C# 搜索海康威视网络摄像头

private (string, string, int) InquiryHikvisionWebCamera()
{
    string deviceType = string.Empty;
    string name = string.Empty;
    string ip = string.Empty;
    int port = 0;
    string mac = string.Empty;

    string msg = string.Empty;

    IPEndPoint ipend = new IPEndPoint(IPAddress.Any, 0);
    using (UdpClient client = new UdpClient(ipend))
    {
        client.Client.ReceiveTimeout = 1000;
        client.EnableBroadcast = false;
        client.JoinMulticastGroup(IPAddress.Parse("239.255.255.250"));
        IPEndPoint multicast = new IPEndPoint(IPAddress.Parse("239.255.255.250"), 37020);

        var uuid = Guid.NewGuid().ToString().ToUpper();
        msg = $"{uuid}inquiry";

        byte[] buf = Encoding.Default.GetBytes(msg);
        Console.WriteLine("Send Message :" + msg);
        client.Send(buf, buf.Length, multicast);

        while (true)
        {
            try
            {
                buf = client.Receive(ref multicast);
                msg = Encoding.Default.GetString(buf);

                XmlDocument doc = new XmlDocument();
                doc.LoadXml(msg);

                XmlNodeList nodes = doc.DocumentElement.ChildNodes;
                foreach (XmlNode node in nodes)
                {
                    Console.WriteLine(node.Name + ": " + node.InnerText);
                    switch (node.Name)
                    {
                        case "DeviceType":
                            deviceType = node.InnerText;
                            break;
                        case "DeviceDescription":
                            name = node.InnerText;
                            break;
                        case "DeviceSN":
                            break;
                        case "IPv4Address":
                            ip = node.InnerText;
                            break;
                        case "CommandPort":
                            port = Convert.ToInt32(node.InnerText);
                            break;
                        case "MAC":
                            mac = node.InnerText;
                            break;
                        case "Encrypt":
                            break;
                        default:
                            break;
                    }
                }
            }
            catch(System.Net.Sockets.SocketException ex)
            {
                Console.WriteLine(ex.Message);
                if (ex.SocketErrorCode == SocketError.TimedOut)
                {
                    break;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally
            {
                buf = null;
            }
        }

        client.Close();
    }

    
    if (deviceType.Equals("10110"))
    {
        return (name, ip, port);
    }
    else
    {
        return (string.Empty, string.Empty, 0);
    }
}

private void button1_Click(object sender, EventArgs e)
{
    (string name, string ip, int port) retVal = InquiryHikvisionWebCamera();
    if (!retVal.name.Equals(string.Empty))
    {
        this.textBox1.Text = retVal.name;
        this.textBox2.Text = retVal.ip;
        this.textBox3.Text = retVal.port.ToString();
    }
}

源代码

https://download.csdn.net/download/syukugai/88299251