I have an issue with getting some console standard output from a small long running console app spawned by my application.
My app starts the console app and the console app will stay alive listening on a port for the duration of my applications lifetime (or until explicitly killed).
When the console app starts, it outputs a port number that it is listening on, I need to asyncronously grab that port number and use it elsewhere in the app. Problem is, my event handler to get the output data is never called. I am sure there must be something trivial I am forgetting to do.
ProcessStartInfo si = new ProcessStartInfo();
si.FileName = theFileName;
si.Arguments = theargs;
si.UseShellExecute = false;
si.RedirectStandardOutput = true;
si.CreateNoWindow = true;
_process = Process.Start(si);
_process.OutputDataReceived += (sender, args) =>
{
//Parse the args.Data string for the port number.
};
_process.BeginOutputReadLine(); // My handler never gets called.
// I don't want to call _process.WaitForExit() here as this is a long running process.
