MATLAB: How to redirect standard input and standard output using .Net System.Dia​gnostics.P​rocess

Question

I'm working on some optimisation code and have recently moved away from using the system() function to open xfoil.exe and direct input and output files,

cmd = sprintf('cd %s && xfoil.exe < xfoil.inp > xfoil.out &',working_directory);
[status,result] = system(cmd);

and I am now attempting to complete the same operations using:

process = System.Diagnostics.Process();
process.StartInfo.FileName = 'xfoil.exe';
process.StartInfo.Arguments = %not sure what to put here%;
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.CreateNoWindow = false;
process.Start();

I'm not very experienced with coding in general, so I'm struggling a bit here, but I really need some help to figure out how to redirect standard input and standard output to my two files (xfoil.inp and xfoil.out) using .Net System.Diagnostics.Process.

Answer 1

You can try this. You may have to choose the option on how to decide when xfoil.exe has finished reading.

process = System.Diagnostics.Process();
process.StartInfo.FileName = 'xfoil.exe';
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.CreateNoWindow = false;
process.Start();
stdin = process.StandardInput;
stdout = process.StandardOutput;
fid = fopen('xfoil.inp','r'); % read the xfoil.inp
txt = fread(fid,'*char');
fclose(fid);
stdin.Write(txt); % send the input to xfoil.exe
out = stdout.ReadToEndAsync;
% wait for xfoil.exe to finish processing
% option 1
pause(1); % pause for a predefined amount of time
% option 2
% wait until xfoil.exe has terminated
while(~process.HasExited)
    pause(1);
end
try
process.Kill; % kill the process if needed.
catch
end
xfoil_out = char(out.Result);