与串口发送数据和接收数据，在此作一个简单的Demo.此Demo可以实现按下硬件按钮，灯亮，发送灯状态数据过来。并且可以实现几个灯同时亮，发送灯的状态数据过来。PC端实现点击按钮让硬件灯亮。
此处为4个灯，发送过来的数据：0代表暗，1代表亮。列如：1010代表1号灯和3号灯亮，2号和4号灯暗。 发送过去的数据：0代表1号灯亮，1代表1号灯灭、2代表2号灯亮，3代表2号灯灭、4代表3号灯亮，5代表3号灯灭、6代表4号灯亮，7代表4号灯灭。 布局代码：后台代码：
先private SerialPort Sp = new SerialPort(); public delegate void HandleInterfaceUpdataDelegate(string text); private HandleInterfaceUpdataDelegate interfaceUpdataHandle; String[] arr = { "0", "0", "0", "0" };//用于存储硬件上面灯状态 其次在Loaded事件添加用于更改串口参数：
//更改参数 Sp.PortName = "COM3"; Sp.BaudRate = 115200; Sp.Parity = Parity.None; Sp.StopBits = StopBits.One;
编写监听和发送数据事件：private void Serial() { Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived); if (!Sp.IsOpen) { Sp.Open(); } //用字节的形式发送数据 SendBytesData(Sp); } //发送二进制数据 private void SendBytesData(SerialPort Sp) { byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text); Sp.Write(bytesSend, 0, bytesSend.Length); } public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { /* byte[] readBuffer = new byte[Sp.ReadBufferSize]; Sp.Read(readBuffer, 0, readBuffer.Length); //Dispatcher.Invoke(interfaceUpdataHandle, new string[]{ Encoding.UTF8.GetString(readBuffer)}); Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(readBuffer) }); //Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });*/ SerialPort serialPort = (SerialPort)(sender); System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱 int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致 byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据 //received_count += n;//增加接收计数 serialPort.Read(buf, 0, n);//读取缓冲数据 //因为要访问ui资源，所以需要使用invoke方式同步ui interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象 // Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) }); Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(buf) }); //serialPort.Close(); } private void UpdateTextBox(string text) { txtReceive.Text = text; String Receive = Convert.ToString(text); if (Receive != "") { // MessageBox.Show("receive", Receive); String Receive1 = Receive.Substring(0, 1); String Receive2 = Receive.Substring(1, 1); String Receive3 = Receive.Substring(2, 1); String Receive4 = Receive.Substring(3, 1); if (Receive1 == 1.ToString()) { one.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[0] = 1.ToString(); } else { one.Background = new SolidColorBrush(Colors.Red); arr[0] = 0.ToString(); } if (Receive2 == 1.ToString()) { two.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[1] = 1.ToString(); } else { two.Background = new SolidColorBrush(Colors.Red); arr[1] = 0.ToString(); } if (Receive3 == 1.ToString()) { three.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[2] = 1.ToString(); } else { three.Background = new SolidColorBrush(Colors.Red); arr[2] = 0.ToString(); } if (Receive4 == 1.ToString()) { four.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[3] = 1.ToString(); } else { four.Background = new SolidColorBrush(Colors.Red); arr[3] = 0.ToString(); } //String abc = Convert.ToString(arr); //MessageBox.Show("abc", abc); // MessageBox.Show("arr", arr); } } 最后button点击事件添加：
private void btnSend_Click(object sender, RoutedEventArgs e) { if (arr[0] == 0.ToString()) { txtSend.Text = "0"; Serial(); } else { txtSend.Text = "1"; Serial(); } } private void btnSend1_Click(object sender, RoutedEventArgs e) { if (arr[1] == 0.ToString()) { txtSend.Text = "2"; Serial(); } else { txtSend.Text = "3"; Serial(); } } private void btnSend2_Click(object sender, RoutedEventArgs e) { if (arr[2] == 0.ToString()) { txtSend.Text = "4"; Serial(); } else { txtSend.Text = "5"; Serial(); } } private void btnSend3_Click(object sender, RoutedEventArgs e) { if (arr[3] == 0.ToString()) { txtSend.Text = "6"; Serial(); } else { txtSend.Text = "7"; Serial(); } } 要想在程序开始时就可以监听数据，在其Loaded里面添加上： Serial();
