private void ConnectionFailed(string type, string exceptionMessage)
{
ClientScript?.connectionFailed();
UpdateStatus($"Failed to connect to device using {type}: {exceptionMessage}", UpdateType.Alarm);
}
public Task <bool> Connect(string connectionString)
{
return(Task.Factory.StartNew(() => {
try
{
Dictionary <string, string> parameters = connectionString.ParseKeyValuePairs();
string frameFormat, transport, setting;
if (!parameters.TryGetValue("frameFormat", out frameFormat) || string.IsNullOrWhiteSpace(frameFormat))
{
throw new ArgumentException("Connection string is missing \"frameFormat\".");
}
if (!parameters.TryGetValue("transport", out transport) || string.IsNullOrWhiteSpace(transport))
{
throw new ArgumentException("Connection string is missing \"transport\".");
}
if (!parameters.TryGetValue("unitID", out setting) || !byte.TryParse(setting, out m_unitID))
{
throw new ArgumentException("Connection string is missing \"unitID\" or value is invalid.");
}
bool useIP = false;
bool useRTU = false;
switch (frameFormat.ToUpperInvariant())
{
case "RTU":
useRTU = true;
break;
case "TCP":
useIP = true;
break;
}
if (useIP)
{
int port;
if (!parameters.TryGetValue("port", out setting) || !int.TryParse(setting, out port))
{
throw new ArgumentException("Connection string is missing \"port\" or value is invalid.");
}
if (transport.ToUpperInvariant() == "TCP")
{
string hostName;
if (!parameters.TryGetValue("hostName", out hostName) || string.IsNullOrWhiteSpace(hostName))
{
throw new ArgumentException("Connection string is missing \"hostName\".");
}
return ConnectTcpModbusMaster(hostName, port);
}
string interfaceIP;
if (!parameters.TryGetValue("interface", out interfaceIP))
{
interfaceIP = "0.0.0.0";
}
return ConnectUdpModbusMaster(interfaceIP, port);
}
string portName;
int baudRate;
int dataBits;
Parity parity;
StopBits stopBits;
if (!parameters.TryGetValue("portName", out portName) || string.IsNullOrWhiteSpace(portName))
{
throw new ArgumentException("Connection string is missing \"portName\".");
}
if (!parameters.TryGetValue("baudRate", out setting) || !int.TryParse(setting, out baudRate))
{
throw new ArgumentException("Connection string is missing \"baudRate\" or value is invalid.");
}
if (!parameters.TryGetValue("dataBits", out setting) || !int.TryParse(setting, out dataBits))
{
throw new ArgumentException("Connection string is missing \"dataBits\" or value is invalid.");
}
if (!parameters.TryGetValue("parity", out setting) || !Enum.TryParse(setting, out parity))
{
throw new ArgumentException("Connection string is missing \"parity\" or value is invalid.");
}
if (!parameters.TryGetValue("stopBits", out setting) || !Enum.TryParse(setting, out stopBits))
{
throw new ArgumentException("Connection string is missing \"stopBits\" or value is invalid.");
}
return ConnectSerialModbusMaster(useRTU, portName, baudRate, dataBits, parity, stopBits);
}
catch (Exception ex)
{
ClientScript?.connectionFailed();
UpdateStatus($"Failed to connect to device: {ex.Message}", UpdateType.Alarm);
}
return false;
}));
}
