1 ping类 //From:www.uzhanbao.com
using System; using System.Collections.Generic; using System.Text; using System.Net.NetworkInformation; using System.Threading; using System.Windows.Forms; namespace TestLoadForm { class PingIp { Thread thread; int ping_time = 2000; System.Timers.Timer timer; public string Ip; public delegate void PingHandle(string ip,bool flag); public event PingHandle pingEvent; public PingIp(string ip) { Ip = ip; thread = new Thread(new ThreadStart(RunSecondThread)); thread.Start(); } void RunSecondThread() { timer = new System.Timers.Timer(ping_time); timer.AutoReset = true; timer.Enabled = true; timer.Elapsed += new System.Timers.ElapsedEventHandler(t_Elapsed); } void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e) { if (PingStop == false) { AutoPingIP(Ip); } else { timer.Stop(); } } bool PingStop = false; void AutoPingIP(string ip) { Ping p = new Ping(); PingOptions ops = new PingOptions(); ops.DontFragment = true; string d = "test data"; byte[] buf = Encoding.ASCII.GetBytes(d); int timeout = 3000; PingReply pr = p.Send(ip, timeout, buf, ops); if(ip != "") { if (pr.Status == IPStatus.Success) { if (pingEvent != null) pingEvent(ip,true); } else { if (pingEvent != null ) { PingStop = true; pingEvent(ip,false); } } } } public void StopTh() { if (timer != null) { timer.Dispose(); } if (thread != null) { if (thread.IsAlive) thread.Abort(); } } } }
2 测试
public partial class Form1 : Form { public Form1() { InitializeComponent(); } PingIp ping; private void Form1_Load(object sender, EventArgs e) { ping = new PingIp("192.168.100.204"); ping.pingEvent += new PingIp.PingHandle(ping_pingEvent); } void ping_pingEvent(string ip, bool flag) { this.Invoke(new MethodInvoker(delegate() { textBox1.Text += "ip:"+ip+" state:"+flag+"\r\n"; } )); } } ?
