C#串口接收程序的实现
1.代码
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.IO.Ports; namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); CheckForIllegalCrossThreadCalls = false; serialPort1.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); serialPort1.Encoding = Encoding.GetEncoding("GB2312"); System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false; } /// /数据接收部分 private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)//接收函数 { try { string recive_data; recive_data = serialPort1.ReadExisting(); recive_data = returnData.ToString(); textBox1.Text += recive_data; textBox1.AppendText("\r\n"); } catch { } } /// //搜索串口部分 private void button1_Click(object sender, EventArgs e) { SearchAnAddSerialToComboBox(serialPort1, comboBox1); } private void SearchAnAddSerialToComboBox(SerialPort MyPort, ComboBox MyBox)//搜索串口函数 { //将可用的串口号添加到ComboBox string[] NmberOfport = new string[20];//最多容纳20个,太多会卡,影响效率 string MidString1;//中间数组,用于缓存 MyBox.Items.Clear();//清空combobox的内容 for (int i = 1; i < 20; i++) { try //核心是靠try和catch 完成遍历 { MidString1 = "COM" + i.ToString(); //把串口名字赋给MidString1 MyPort.PortName = MidString1; //把MidString1赋给 MyPort.PortName MyPort.Open(); //如果失败,后面代码不执行?? NmberOfport[i - 1] = MidString1; //依次把MidString1的字符赋给NmberOfport MyBox.Items.Add(MidString1); //打开成功,添加到下列列表 MyPort.Close(); //关闭 MyBox.Text = NmberOfport[i - 1]; //显示最后扫描成功那个串口 } catch { }; } } /// 打开串口部分 private void button2_Click(object sender, EventArgs e) { if (button2.Text == "打开串口")//为0时,表示关闭,此时可以进行打开操作 { try { serialPort1.PortName = comboBox1.Text;//获取端口号 serialPort1.BaudRate = Convert.ToInt32(comboBox2.Text);//设置波特率 //serialPort1.Parity = Parity.None; //serialPort1.DataBits = 8; //serialPort1.StopBits = StopBits.One; serialPort1.Open();//打开串口 button2.Text = " 关闭串口"; } catch { MessageBox.Show("串口打开错误"); } } else //为1时,表示开启,此时可以进行关闭操作 { try { serialPort1.Close();//关闭串口 button2.Text = "打开串口";//置位为0,表示状态为关闭 } catch { } } } /// <summary> /// /清空显示部分 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button3_Click(object sender, EventArgs e) { textBox1.Clear(); } } }
2.工具
串口虚拟软件
串口软件,发送数据
3.效果
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