c#下实现ping操作代码
这里我写的是一个窗体程序。首先添加textbox,listbox,button控件，其中textbox录入域名或IP，listbox显示结果.

　private void button1_Click(object sender, EventArgs e)  　　{  　　Ping p1 = new Ping(); //只是演示，没有做错误处理  　　PingReply reply = p1.Send(this.textBox1.Text);//阻塞方式 displayReply(reply); //显示结果 } private void displayReply(PingReply reply) //显示结果  　　{  　　StringBuilder sbuilder ;  　　if (reply.Status == IPStatus.Success)  　　{  　　sbuilder = new StringBuilder();  　　sbuilder.Append(string.Format("Address: {0} ", reply.Address.ToString ()));  　　sbuilder.Append(string.Format("RoundTrip time: {0} ", reply.RoundtripTime));  　　sbuilder.Append(string.Format("Time to live: {0} ", reply.Options.Ttl));  　　sbuilder.Append(string.Format("Don't fragment: {0} ", reply.Options.DontFragment));  　　sbuilder.Append(string.Format("Buffer size: {0} ", reply.Buffer.Length));  　　listBox1.Items.Add(sbuilder.ToString());  　　}  　　}[nextpage]  　　也可以做异步的处理，修改button1_click,并添加PingCompletedCallBack方法  　　private void button1_Click(object sender, EventArgs e)  　　{  　　Ping p1 = new Ping();  　　p1.PingCompleted += new PingCompletedEventHandler(this.PingCompletedCallBack);//设置PingCompleted事件处理程序  　　p1.SendAsync(this.textBox1.Text, null);  　　}  　　private void PingCompletedCallBack(object sender, PingCompletedEventArgs e)  　　{  　　if (e.Cancelled)  　　{  　　listBox1.Items.Add("Ping Canncel");  　　return;  　　}  　　if (e.Error != null)  　　{  　　listBox1.Items.Add(e.Error.Message);  　　return;  　　}  　　StringBuilder sbuilder;  　　PingReply reply = e.Reply;  　　if (reply.Status == IPStatus.Success)  　　{  　　sbuilder = new StringBuilder();  　　sbuilder.Append(string.Format("Address: {0} ", reply.Address.ToString()));  　　sbuilder.Append(string.Format("RoundTrip time: {0} ", reply.RoundtripTime));  　　sbuilder.Append(string.Format("Time to live: {0} ", reply.Options.Ttl));  　　sbuilder.Append(string.Format("Don't fragment: {0} ", reply.Options.DontFragment));  　　sbuilder.Append(string.Format("Buffer size: {0} ", reply.Buffer.Length));  　　listBox1.Items.Add(sbuilder.ToString());  　　}  　　}