starting some Python script from C#
Gerard Flanagan
grflanagan at yahoo.co.uk
Sun May 28 07:19:54 EDT 2006
> "Gerard Flanagan" <grflanagan at yahoo.co.uk> je napisao u poruci interesnoj
> grupi:1148728940.440692.166330 at i39g2000cwa.googlegroups.com...
> > tatamata wrote:
> >> Hello.
> >>
> >> How can I run some Python script within C# program?
> >>
> >
> > ---------------------------------------------------------------------------------
> > ProcessStartInfo startInfo;
> > Process process;
> > string directory;
> > string pyArgs;
> > string script;
> >
> > startInfo = new ProcessStartInfo("python");
> > startInfo.WorkingDirectory = directory;
> > startInfo.Arguments = script + " " + pyArgs;
> > startInfo.UseShellExecute = false;
> > startInfo.CreateNoWindow = true;
> > startInfo.RedirectStandardOutput = true;
> > startInfo.RedirectStandardError = true;
> >
> > process = new Process();
> > process.StartInfo = startInfo;
> > process.Start();
> >
> > string s;
> > while ((s = process.StandardOutput.ReadLine()) != null)
> > {
> > //do something with s
> > }
> > ---------------------------------------------------------------------------------
> >
tatamata wrote:
> Hello. I tried to implement ypour suggestion, but an error apears:
> "Exception System.ComponentModel.Win32Exception was thrown in debugee:
> The specified executable is not a valid Win32 application.
>
> namespace CS_script
> {
> class MainClass
> {
> public static void Main(string[] args)
> {
>
> System.Diagnostics.ProcessStartInfo psi =new
> System.Diagnostics.ProcessStartInfo();
> psi.FileName="my_script.py";
> psi.WorkingDirectory=Environment.CurrentDirectory;
> psi.RedirectStandardOutput = true;
> psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
> psi.UseShellExecute = false;
> psi.CreateNoWindow = true;
>
> System.Diagnostics.Process script;
> script = System.Diagnostics.Process.Start(psi);
>
> System.IO.StreamReader myOutput = script.StandardOutput;
> script.WaitForExit(2000);
> if (script.HasExited)
> {
> string output = myOutput.ReadToEnd();
> //this.processResults.Text = output;
> }
> MessageBox.Show("finished!");
> }
> }
> }
>
> When running the program, I have the following error:
>
> "Exception System.ComponentModel.Win32Exception was thrown in debugee:
> The specified executable is not a valid Win32 application.
>
> StartWithCreateProcess()
> Start()
> Start()
> Main() - c:\Documents and Settings\Zlatko\My Documents\SharpDevelop
> Projects\CS_script\CS_script\Main.cs:32,5 "
>
I have no means of running C# programs at present and can't claim much
expertise in any case. A guess is that a "valid Win32 application"
means an '.exe' file, not a '.py' file.
You are assuming that a Process object is as smart as the command
interpreter ('cmd.exe') and will know to use 'python.exe' for a file
with a 'py' extension?
What happens if you use 'python.exe' (or 'cmd.exe') as your file and
the script name as argument as in the code I posted?
Gerard
(PS. This group prefers that one doesn't top-post)
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