Question

I’m trying to run a fortran executable with Process.Start and it is not working.

Process proc = new Process();
string args = "<C:\\file.in> C:\\file.out";
proc.StartInfo = new ProcessStartInfo(AppName, args);
proc.Start();

if I paste those arguments into a command window the application runs as expected. proc.Start() does not run as expected.

Any ideas how I can view what Start is actually passing as arguments? My gut feeling is that this is a quotes issue.

The executable launches and hangs, so I’m confident the AppName is getting passed in correctly, it looks like an argument problem.

I tried setting the WorkingDirectory to that of the input and output files as suggested in this question: process.start() arguments but that did not work.

Answer 1

Redirection with the < and > command line operators is a feature that’s implemented by the command line processor. Which is cmd.exe. Use its /c argument to execute just a single command:

string args = "/c " + AppName + " < C:\\file.in > C:\\file.out";
proc.StartInfo = new ProcessStartInfo("cmd.exe", args);
proc.Start();