public static async Task <int> Start(string programPath, string arguments, string workingDirectory, Action <string, bool> outputDelegate, CancellationToken?cancelToken = null)
{
var action = new ProcessAction {
ProgramPath = programPath, Arguments = arguments, WorkingDirectory = workingDirectory
};
return(await Start(action, outputDelegate, cancelToken));
}
public static async Task <int> Start(ProcessAction action, Action <string, bool> outputDelegate, CancellationToken?cancelToken = null)
{
if (string.IsNullOrWhiteSpace(action.ProgramPath))
{
throw new NullReferenceException($"One of the action arguments is null or empty");
}
if (!File.Exists(action.ProgramPath))
{
throw new FileNotFoundException($"Cannot find {action.ProgramPath}");
}
if (_runningProcesses == null)
{
_runningProcesses = new ConcurrentDictionary <Guid, Process>();
}
var processStartInfo = new ProcessStartInfo();
processStartInfo.FileName = action.ProgramPath;
processStartInfo.WorkingDirectory = action.WorkingDirectory;
processStartInfo.Arguments = action.Arguments;
processStartInfo.UseShellExecute = false;
processStartInfo.WindowStyle = ProcessWindowStyle.Hidden;
processStartInfo.RedirectStandardError = true;
processStartInfo.RedirectStandardOutput = true;
using (var p = Process.Start(processStartInfo))
{
p.BeginErrorReadLine();
p.BeginOutputReadLine();
p.OutputDataReceived += new DataReceivedEventHandler((sender, e) => { if (!string.IsNullOrWhiteSpace(e.Data))
{
outputDelegate(e.Data, false);
}
});
p.ErrorDataReceived += new DataReceivedEventHandler((sender, e) => { if (!string.IsNullOrWhiteSpace(e.Data))
{
outputDelegate(e.Data, true);
}
});
if (!_runningProcesses.TryAdd(action.Id, p))
{
throw new Exception("Could not persist process to memory");
}
//wait idenfinitely for the process to finish
while (!p.HasExited)
{
await Task.Delay(10 * 1000);
}
return(p.ExitCode);
}
}
public static void Cancel(ProcessAction action)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (!_runningProcesses.TryGetValue(action.Id, out Process runningProcess))
{
throw new Exception($"Failed to find process that exist with Id {action.Id}");
}
try
{
runningProcess.Kill();
}
catch (Exception ex)
{
throw new Exception($"Failed to kill process with id {action.Id}", ex);
}
}
public static bool TryCancel(ProcessAction action)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (!_runningProcesses.TryGetValue(action.Id, out Process runningProcess))
{
return(false);
}
try
{
runningProcess.Kill();
return(true);
}
catch (Exception)
{
return(false);
}
}