public Task <WriteResult> WriteTag(NdefLibrary.Ndef.NdefMessage message, System.Threading.CancellationToken cancellationToken)
{
return(WriteTag(message, cancellationToken, TimeSpan.FromTicks(0)));
}
public Task <WriteResult> WriteTag(NdefLibrary.Ndef.NdefMessage message, TimeSpan timeout)
{
return(WriteTag(message, CancellationToken.None, timeout));
}
public void WriteTag(NdefLibrary.Ndef.NdefMessage message)
{
if (_droidTag == null)
{
throw new Exception("Tag Error: No Tag to write, register to NewTag event before calling WriteTag()");
}
Ndef ndef = GetNdef(_droidTag);
if (ndef == null)
{
throw new Exception("Tag Error: NDEF not supported");
}
try
{
ndef.Connect();
RaiseTagConnected(_nfcTag);
}
catch
{
throw new Exception("Tag Error: No Tag nearby");
}
if (!ndef.IsWritable)
{
ndef.Close();
throw new Exception("Tag Error: Tag is write locked");
}
int size = message.ToByteArray().Length;
if (ndef.MaxSize < size)
{
ndef.Close();
throw new Exception("Tag Error: Tag is too small");
}
try
{
List <Android.Nfc.NdefRecord> records = new List <Android.Nfc.NdefRecord>();
for (int i = 0; i < message.Count; i++)
{
if (message[i].CheckIfValid())
{
records.Add(new Android.Nfc.NdefRecord(Android.Nfc.NdefRecord.TnfWellKnown, message[i].Type, message[i].Id, message[i].Payload));
}
else
{
throw new Exception("NDEFRecord number " + i + "is not valid");
}
}
;
Android.Nfc.NdefMessage msg = new Android.Nfc.NdefMessage(records.ToArray());
ndef.WriteNdefMessage(msg);
}
catch (TagLostException tle)
{
throw new Exception("Tag Lost Error: " + tle.Message);
}
catch (IOException ioe)
{
throw new Exception("Tag IO Error: " + ioe.ToString());
}
catch (Android.Nfc.FormatException fe)
{
throw new Exception("Tag Format Error: " + fe.Message);
}
catch (Exception e)
{
throw new Exception("Tag Error: " + e.ToString());
}
finally
{
ndef.Close();
RaiseTagTagDisconnected(_nfcTag);
}
}
