C# Ping类的使用

花了一天，随便写的个小程序，源码公开，有需要的可以拿去。我写这个程序的本意是可以ping有固定IP的圈存机，如何网络不通会自己返回其相应的位置。
程序说明，程序可以自动ping预先写入的一组IP地址，也可以手动ping输入的ip.
代码如下：
  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using System.Net.Sockets;
 10 using System.Net;
 11 using System.Net.NetworkInformation;
 12 
 13 namespace Ping_test
 14 {
 15     public partial class ManiForm : Form
 16     {
 17         public ManiForm()
 18         {
 19             InitializeComponent();
 20 
 21         }
 22         //表示可变字符串
 23      
 24      //   IcmpPacket packet = new IcmpPacket(0, 0, 0, 45, 0, 4);
 25       //  Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp);
 26 
 27         private void button1_Click(object sender, EventArgs e)
 28         {
 29             try
 30             {
 31                 IPAddress myIP = IPAddress.Parse(textBox1.Text);
 32             }
 33             catch(Exception ex)
 34             {
 35                 MessageBox.Show("不是有效的IP");
 36                 return;
 37             }
 38             this.Text = "正在ping....";
 39          //   listBox1.Items.Clear();
 40             Ping pingSender = new Ping();
 41             PingOptions options = new PingOptions();
 42 
 43             // Use the default Ttl value which is 128,
 44             // but change the fragmentation behavior.
 45             options.DontFragment = true;
 46 
 47             // Create a buffer of 32 bytes of data to be transmitted.
 48             string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
 49             byte[] buffer = Encoding.ASCII.GetBytes(data);
 50             int timeout = 120;
 51             for (int i = 0; i < 4; i++)
 52             {
 53                 PingReply reply = pingSender.Send(textBox1.Text, timeout, buffer, options);      
 54                 displayReply(reply);
 55                 timeDelay(800);    //0.8s    
 56           
 57              }
 58             this.Text = "已完成";
 59         }
 60         private void button3_Click(object sender, EventArgs e)
 61         {
 62             this.Close();
 63             Application.Exit(); 
 64         }
 65       
 66 
 67         private void button2_Click(object sender, EventArgs e)
 68         {
 69             string[] ipaddress = new string[4];
 70             ipaddress[0] = "192.168.1.1";
 71             ipaddress[1] = "192.168.1.2";
 72             ipaddress[2] = "192.168.1.3";
 73             ipaddress[3] = "192.168.1.4";
 74             for (int i = 0; i < 4; i++)
 75             {
 76                 textBox1.Text = ipaddress[i];
 77                 button1_Click(this, e);
 78             }
 79 
 80         }
 81         private void displayReply(PingReply reply) //显示结果   
 82         {
 83             StringBuilder sbuilder;
 84             sbuilder = new StringBuilder();
 85             if (reply.Status == IPStatus.Success)
 86             {
 87                     
 88                 sbuilder.Append(string.Format("地址: {0} ", reply.Address.ToString()));
 89                 sbuilder.Append(string.Format("时间: {0} ", reply.RoundtripTime));
 90                 sbuilder.Append(string.Format("生存期: {0} ", reply.Options.Ttl));
 91              // sbuilder.Append(string.Format("Don't fragment: {0} ", reply.Options.DontFragment));
 92                 sbuilder.Append(string.Format("缓存: {0} ", reply.Buffer.Length));
 93                 listBox1.Items.Add(sbuilder.ToString());   
 94             }
 95             else
 96             {
 97                 
 98                 switch(textBox1.Text)
 99                 {
100                     case "192.168.1.1":
101                         {
102                           sbuilder.Append("地址："+textBox1.Text + "  一号圈存机不可达！");
103                           listBox1.Items.Add(sbuilder.ToString());
104                           break;
105                         }
106                     case "192.168.1.2":
107                         {
108                             sbuilder.Append("地址："+textBox1.Text + "  二号圈存机不可达！");
109                             listBox1.Items.Add(sbuilder.ToString());
110                             break;
111                         }
112                     case "192.168.1.3":
113                         {
114                             sbuilder.Append("地址："+textBox1.Text + "  三号圈存机不可达！");
115                             listBox1.Items.Add(sbuilder.ToString());
116                             break;
117                         }
118                 case "192.168.1.4":
119                     {
120                         sbuilder.Append("地址："+textBox1.Text + "  四号圈存机不可达！");
121                         listBox1.Items.Add(sbuilder.ToString());
122                         break;
123                     }
124 
125                   }   //switch
126 
127 
128             }
129             this.listBox1.SelectedIndex = this.listBox1.Items.Count - 1;
130         }
131         /// <summary>
132         /// 延时函数
133         /// </summary>
134         /// <param name="iInterval"></param>
135         private void timeDelay(int iInterval)
136         {
137             DateTime now = DateTime.Now;
138             while (now.AddMilliseconds(iInterval) > DateTime.Now)
139             { }
140             return;
141         }
142 
143         private void button4_Click(object sender, EventArgs e)
144         {
145             this.listBox1.Items.Clear();
146         }
147 
148     
149 
150     }
151 }