C#上位机显示温度检测，可以手动保存数据

可以先展示一下这个界面

可以显示从单片机传过来的数据，以温度计的形式显示，下面展示一下代上位机的代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _8个温度
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;
        }

        private string resultFile;
        //float tempreture, tempreture1;

        private void Form1_Load(object sender, EventArgs e)
        {
            string[] baud = { "9600", "38400", "57600", "115200" };//添加波特率列表

            comboBox2.Items.AddRange(baud);

            comboBox2.Text = "115200";//设置默认值

            comboBox1.Items.AddRange(System.IO.Ports.SerialPort.GetPortNames());//获取当前电脑可用串口并添加到选项列表中
            comboBox3.Text = "1";
            comboBox4.Text = "8";
            comboBox5.Text = "无";

            serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);//添加事件处理程序
            serialPort1.Encoding = Encoding.Default;//设置编码，避免中文乱码
            label25.Text = "  " + DateTime.Now.ToString();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                if (serialPort1.IsOpen)
                {
                    serialPort1.Close();//关闭串口
                    button1.Text = "打开串口";
                    button1.ForeColor = Color.Black;
                    ovalShape1.FillColor = Color.Black;

                    comboBox1.Enabled = true;
                    comboBox2.Enabled = true;
                    comboBox3.Enabled = true;
                    comboBox4.Enabled = true;
                    comboBox5.Enabled = true;
                }
                else
                {
                    //串口已经处于关闭状态，则设置好串口属性后打开
                    comboBox1.Enabled = false;
                    comboBox2.Enabled = false;
                    comboBox3.Enabled = false;
                    comboBox4.Enabled = false;
                    comboBox5.Enabled = false;

                    serialPort1.PortName = comboBox1.Text;
                    serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text);
                    serialPort1.DataBits = 8;
                    serialPort1.Parity = System.IO.Ports.Parity.None;
                    serialPort1.StopBits = System.IO.Ports.StopBits.One;
                    serialPort1.Open();

                    button1.Text = "关闭串口";
                    button1.ForeColor = Color.Red;
                    ovalShape1.FillColor = Color.Red ;
                }
            }
            catch (Exception ex)
            {
                //捕获可能发生异常并进行处理
                //捕获到异常，创建一个行的对象，之前的不可再用
                serialPort1 = new System.IO.Ports.SerialPort();
                //刷新COM口
                comboBox1.Items.Clear();
                comboBox1.Items.AddRange(System.IO.Ports.SerialPort.GetPortNames());
                //响铃并显示异常给用户
                System.Media.SystemSounds.Beep.Play();
                button1.Text = "打开串口";
                MessageBox.Show(ex.Message );
                comboBox1.Enabled = true;
                comboBox2.Enabled = true;
                comboBox3.Enabled = true;
                comboBox4.Enabled = true;
                comboBox5.Enabled = true;
            }
        }

        //接收串口数据函数      
        private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            Thread.Sleep(500);//休眠50ms
            try
            {
                //定义一个字段，来保存串口传来的信息
                string str = serialPort1 .ReadExisting ();//字符串方式读取
                int length = serialPort1.BytesToRead;//读取数据的长度
                Byte[] data = new byte[length];//定义缓冲区，因为串口时间触发时有可能不止一个字节
                serialPort1.Read(data, 0, length);//读取数据
                textBox1.AppendText(str);

               

                string data1 = str.Substring(0, 4);
                string data2 = str.Substring(6, 4);
                string data3 = str.Substring(12, 4);
                string data4 = str.Substring(18, 4);
                string data5 = str.Substring(24, 4);
                string data6 = str.Substring(30, 4);
                string data7 = str.Substring(36, 4);
                string data8 = str.Substring(42, 4);
                try
                {
                    label14.Text = data1;
                    label15.Text = data2;
                    label16.Text = data3;
                    label17.Text = data4;
                    label18.Text = data5;
                    label19.Text = data6;
                    label20.Text = data7;
                    label22.Text = data8;
                    thermometer1.Value = Convert.ToDouble(data1);
                    thermometer2.Value = Convert.ToDouble(data2);
                    thermometer3.Value = Convert.ToDouble(data3);
                    thermometer4.Value = Convert.ToDouble(data4);
                    thermometer5.Value = Convert.ToDouble(data5);
                    thermometer6.Value = Convert.ToDouble(data6);
                    thermometer7.Value = Convert.ToDouble(data7);
                    thermometer8.Value = Convert.ToDouble(data8);
                }
                catch
                {
                    MessageBox.Show("数据发送错误");
                }



                //label14.Text  = str;
                //thermometer1.Value = Convert.ToInt32  (data [0]) ;//1130直接这样用所以会超出数组界限

                //  foreach (byte Member in data)                                                   //遍历用法
                //  {
                //      string str = Convert.ToString(Member, 16).ToUpper();
                //      textBox1.AppendText("0x" + (str.Length == 1 ? "0" + str : str) + " ");     //文本框显示1
                //上一句等同于 if(str.Length==1) 
                //str = '0' + str;
                //else
                //str = str;
                //textBox1.AppendText("0x" + str);  
                //  }
            }
            catch(Exception  ex)
            {
                serialPort1.Close();
                MessageBox.Show(ex.Message );
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if(textBox1 .Text =="")
            {
                MessageBox.Show("没有数据保存！", "错误");
                return;
            }
            SaveFileDialog SaveFile = new SaveFileDialog();
            SaveFile.Filter = "All files(*.*)|*.*|txt files(*.txt)|*.txt";//文本筛选
            SaveFile.FilterIndex = 3;//文本筛选器索引，选择第一项就是1
            SaveFile.RestoreDirectory = true;

            if(SaveFile .ShowDialog ()==DialogResult.OK )
            {
                resultFile = SaveFile.FileName;
                StreamWriter sw = File.CreateText(resultFile);
                sw.Write(textBox1.Text);
                sw.Close();
            }
        }
    }
}

下位机的程序可以从我的资源页获取