ping域C#

尝试ping一个域，看看我是否得到了一个响应代码，以获得一个指示，如果它已注册。从以下代码中获得持续的积极结果-有什么想法吗

public static string Check(string keyword)
    {
        Ping pingSender = new Ping();
        PingOptions options = new PingOptions();

        // Use the default Ttl value which is 128,
        // but change the fragmentation behavior.
        options.DontFragment = true;

        // Create a buffer of 32 bytes of data to be transmitted.
        string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        byte[] buffer = Encoding.ASCII.GetBytes(data);
        int timeout = 120;
        PingReply reply = pingSender.Send(keyword, timeout, buffer, options);
        if (reply.Status == IPStatus.Success)
        {

            return "found";
        }
        else
        {
            return "not found";
        }
    }


    private void hunt_Click(object sender, EventArgs e)
    {
        string keyword = txtKeyword.Text;
        txtOutput.Text = Check(keyword);
    }

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非常感谢您的帮助：-）

嘿，我运行了这段代码，它可以正常工作（输入worng IP或DNS时会引发异常），为什么不使用此重载

       public static string Check(string keyword)
         {
        Ping pingSender = new Ping();
        //PingOptions options = new PingOptions();

        // Use the default Ttl value which is 128, 
        // but change the fragmentation behavior. 
       // options.DontFragment = true;

        // Create a buffer of 32 bytes of data to be transmitted. 
        //string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        // byte[] buffer = Encoding.ASCII.GetBytes(data);
        // int timeout = 120;
        try
        {
            PingReply reply = pingSender.Send(keyword);
            return "found";
        }
        catch
        {
            return "not found";
        }


    }

---

嘿，我运行了这段代码，它运行正常，（当输入worng IP或DNS时抛出异常）为什么不使用这个重载

       public static string Check(string keyword)
         {
        Ping pingSender = new Ping();
        //PingOptions options = new PingOptions();

        // Use the default Ttl value which is 128, 
        // but change the fragmentation behavior. 
       // options.DontFragment = true;

        // Create a buffer of 32 bytes of data to be transmitted. 
        //string data = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
        // byte[] buffer = Encoding.ASCII.GetBytes(data);
        // int timeout = 120;
        try
        {
            PingReply reply = pingSender.Send(keyword);
            return "found";
        }
        catch
        {
            return "not found";
        }


    }

---

你能写下你试图执行它的关键字吗？可能与我尝试在域“www.goosdfdsgle.com”中运行上述代码的情况相同，并引发套接字异常“这通常是主机名解析期间的临时错误，意味着本地服务器没有收到权威服务器的响应”。似乎是正确的行为。你能写下你试图执行它的关键字吗？可能是重复的，我尝试在域“www.goosdfdsgle.com”中运行上述代码，并引发套接字异常“这通常是主机名解析过程中的临时错误，意味着本地服务器没有收到来自权威服务器的响应”。这似乎是正确的行为。