary>
/// This event is called when some exception has occurred
/// </summary>
/// <param name="sender"></param>
/// <param name="exception"></param>
private void OnErrorEvent(MetadataLiveSource sender, Exception exception)
{
if (InvokeRequired)
{
// Make sure we execute on the UI thread before updating UI Controls
BeginInvoke(new Action(() => OnErrorEvent(sender, exception)));
}
else
{
// Display the error
labelSize.Text = @"Error!";
if (exception is CommunicationMIPException)
{
textBoxMetadataOutput.Text = @"Connection lost to server ...";
}
else
{
textBoxMetadataOutput.Text = exception.ToString();
}
}
}
