How to capture Shell command output in C#?

Question

Summary:

• query registry on remote machine
• capture output to use in application
• needs to be in csharp
• so far all methods used can only query on the local machine
• any hope is greatly appreciated

Full issue:

I need to find a way to run a commandline command in csharp and capture its output. I know how to do this in Perl, below is the code I would use in Perl.

#machine to check
my $pc = $_[0];
#create location of registry query
my $machine = "\\\\".$pc."\\HKEY_USERS";
#run registry query
my @regQuery= `REG QUERY $machine`;

Any suggestions on how to do this in csharp would be welcome. So far ive tried using the RegistryKey OurKey = Registry.Users method and it works great but i can not query the registry on a remote machine.

Please let me know if you need any more information.

SOLUTION:(Thank you to @Robaticus)

private void reg(string host)
        {

            string build = "QUERY \\\\" + host + "\\HKEY_USERS";
            string parms = @build;
            string output = "";
            string error = string.Empty;

            ProcessStartInfo psi = new ProcessStartInfo("reg.exe", parms);

            psi.RedirectStandardOutput = true;
            psi.RedirectStandardError = true;
            psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
            psi.UseShellExecute = false;
            System.Diagnostics.Process reg;
            reg = System.Diagnostics.Process.Start(psi);
            using (System.IO.StreamReader myOutput = reg.StandardOutput)
            {
                output = myOutput.ReadToEnd();
            }
            using (System.IO.StreamReader myError = reg.StandardError)
            {
                error = myError.ReadToEnd();

            }
            Output.AppendText(output + "\n");


        }  

Answer 1

You might have to tweak this a bit, but here's some (slightly modified from the original) code that redirects stdout and stderr for a process:

        string parms = @"QUERY \\machine\HKEY_USERS";
        string output = "";
        string error = string.Empty;

        ProcessStartInfo psi = new ProcessStartInfo("reg.exe", parms);

        psi.RedirectStandardOutput = true;
        psi.RedirectStandardError = true;
        psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Normal;
        psi.UseShellExecute = false;
        System.Diagnostics.Process reg;
        reg = System.Diagnostics.Process.Start(psi);
        using (System.IO.StreamReader myOutput = reg.StandardOutput)
        {
            output = myOutput.ReadToEnd();
        }
        using(System.IO.StreamReader myError = reg.StandardError)
        {
            error = myError.ReadToEnd();

        }