Process.WaitForExit() triggers too fast

Question

Here is the code I use to run extern executable (unmanaged) from c# code:

static void Solve()
            {
                Process newProc = new Process();
             


        

Answer 1

Your process is probably failing in an unforeseen way. You can only know to read the Output and Error stream and store it in a file (or write it to the console, or eventlog)

Remember that if you need to read the Error AND the Output streams simultanuously to do it async/eventdriven. Otherwise the streams will block and not produce any output or not the output you're after.

StreamWriter errorReporter = new StreamWriter("SOLVER-OUTPUT-ERROR.txt", true);

newproc.StartInfo.RedirectStandardOutput = true;
newproc.StartInfo.RedirectStandardError = true;

newproc.OutputDataReceived += (sender, args) => errorReporter.WriteLine(args.Data);
newproc.ErrorDataReceived += (sender, args) => errorReporter.WriteLine(args.Data);
newproc.StartInfo.UseShellExecute=false;

newProc.Start();
newProc.BeginOutputReadLine();
newProc.BeginErrorReadLine();

newProc.WaitForExit();

errorReporter.Close();