Xcom

窗体：

(groupBox组合框，comboBox下拉框)

xcom代码：

namespace _01_作业
{
    // 1kb 1024B 1200B
    // 1MB 

    public partial class Form1 : Form
    {
        public List<string> botelv = new List<string> {   "600","1200", "2400", "4800", "9600","14400", "19200", "28800","38400", "43000", "57600",
  "76800","115200","128000","230400","256000","460800","921600","1382400", "自定义" };
        public List<string> tizhiwei = new List<string>() { "1", "1.5", "2" };
        public List<string> shujuwei = new List<string>() { "5", "6", "7", "8" };
        public List<string> xiaojianwei = new List<string>() { "None", "Odd", "Even"};
        public List<string> xiaoshi = new List<string>() { "16禁止(HEX)", "字符显示(ASCII)" };
        SerialPort port;

        public Form1()
        {
            InitializeComponent();
            initPort();// 初始化串口的方法
            comboBox2.DataSource = botelv;          // 初始化波特率 所有波特率显示下拉框里面          
            comboBox3.DataSource = tizhiwei;
            comboBox4.DataSource = shujuwei;
            comboBox5.DataSource = xiaojianwei;
            comboBox6.DataSource = xiaoshi;
            comboBox2.Text = "9600";
            comboBox4.Text = "8";
            port = new SerialPort();
            port.DataReceived += Port_DataReceived;
            port.DtrEnable = true;
            port.RtsEnable = true;
        }

        private void Port_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            byte[] bs = new byte[port.BytesToRead];// 读取缓存区长度
            port.Read(bs, 0, bs.Length);

            string value = null;
            this.Invoke((EventHandler)delegate
            {
                if (comboBox6.Text == "16进制(HEX)")
                {
                    // 16进制显示
                    foreach (var item in bs)
                    {
                        value += "" + item.ToString("X");
                    }
                
                }
                else
                {
                    value = Encoding.GetEncoding("gb2312").GetString(bs);
                }
                richTextBox1.Text = value + "\t\n";
                richTextBox1.SelectionStart = richTextBox1.Text.Length;
                richTextBox1.ScrollToCaret();
                port.DiscardInBuffer();// 清空缓存区
            });
        }

        void initPort()
        {
            comboBox1.DataSource = null;// 给下拉框添加数据源
            // 获取电脑下所有的串行端口 GetPortNames()
            string[] names = SerialPort.GetPortNames();
            if (names.Length != 0)
            {
                comboBox1.DataSource = names;
            }
            else
            {
                MessageBox.Show("未扫描到串口");
            }
             
        }

        // 检测当前电脑串口行端口
        private void button1_Click(object sender, EventArgs e)
        {
            initPort();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (port.IsOpen == true)
            {
                port.Close();
                button2.Text = "打开串口";
                comboBox1.Enabled = comboBox2.Enabled = comboBox3.Enabled = comboBox4.Enabled = comboBox5.Enabled = comboBox6.Enabled = true;
            }
            else
            {
                port.Open();// 打开串口
                comboBox1.Enabled = comboBox2.Enabled = comboBox3.Enabled = comboBox4.Enabled = comboBox5.Enabled = comboBox6.Enabled = false;
                button2.Text = "关闭串口";
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            byte[] bs = Encoding.UTF8.GetBytes(this.richTextBox2.Text);
            port.Write(bs, 0, bs.Length);
        }
    }
}

跳转连接

创建两个窗体

From1 一个button按钮

namespace _02_作业
{
    public partial class Form1 : Form
    {
        UdpClient udp;
        public List<string> ip = new List<string> {"224.0.0.188","224.0.1.188"}; 
        public Form1()
        {
            InitializeComponent();
        }
        // 跳转
        private void button2_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2(udp,ip);
            f2.ShowDialog();
        }
    }
}

From2

namespace _02_作业
{
    public partial class Form2 : Form
    {
        UdpClient udpclient;
        List<string> list;
        public Form2(UdpClient udp,List<string> ip)
        {
            InitializeComponent();
            udpclient = udp;
            list = ip;
            TianJia();
        }
        public void TianJia() 
        {
            this.listBox1.Items.Clear();
            this.listBox1.Items.AddRange(list.ToArray());
            this.Refresh();
        }
        // 添加组播
        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "")
            {
                MessageBox.Show("数据为空！");
            }
            else
            {
                if (list.Contains(textBox1.Text))
                {
                    MessageBox.Show("数据重复");
                }
                else
                {
                    list.Add(textBox1.Text);
                    TianJia();
                }
                
            }
        }
        // 删除组播
        private void button2_Click(object sender, EventArgs e)
        {
            if (list.Contains(textBox1.Text))
            {
                list.RemoveAt(list.IndexOf(textBox1.Text));
                TianJia();
            }
            else
            {
                MessageBox.Show("数据不存在");
            }
        }
        // 打开
        private void button3_Click(object sender, EventArgs e)
        {
            udpclient = new UdpClient(new IPEndPoint(IPAddress.Any, 8080));
            strartReceive();
           
        }

        private void button4_Click(object sender, EventArgs e)
        {
            byte[] bs = Encoding.UTF8.GetBytes(this.textBox2.Text);
            udpclient.Send(bs, bs.Length, this.textBox1.Text, 8080);
        }

        private void button5_Click(object sender, EventArgs e)
        {
            udpclient.JoinMulticastGroup(IPAddress.Parse(this.textBox1.Text));
        }
        async void strartReceive()
        {
            while (true)
            {
               
                UdpReceiveResult body = await udpclient.ReceiveAsync();
                BeginInvoke((Action)(() =>
                {
                    richTextBox1.AppendText(body.RemoteEndPoint.ToString() + ":" + Encoding.UTF8.GetString(body.Buffer) + "\t\n");
                    richTextBox1.ScrollToCaret();
                }));
            }

        }
    }
}