Using shell commands in C#

Question

I've the below code where I use DevCon.exe to capture something and write it in a file. I parse this file for a need.

Process p = new Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.Arguments = "/C devcon.exe find = port *monitor* > monitor_Details.txt";
p.StartInfo.CreateNoWindow = true;
p.StartInfo.UseShellExecute = true;
p.StartInfo.Verb = "runas";
p.Start();

Unfortunately, with this code, I dont see any textfile created. So, here shell commands are not considered though I mentioned. Same command is working in CMDLine.

Can anyone pls help as to what's going wrong?

I tried with below code as well and it does not work.

Process p = new Process();
p.StartInfo.FileName = "devcon.exe";
p.StartInfo.Arguments = "find = port *monitor* > monitor_Details.txt";
p.StartInfo.CreateNoWindow = true;
p.StartInfo.UseShellExecute = true;
p.StartInfo.Verb = "runas";
p.Start();

Are you setting the current directory? If not your relative locations may not be where you think they are. — Servy
– Servy, Commented Sep 17, 2012 at 13:44
Locations/working directory are fine here. they're do not seem to be a problem — stack_pointer is EXTINCT
– stack_pointer is EXTINCT, Commented Sep 17, 2012 at 16:08

Aghilas Yakoub · Accepted Answer · 2012-09-17 13:22:25Z

3

You can add theses lines - based on RedirectStandardOutput

p.StartInfo.RedirectStandardOutput = true;
.....
p.Start();
string result = p.StandardOutput.ReadToEnd();

Link : http://msdn.microsoft.com/fr-fr/library/system.diagnostics.processstartinfo.redirectstandardoutput.aspx

answered Sep 17, 2012 at 13:22

Aghilas Yakoub

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4 Comments

Nasreddine Over a year ago

You should add UseShellExecute = false there.

stack_pointer is EXTINCT Over a year ago

thanks. but strangely, I observe no content of the file "monitor_Details.txt" meaning the file is empty though it's created. Is there anything wrong with ">" write operation?

Aghilas Yakoub Over a year ago

I'am happy to help you stack_pointer is EXTINCT, maybe your arguments, it's possible

stack_pointer is EXTINCT Over a year ago

the arguments seem to be correct Aghilas, because they work as such in CmdPrompt. Just that they do not work in C# here :(

mymo · Accepted Answer · 2013-05-26 04:02:59Z

0

I had the exact same problem. A workaround is to provide the UserName and Password parameters for the process as well as the "runas" verb. This will make the new process start elevated and be able to Read/Write files. I don't have clear explanation but it worked for me.

p.StartInfo.Verb = "runas";
p.StartInfo.UserName = Environment.UserName;
p.StartInfo.Password = PromptUserPassword(); //Get password as SecureString

answered May 26, 2013 at 4:02

mymo

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