private void WriteTag_ValueChanged(object sender, OpcDataChangeEventArgs e)
{
var monitoredNode = (OpcMonitoredItem)sender;
var nodeValue = (bool)Client.ReadNode(monitoredNode.NodeId).Value;
int stationNum = int.Parse(monitoredNode.NodeId.ToString()
.Remove(0, 42).Substring(
monitoredNode.NodeId.ToString()
.Remove(0, 42).IndexOf("_", 0, StringComparison.Ordinal) + 1, 1));
if (!nodeValue) // False
{
return;
}
#region Write to OPC UA
var tagNodeId = new OpcNodeId("2:RFID_Communications.RFID Readers.Station_" + stationNum + "_Tag");
var reader = Program.RfidReaders.FirstOrDefault(i => i.ReaderName == "Station" + stationNum);
if (reader == null)
{
return;
}
var guid = Program.RfidReaders.First(i => i.ReaderName == "Station" + stationNum).WriteEpc();
Client.WriteNode(monitoredNode.NodeId, false);
Client.WriteNode(tagNodeId, guid);
#endregion Write to OPC UA
}
/// <summary>
/// Read Tag Value when OPC triggered to true
/// </summary>
/// <param name="sender">Of type <see cref="OpcMonitoredItem"/></param>
/// <param name="e"> Not Implimented</param>
private static void ReadTag_ValueChanged(object sender, OpcDataChangeEventArgs e)
{
var monitoredNode = (OpcMonitoredItem)sender;
var nodeValue = (bool)Client.ReadNode(monitoredNode.NodeId).Value;
int stationNum = int.Parse(monitoredNode.NodeId.ToString()
.Remove(0, 42).Substring(
monitoredNode.NodeId.ToString()
.Remove(0, 42).IndexOf("_", 0, StringComparison.Ordinal) + 1, 1));
Console.WriteLine("Node {0} Value Changed: {1}", monitoredNode.NodeId, nodeValue);
if (!nodeValue || Program.RfidReaders.Count == 0)
{
return;
}
var reader = Program.RfidReaders.FirstOrDefault(i => i.ReaderName == ("Station" + stationNum));
if (reader == null)
{
return;
}
var epcId = reader.ReadEpc();
if (epcId == null)
{
Client.WriteNode("2:RFID_Communications.RFID Readers.Station_" + stationNum + "_Tag", "");
}
else
{
Client.WriteNode("2:RFID_Communications.RFID Readers.Station_" + stationNum + "_Tag", epcId);
}
Client.WriteNode(monitoredNode.NodeId, false);
}
