Issue executing a command with cmd.exe

问题

I've got an issue executing this code:

Process arp = new Process();
arp.StartInfo.UseShellExecute = false;
arp.StartInfo.RedirectStandardOutput = true;
arp.StartInfo.FileName = "C://Windows//System32//cmd.exe";
arp.StartInfo.Arguments = "arp -a";
arp.StartInfo.RedirectStandardOutput = true;
arp.Start();
arp.WaitForExit();
string output = arp.StandardOutput.ReadToEnd();
MessageBox.Show(output);

The program should put the output of arp-a into the String output but it gives me back this instead:

Microsoft Windows [Version 6.1.7601]\r\nCopyright (c) 2009 Microsoft Corporation. All rights reserved.\r\n\r\nC:\Users\user01\documents\visual studio 2012\Projects\freehotspotexploiter\freehotspotexploiter\bin\Debug>

Someone knows how to fix it?

回答1:

In order to send a command to cmd.exe as an argument, use the "/c" flag.

arp.StartInfo.Arguments = "/c arp -a";

回答2:

Your command name should be arp not cmd.exe

Replace This:

arp.StartInfo.FileName = "C://Windows//System32//cmd.exe";
arp.StartInfo.Arguments = "arp -a";

With This:

arp.StartInfo.FileName = "arp";
arp.StartInfo.Arguments = "-a";

来源：https://stackoverflow.com/questions/22306258/issue-executing-a-command-with-cmd-exe