public async Task <string> ReadError()
{
var q = await TaskExt.FromEvent <DataReceivedEventArgs>(
handler => process.ErrorDataReceived += new DataReceivedEventHandler(handler),
() =>
{
if (!startedErrorSampling)
{
startedErrorSampling = true;
process.BeginErrorReadLine();
}
},
handler => process.ErrorDataReceived -= new DataReceivedEventHandler(handler),
CancellationToken.None);
return(q.Data);
}
public async Task <string> ReadOutput(TimeSpan?timeout = null)
{
CancellationToken cancellationToken = CancellationToken.None;
if (timeout.HasValue)
{
cancellationToken = new CancellationTokenSource(timeout.Value).Token;
}
var q = await TaskExt.FromEvent <DataReceivedEventArgs>(
handler => process.OutputDataReceived += new DataReceivedEventHandler(handler),
() =>
{
if (!startedOutputSampling)
{
startedOutputSampling = true;
process.BeginOutputReadLine();
}
},
handler => process.OutputDataReceived -= new DataReceivedEventHandler(handler),
cancellationToken);
return(q.Data);
}
public static async Task ReadPort(SerialPort port, CancellationToken token)
{
while (true)
{
token.ThrowIfCancellationRequested();
await TaskExt.FromEvent <SerialDataReceivedEventHandler, SerialDataReceivedEventArgs>(
(complete, cancel, reject) => // get handler
(sender, args) => complete(args),
handler => // subscribe
port.DataReceived += handler,
handler => // unsubscribe
port.DataReceived -= handler,
(complete, cancel, reject) => // start the operation
{ if (port.BytesToRead != 0)
{
complete(null);
}
},
token);
Console.WriteLine("Received: " + port.ReadExisting());
}
}
