private async void ScanAsync(CancellationToken token)
{
try
{
IsRunning = true;
_results.Clear();
using (var master = ModbusAdapters.GetFactory().Create())
{
try
{
var stream = master.Master.Transport.GetStreamResource();
stream.DiscardInBuffer();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
ProgressValue = 0;
ProgressMax = (byte)(EndAddress - StartAddress);
for (byte slaveAddress = StartAddress; slaveAddress < EndAddress; slaveAddress++)
{
CurrentSlaveAddress = slaveAddress;
if (token.IsCancellationRequested)
{
break;
}
bool wasFound = false;
string reason;
try
{
await master.Master.ReadHoldingRegistersAsync(slaveAddress, 1000, 1);
reason = "Reading Holding Register succeeded.";
wasFound = true;
}
catch (TimeoutException ex)
{
reason = ex.Message;
//Not found
}
catch (SlaveException ex)
{
//We got sopme sort of slave exception.
reason = ex.Message;
wasFound = true;
}
catch (Exception ex)
{
reason = ex.Message;
}
//Create the result.
var result = new ResultViewModel()
{
SlaveAddress = slaveAddress,
WasFound = wasFound,
Reason = reason,
};
_results.Add(result);
ProgressValue++;
}
}
if (_results.Count != 0)
{
string message;
var successfulCount = _results.Count(r => r.WasFound);
if (successfulCount == 0)
{
message = "No Modbus slaves were found.";
}
else if (successfulCount == 1)
{
message = "1 Modbus slave was found.";
}
else
{
message = $"{successfulCount} Modbus slaves were found.";
}
MessageBox.Show(message, "Scan Result");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
IsRunning = false;
_cts = null;
CommandManager.InvalidateRequerySuggested();
}