c# 操作DOS ping命令判断与指定主机是否可以通信

using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Timers;
using System.Xml;
using System.Xml.Linq;
using My.Common;
using System.Net.Sockets;
using System.Diagnostics;

namespace mytest
{

public class Program
{
const int SOCKET_ERROR = -1;
const int ICMP_ECHO = 8;

static void Main(string[] args)
{

string ip = "115.239.210.26";//百度IP地址
string strRst = CmdPing(ip);
Console.WriteLine(strRst);

Console.WriteLine("OK");
Console.Read();
}

private static string CmdPing(string strIp)
{
Process p = new Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
string pingrst;
p.Start();
p.StandardInput.WriteLine("ping -n 1 " + strIp);
p.StandardInput.WriteLine("exit");
string strRst = p.StandardOutput.ReadToEnd();
if (strRst.IndexOf("(0% loss)") != -1) pingrst = "连接";
else if (strRst.IndexOf("Destination host unreachable.") != -1)
pingrst = "无法到达目的主机";
else if (strRst.IndexOf("Request timed out.") != -1)
pingrst = "超时";
else if (strRst.IndexOf("Unknown host") != -1)
pingrst = "无法解析主机";
else
pingrst = strRst;
p.Close();
return pingrst;
}

}
}