完整后台代码：public partial class MainWindow : Window { private SerialPort Sp = new SerialPort(); public delegate void HandleInterfaceUpdataDelegate(string text); private HandleInterfaceUpdataDelegate interfaceUpdataHandle; String[] arr = { "0", "0", "0", "0" };//用于存储硬件上面灯状态 public MainWindow() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { //更改参数 Sp.PortName = "COM3"; Sp.BaudRate = 115200; Sp.Parity = Parity.None; Sp.StopBits = StopBits.One; Serial(); } private void btnSend_Click(object sender, RoutedEventArgs e) { if (arr[0] == 0.ToString()) { txtSend.Text = "0"; Serial(); } else { txtSend.Text = "1"; Serial(); } } private void btnSend1_Click(object sender, RoutedEventArgs e) { if (arr[1] == 0.ToString()) { txtSend.Text = "2"; Serial(); } else { txtSend.Text = "3"; Serial(); } } private void btnSend2_Click(object sender, RoutedEventArgs e) { if (arr[2] == 0.ToString()) { txtSend.Text = "4"; Serial(); } else { txtSend.Text = "5"; Serial(); } } private void btnSend3_Click(object sender, RoutedEventArgs e) { if (arr[3] == 0.ToString()) { txtSend.Text = "6"; Serial(); } else { txtSend.Text = "7"; Serial(); } } private void Serial() { Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived); if (!Sp.IsOpen) { Sp.Open(); } //用字节的形式发送数据 SendBytesData(Sp); } //发送二进制数据 private void SendBytesData(SerialPort Sp) { byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text); Sp.Write(bytesSend, 0, bytesSend.Length); } public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { /* byte[] readBuffer = new byte[Sp.ReadBufferSize]; Sp.Read(readBuffer, 0, readBuffer.Length); //Dispatcher.Invoke(interfaceUpdataHandle, new string[]{ Encoding.UTF8.GetString(readBuffer)}); Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(readBuffer) }); //Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });*/ SerialPort serialPort = (SerialPort)(sender); System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱 int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致 byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据 //received_count += n;//增加接收计数 serialPort.Read(buf, 0, n);//读取缓冲数据 //因为要访问ui资源，所以需要使用invoke方式同步ui interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象 // Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) }); Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(buf) }); //serialPort.Close(); } private void UpdateTextBox(string text) { txtReceive.Text = text; String Receive = Convert.ToString(text); if (Receive != "") { // MessageBox.Show("receive", Receive); String Receive1 = Receive.Substring(0, 1); String Receive2 = Receive.Substring(1, 1); String Receive3 = Receive.Substring(2, 1); String Receive4 = Receive.Substring(3, 1); if (Receive1 == 1.ToString()) { one.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[0] = 1.ToString(); } else { one.Background = new SolidColorBrush(Colors.Red); arr[0] = 0.ToString(); } if (Receive2 == 1.ToString()) { two.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[1] = 1.ToString(); } else { two.Background = new SolidColorBrush(Colors.Red); arr[1] = 0.ToString(); } if (Receive3 == 1.ToString()) { three.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[2] = 1.ToString(); } else { three.Background = new SolidColorBrush(Colors.Red); arr[2] = 0.ToString(); } if (Receive4 == 1.ToString()) { four.Background = new SolidColorBrush(Colors.MediumAquamarine); arr[3] = 1.ToString(); } else { four.Background = new SolidColorBrush(Colors.Red); arr[3] = 0.ToString(); } //String abc = Convert.ToString(arr); //MessageBox.Show("abc", abc); // MessageBox.Show("arr", arr); } } } 这样可以实现btn和硬件本身按钮同时控制灯亮灯灭。
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