C# process with arguments not working

Question

ProcessStartInfo psi = new ProcessStartInfo();
psi.CreateNoWindow = false;
psi.UseShellExecute = false;
psi.FileName = "convert.exe";
psi.WorkingDirectory = @"C:\Users\Der\Downloads\Wunderground_API_Test\Wunderground_API_Test\Wunderground_API_Test\";
psi.Arguments = " icone.gif -fuzz 10% -transparent white icone.ico";
Process.Start(psi);

If I try to run this nothing happens but if go to that path and type convert.exe icone.gif -fuzz10% -transparent10% white icone.ico it works. What am I doing wrong?

Where is "convert.exe" relative to your executable? Its likely just not finding the file. Do you get any exceptions? — BradleyDotNET, Jun 13 '14 at 17:54
Can you capture the output as [described here](http://stackoverflow.com/a/15032982/578411) and let us know if that shows anything? — rene, Jun 13 '14 at 18:08
I removed the space and nothing changed and also if I try icone.gif icone.ico the error changes to invalid parameter icone.ico — Aman, Jun 13 '14 at 18:20

score 2 · Answer 1 · answered Jun 13 '14 at 19:10

I gave up and did a bat file and it works.

        var p = new System.Diagnostics.Process();
        p.StartInfo.FileName = @"C:\Users\LL\Downloads\Wunderground_API_Test\Wunderground_API_Test\Wunderground_API_Test\icone.bat";
        p.StartInfo.WorkingDirectory = @"C:\Users\LL\Downloads\Wunderground_API_Test\Wunderground_API_Test\Wunderground_API_Test\";
        p.StartInfo.RedirectStandardOutput = true;
        p.StartInfo.UseShellExecute = false;
        p.StartInfo.CreateNoWindow = true;
        p.Start();
        p.WaitForExit();

score 1 · Answer 2 · answered Jun 13 '14 at 18:22

1

So, trying this out on my machine in LINQPad, I think it might be a misunderstanding of a working directory. The working directory is not the location of the file, it's where the file should think it's being run from. Try removing that line and specifying the complete path in FileName. That worked for me.

answered Jun 13 '14 at 18:22

Kyle W

3,702
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The error the OP gets is from the windows convert.exe tool that `Converts a FAT volume to NTFS.`.... – rene Jun 13 '14 at 18:29

score 1 · Accepted Answer · edited May 23 '17 at 10:32

1

This is because C# passes StartInfo parameters as Unicode and your program "convert.exe" does not handle intepretting the Unicode arguments. While calling it through a batch file the way you are doing it does not pass the parameters as Unicode.

Below link looks like addresses your issue. With code examples.

Application started by Process.Start() isn't getting arguments

edited May 23 '17 at 10:32

Community

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answered Jun 27 '14 at 18:01

CodeCowboyOrg

2,983
1
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C# process with arguments not working

3 Answers3