C# Process does not accept my parameters

Question

I think the C# process class has a problem with accepting < or > characters when they are passed as paramaters.

When I call the following code, the executable returns me an error indicating that I passed more than one argument.

 proc = new Process();
 proc.StartInfo.FileName = this.spumux.SpumuxExe;
 proc.StartInfo.Arguments = "menu.xml < menu.mpg > newmenu.mpg";
 proc.StartInfo.UseShellExecute = false;
 proc.StartInfo.CreateNoWindow = true;
 proc.StartInfo.RedirectStandardOutput = true;
 proc.StartInfo.RedirectStandardError = true;
 proc.EnableRaisingEvents = true;
 proc.OutputDataReceived += new DataReceivedEventHandler(OutputHandler);
 proc.ErrorDataReceived += new DataReceivedEventHandler(OutputHandler);
 proc.Exited += new EventHandler(ProcExited);
 proc.Start();
 proc.BeginOutputReadLine();
 proc.BeginErrorReadLine();

This code normally worked with every other executable I tried so far without any problems. So it's gotta do something with <, > characters

Any ideas?

Femaref · Accepted Answer · 2011-01-24 16:54:26Z

5

The angle brackets in this case mean redirecting the input/output, which is done by cmd.exe, not by the started process.

You have two options:

call cmd.exe instead of your executable, and supply the executable as an argument (and the arguments for your exe as well)
redirect standard input/output yourself.

answered Jan 24, 2011 at 16:54

Femaref

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1 Comment

Mert Sevinc Over a year ago

Ok but why? I am calling ffmpeg.exe just like that and it works with the arguments I supply. Why would I call cmd.exe now?

Sasha Reminnyi · Accepted Answer · 2011-01-24 16:53:38Z

0

try "menu.xml \< menu.mpg \> newmenu.mpg". And you are adding 5 args. To make it one - do: "\"menu.xml \< menu.mpg \> newmenu.mpg\""

answered Jan 24, 2011 at 16:53

Sasha Reminnyi

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Comments

csharptest.net · Accepted Answer · 2011-01-24 16:58:48Z

0

I'm not sure what your attempting to accomplish here. Are you trying to redirect IO with '<' and '>', or are you trying to pass these as arguments?

You can redirect IO by running CMD.exe with the /C option:

proc.StartInfo.FileName = @"C:\Windows\System32\Cmd.exe";
proc.StartInfo.Arguments = "/C \"" + this.spumux.SpumuxExe + " menu.xml < menu.mpg > newmenu.mpg\"";

answered Jan 24, 2011 at 16:58

csharptest.net

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1 Comment

Mert Sevinc Over a year ago

I am only trying to pass arguments. And this code works fine with other executables with other types of arguments. It just does not seem to accept "<", ">"

Mert Sevinc · Accepted Answer · 2011-01-24 17:59:56Z

0

I was only be able to solve this issue by creating a batch file, where I pass the arguments without "<", ">"

answered Jan 24, 2011 at 17:59

Mert Sevinc

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