C#--WPF--简单串口软件

朱雀 2023-02-27 13:36 129阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI4ODc3MTI1_size_16_color_FFFFFF_t_70]  
后台代码：

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Data;
    using System.Windows.Documents;
    using System.Windows.Input;
    using System.Windows.Media;
    using System.Windows.Media.Imaging;
    using System.Windows.Navigation;
    using System.Windows.Shapes;
    using System.IO.Ports;
    using System.Windows.Threading;
    
    namespace FirstTest
    { 
        /// <summary>
        /// MainWindow.xaml 的交互逻辑
        /// </summary>
        public partial class MainWindow : Window
        { 
            public SerialPort _serialPort = new SerialPort();
            public DispatcherTimer _timer = new DispatcherTimer();
    
            public MainWindow()
            { 
                InitializeComponent();
    
                // 配置定时器
                _timer.Interval = TimeSpan.FromMilliseconds(500);
                _timer.Tick += timerTick;
                _timer.Start();
    
                // 初始化串口
                initSerial();
            }
    
            private void initSerial()
            { 
                portCbm.Items.Clear();
    
                string[] ports = SerialPort.GetPortNames();//获取当前计算机的串行端口名的数组。
    
                for (int index = 0; index < ports.Length; index++)
                { 
                    portCbm.Items.Add(ports[index]);//添加item
                    portCbm.SelectedIndex = index; //设置显示的item索引
                }
    
                baudCbm.SelectedIndex = 1 ;
            }
    
            public void DataReceivedHandler(object sender, SerialDataReceivedEventArgs e)//读取下位机的数据，显示在textBlock中
            { 
                int len = this._serialPort.BytesToRead;
                byte[] buffer = new byte[len];
    
                this._serialPort.Read(buffer, 0, len);
    
                //string strData = BitConverter.ToString(buffer, 0, len); // 16进制
                string strData = Encoding.Default.GetString(buffer); // 字符串
    
                Dispatcher.Invoke(() =>
                { 
                    //this.recvTextBox.Text += strData;
                    //this.recvTextBox.Text += "-";//字符分隔-
    
                    this.recvTextBox.AppendText(strData);
                });
            }
    
            private void openBtnClick(object sender, RoutedEventArgs s)
            { 
                string strContent = this.openBtn.Content.ToString();
                if (strContent == "打开串口")
                { 
                    try
                    { 
                        _serialPort.PortName = portCbm.SelectedItem.ToString();//串口号
                        ComboBoxItem seletedItem = (ComboBoxItem)this.baudCbm.SelectedItem;
                        _serialPort.BaudRate = Convert.ToInt32(seletedItem.Content.ToString());//波特率
                        _serialPort.DataBits = 8;//数据位
                        _serialPort.StopBits = StopBits.One;//停止位
                        _serialPort.Parity = Parity.None;//校验位
    
                        _serialPort.Open();
                        _serialPort.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);//添加数据接收事件
                        _serialPort.DataReceived += DataReceivedHandler;
    
                        openBtn.Content = "关闭串口";
                    }
                    catch
                    { 
                        MessageBox.Show("打开串口失败", "错误");
                    }
                }
                else
                { 
                    try
                    { 
                        _serialPort.DataReceived -= DataReceivedHandler;
                        _serialPort.Close();
                        openBtn.Content = "打开串口";
                    }
                    catch
                    { 
                        MessageBox.Show("关闭串口失败", "错误");
                    }
                }
            }
    
            private void clearBtnClick(object sender, RoutedEventArgs s)
            { 
                // 清空数据
                recvTextBox.Clear();
            }
    
            private void sendBtnClick(object sender, RoutedEventArgs s)
            { 
    
            }
    
            private void timerTick(object sender, EventArgs e)
            { 
                // 定时更新串口信息
                initSerial();
            }
        }
    }

界面文件：

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI4ODc3MTI1_size_16_color_FFFFFF_t_70]: /images/20230209/35d3573955fa427fbe1b54d24a9f3c16.png