Passing Command-line arguments from C# to a external exe

Question

I have a similar problem as already solved here. But I can not figure out, how the problem got solved. I have a program that get paramter the define a input and output file. Running this from Commend line, all works fine:

D:\Tools\siftDemoV4>siftWin32.exe -display < D:\tmp\SrcPgm\image000.pbm > result.pbm

But running via System.Diagnostics.Process, does not work. I get the error "Invalid command line argument: <" and after this a System.InvalidOperationException occurs.

var process = new Process()
{
   StartInfo =
   {
     Arguments = string.Format(@"-display < {0} > {1}", configuration.Source,
       configuration.Destination),
     FileName = configuration.PathToExternalSift,
     RedirectStandardError = true,
     RedirectStandardInput = true,
     RedirectStandardOutput = true,
     UseShellExecute = false,
     CreateNoWindow = true,
     ErrorDialog = false,
   }
};

process.EnableRaisingEvents = true;
process.Exited += OnProcessExited;
process.OutputDataReceived += new DataReceivedEventHandler(process_OutputDataReceived);
process.ErrorDataReceived += new DataReceivedEventHandler(process_ErrorDataReceived);
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();

I already tried to write to process.StandardInput after I called process.Start(), but when using the debugger, the external program was sometime already finished (HasExited==true).

Can anybody explain how I can pass this special "<" ">" parameters to the programm?

Best Greetings!

By the way, I checked the path multiple time, they are correct.

If you already read the other thread, why didn't you read the answer to your problem, too? Hint: it's the first paragraph. And why < and > don't work is explained in the last one. — Nuffin
– Nuffin, Commented Jan 23, 2012 at 21:00
Everything after your < is no longer an argument to your application. Those are "switches" (so to speak) for the command line processor. — user7116
– user7116, Commented Jan 23, 2012 at 21:17
possible duplicate of Piping in a file on the command-line using System.Diagnostics.Process — Cody Gray
– Cody Gray ♦, Commented Jan 23, 2012 at 22:51

L.B · Accepted Answer · 2012-01-23 21:14:17Z

2

The only parameter you need is -display Others are not parameters to the program and should be handled by you by using RedirectStandardInput and RedirectStandardOutput

E.g

read the file D:\tmp\SrcPgm\image000.pbm
write to StandardInput of your process
read from StandardOutput of your process
write to result.pbm

Using command redirection operators

edited Jan 23, 2012 at 21:14

answered Jan 23, 2012 at 20:58

L.B

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2 Comments

0xBADF00D Over a year ago

Ok I tried this, but now I got an onther error: Error: Input is not a standard raw PGM file. But everthing I do is process.StandardInput.Write(File.ReadAllBytes(sourceFile)) and Flush()+Close(). I does not change anything on the content on the file.

0xBADF00D Over a year ago

If solved the problem with this link. The problem was solved by reading the file into a string, instead of a byte[]. Does anybody know why? Thanks to L.B.

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