CODEWITHSUNDEEP
c#.net
Joan Venge
Joan Venge

Reputation: 330862

How to shell execute a file in C#?

I tried using the Process class as always but that didn't work. All I am doing is trying to run a Python file like someone double clicked it.

Is it possible?

EDIT:

Sample code:

string pythonScript = @"C:\callme.py";

string workDir = System.IO.Path.GetDirectoryName ( pythonScript );

Process proc = new Process ( );
proc.StartInfo.WorkingDirectory = workDir;
proc.StartInfo.UseShellExecute = true;
proc.StartInfo.FileName = pythonScript;
proc.StartInfo.Arguments = "1, 2, 3";

I don't get any error, but the script isn't run. When I run the script manually, I see the result.

Upvotes: 5

Views: 9556

Answers (3)

David Anderson
David Anderson

Reputation: 8606

You forgot proc.Start() at the end. The code you have should work if you call Start().

Upvotes: 3

Justin
Justin

Reputation: 403

Here's my code for executing a python script from C#, with a redirected standard input and output ( I pass info in via the standard input), copied from an example on the web somewhere. Python location is hard coded as you can see, can refactor.

    private static string CallPython(string script, string pyArgs, string workingDirectory, string[] standardInput)
    {

        ProcessStartInfo startInfo;
        Process process;

        string ret = "";
        try
        {

            startInfo = new ProcessStartInfo(@"c:\python25\python.exe");
            startInfo.WorkingDirectory = workingDirectory;
            if (pyArgs.Length != 0)
                startInfo.Arguments = script + " " + pyArgs;
            else
                startInfo.Arguments = script;
            startInfo.UseShellExecute = false;
            startInfo.CreateNoWindow = true;
            startInfo.RedirectStandardOutput = true;
            startInfo.RedirectStandardError = true;
            startInfo.RedirectStandardInput = true;

            process = new Process();
            process.StartInfo = startInfo;


            process.Start();

            // write to standard input
            foreach (string si in standardInput)
            {
                process.StandardInput.WriteLine(si);
            }

            string s;
            while ((s = process.StandardError.ReadLine()) != null)
            {
                ret += s;
                throw new System.Exception(ret);
            }

            while ((s = process.StandardOutput.ReadLine()) != null)
            {
                ret += s;
            }

            return ret;

        }
        catch (System.Exception ex)
        {
            string problem = ex.Message;
            return problem;
        }

    }

Upvotes: 7

dance2die
dance2die

Reputation: 36895

Process.Start should work. if it doesn't, would you post your code and the error you are getting?

Upvotes: 5

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