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c#下实现ping操作

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.
    在button1_click事件键入
    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());
    }
    }

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