1、C#使用SerialPort控件用類及線程實現串口通信C# 使用SerialPort 源碼實例編輯源碼復制到剪貼板打印using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO.Ports; using System.Threading; namespace TestSerialPort publ

2、ic partial class frmTESTSerialPort : Form public frmTESTSerialPort() InitializeComponent(); Control.CheckForIllegalCrossThreadCalls = false; private Button button1; private TextBox txtSend; private TextBox txtReceive; private Label label1; private Label label2; / / 必需的設計器變量。 / private System.Compone

3、ntModel.IContainer components = null; / / 清理所有正在使用的資源。 / / 如果應釋放托管資源，為 true；否則為 false。 protected override void Dispose(bool disposing) if (disposing & (components != null) components.Dispose(); base.Dispose(disposing); #region Windows 窗體設計器生成的代碼 / / 設計器支持所需的方法 - 不要 / 使用代碼編輯器修改此方法的內容。 / private void

4、InitializeComponent() this.button1 = new System.Windows.Forms.Button(); this.txtSend = new System.Windows.Forms.TextBox(); this.txtReceive = new System.Windows.Forms.TextBox(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.SuspendLayout(); / / b

5、utton1 / this.button1.Location = new System.Drawing.Point(440, 379); this.button1.Name = button1; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 0; this.button1.Text = 發送; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.bu

6、tton1_Click); / / txtSend / this.txtSend.Location = new System.Drawing.Point(59, 12); this.txtSend.Multiline = true; this.txtSend.Name = txtSend; this.txtSend.Size = new System.Drawing.Size(456, 164); this.txtSend.TabIndex = 2; / / txtReceive / this.txtReceive.Location = new System.Drawing.Point(59,

7、 200); this.txtReceive.Multiline = true; this.txtReceive.Name = txtReceive; this.txtReceive.Size = new System.Drawing.Size(456, 164); this.txtReceive.TabIndex = 2; / / label1 / this.label1.Location = new System.Drawing.Point(13, 15); this.label1.Name = label1; this.label1.Size = new System.Drawing.S

8、ize(41, 12); this.label1.TabIndex = 0; this.label1.Text = 發送; / / label2 / this.label2.Location = new System.Drawing.Point(13, 213); this.label2.Name = label2; this.label2.Size = new System.Drawing.Size(41, 12); this.label2.TabIndex = 0; this.label2.Text = 接收; / / frmTESTSerialPort / this.AutoScaleD

9、imensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(546, 434); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.txtReceive); this.Controls.Add(this.txtSend); this.

10、Controls.Add(this.button1); this.Name = frmTESTSerialPort; this.Text = 串口試驗; this.ResumeLayout(false); this.PerformLayout(); #endregion private void button1_Click(object sender, EventArgs e) /實例化串口對象(默認：COMM1,9600,e,8,1) SerialPort serialPort1 = new SerialPort(); /更改參數 serialPort1.PortName = COM1; s

11、erialPort1.BaudRate = 19200; serialPort1.Parity = Parity.Odd; serialPort1.StopBits = StopBits.Two; /上述步驟可以用在實例化時調用SerialPort類的重載構造函數 /SerialPort serialPort = new SerialPort(COM1, 19200, Parity.Odd, StopBits.Two); /打開串口(打開串口后不能修改端口名,波特率等參數,修改參數要在串口關閉后修改) serialPort1.Open(); /發送數據 SendStringData(seria

12、lPort1); /也可用字節的形式發送數據 /SendBytesData(serialPort1); /開啟接收數據線程 ReceiveData(serialPort1); /發送字符串數據 private void SendStringData(SerialPort serialPort) serialPort.Write(txtSend.Text); / / 開啟接收數據線程 / private void ReceiveData(SerialPort serialPort) /同步阻塞接收數據線程 Thread threadReceive=new Thread(new Parameter

13、izedThreadStart(SynReceiveData); threadReceive.Start(serialPort); /也可用異步接收數據線程 /Thread threadReceiveSub = new Thread(new ParameterizedThreadStart(AsyReceiveData); /threadReceiveSub.Start(serialPort); /發送二進制數據 private void SendBytesData(SerialPort serialPort) byte bytesSend=System.Text.Encoding.Defau

14、lt.GetBytes(txtSend.Text ); serialPort.Write(bytesSend, 0, bytesSend.Length); /同步阻塞讀取 private void SynReceiveData(object serialPortobj) SerialPort serialPort = (SerialPort)serialPortobj; System.Threading.Thread.Sleep(0); serialPort.ReadTimeout = 1000; try /阻塞到讀取數據或超時(這里為2秒) byte firstByte=Convert.To

15、Byte(serialPort.ReadByte(); int bytesRead=serialPort.BytesToRead ; byte bytesData=new bytebytesRead+1; bytesData0 = firstByte; for (int i = 1; i =bytesRead; i+) bytesData = Convert.ToByte( serialPort.ReadByte(); txtReceive.Text = System.Text.Encoding.Default.GetString(bytesData); catch(Exception e) MessageBox.Show(e.Message); /處理超時錯誤 serialPort.Close(); /異步讀取 private void AsyReceiveData(object serialPortobj) SerialPort serialPort = (SerialPort)serialPortobj; System.Threading.Thread.Sleep(500); try txtReceive.Text = serialPort.ReadExisting(); catch (Exception e)