public void UpdateTagInfo(NFCTag tag)
{
string technologiesString = string.Empty;
NFCTechnology[] technologies = tag.Technologies;
int length = technologies.Length;
for (int i = 0; i < length; i++)
{
if (i > 0)
{
technologiesString += ", ";
}
technologiesString += technologies[i].ToString();
}
string maxWriteSizeString = string.Empty;
if (tag.MaxWriteSize > 0)
{
maxWriteSizeString = tag.MaxWriteSize + " bytes";
}
else
{
maxWriteSizeString = "Unknown";
}
string tagInfo = string.Format(TAG_INFO_FORMAT, tag.ID, technologiesString, tag.Manufacturer, tag.Writable, maxWriteSizeString);
tagInfoContentLabel.text = tagInfo;
}
private static void MessageReceived(ITagInfo tagInfo)
{
string id = tagInfo.SerialNumber;
//Messages reader
string message = "";
if (!tagInfo.IsEmpty)
{
foreach (NFCNdefRecord record in tagInfo.Records)
{
message += record.Message != null?record.Message.ToString() : " ";
}
}
var tag = new NFCTag()
{
TagId = id,
MeetingCode = message
};
foreach (var handler in OnMessageReceivedHandler)
{
handler(tag);
}
}
private void _nfcReader_TagFound(NFCTag tag)
{
// we get called twice for some reason.
if (_busy)
{
return;
}
if (ShuttingDown)
{
return;
}
Log(" _nfcReader_TagFound");
if (_currentTag != null && _currentTag.UID == tag.UID)
{
return;
}
_currentTag = tag;
CurrentDevice = new NFCHoloDevice(_currentTag);
foreach (Delegate d in DeviceArrived.GetInvocationList())
{
ISynchronizeInvoke syncer = d.Target as ISynchronizeInvoke;
if (syncer != null)
{
syncer.BeginInvoke(d, new NFCHoloDevice[] { CurrentDevice });
}
else
{
d.DynamicInvoke(CurrentDevice);
}
}
}
private void theForm_TagFound(NFCTag Tag)
{
if (Tag != null)
{
tATR.Text = Tag.ATR;
tUID.Text = Tag.UID;
tType.Text = Tag.GetType().Name;
}
}
private void OnMessageReceived(NFCTag tag)
{
TagId_Label.Text = "ID: " + tag.TagId;
//TODO
currentTag = tag.TagId;
Check_Button.IsEnabled = true;
Check_Button.BackgroundColor = Color.FromHex("008B8B");;
ImageWait.IsVisible = false;
ImageOk.IsVisible = true;
StartAgain();
}
private void OnMessagePublished(NFCTag tag)
{
ImageWait.IsVisible = false;
ImageOk.IsVisible = true;
//TagId_Label.Text = tag.TagId;
//EventId_Label.Text = tag.MeetingCode;
NFCController.StopAll();
SendRequest(tag.TagId);
//Application.Current.MainPage.DisplayAlert("Success", "Succesfully assigned tag " + tag.TagId + " to " + currentPosition.RoomName + "/" + currentPosition.PositionNumber, "Ok");
currentPosition = null;
GeneratePickerElements();
NFCController.StartListening();
}
private void bDisconnect_Click(object sender, EventArgs e)
{
if (!NFCHandler.IsInitialized)
{
return;
}
if (theTag != null)
{
tATR.Text = tUID.Text = tType.Text = tData.Text = "";
theTag.Dispose();
theTag = null;
}
}
private void bConnect_Click(object sender, EventArgs e)
{
if (!NFCHandler.IsInitialized)
{
return;
}
theTag = NFCHandler.Readers[dReaders.SelectedIndex].Connect();
if (theTag != null)
{
tATR.Text = theTag.ATR;
tUID.Text = theTag.UID;
tType.Text = theTag.GetType().Name;
}
}
private async void Button_Click(object sender, RoutedEventArgs e)
{
getid.IsEnabled = false;
NFCHandler.Init();
dReaders.Items.Clear();
foreach (NFCReader rdr in NFCHandler.Readers)
{
dReaders.Items.Add(rdr.Name);
}
if (dReaders.Items.Count > 0)
{
dReaders.SelectedIndex = 0;
}
if (!NFCHandler.IsInitialized)
{
MessageBox.Show("card not installed");
getid.IsEnabled = true;
}
else if (dReaders.Items.Count == 0)
{
MessageBox.Show("Reader Not Found!!!"); getid.IsEnabled = true;
}
else
{
while (true)
{
theTag = NFCHandler.Readers[dReaders.SelectedIndex].Connect();
if (theTag != null)
{
var tagId = (BitConverter.ToUInt32(theTag.bUID, 0) % 10000000); //this is an example to play with your card number, if you are developing a system, you may need something like this
//var tagId = theTag.bUID; //original tagid
//var tagId = (BitConverter.ToUInt32(theTag.bUID, 0); //sometimes some rfid uses this format to show tag number
idno.Text = tagId.ToString();
refno.Text = theTag.ATR.ToString();
await Task.Delay(2000);
NFCHandler.Release();
getid.IsEnabled = true;
break;
}
}
}
}
private void _nfcReader_TagLost()
{
Log("_nfcReader_TagLost");
if (DeviceDeparted != null)
{
foreach (Delegate d in DeviceDeparted.GetInvocationList())
{
ISynchronizeInvoke syncer = d.Target as ISynchronizeInvoke;
if (syncer != null)
{
syncer.BeginInvoke(d, new HoloDevice[] { CurrentDevice });
}
else
{
d.DynamicInvoke(CurrentDevice);
}
}
}
_busy = false;
_currentTag = null;
CurrentDevice = null;
}
private static void OnMessageReceived(NFCTag tag)
{
Redirect();
}
public void OnNFCTagDetected(NFCTag tag)
{
view.UpdateTagInfo(tag);
}
