串口如何接收数据，接收到又如何处理

using System.IO;

namespace SerialPortDemo

{

public partial class Form1 : Form

{bool isStar = false;

Thread threadReceive = null;

SerialPort serialPort = null;

int i = 0; int k = 0; public Form1()

{InitializeComponent();

this.comboBox1.SelectedIndex = 0;

this.comboBox2.SelectedIndex = 2;

serialPort = new SerialPort();

if (serialPort.IsOpen) serialPort.Close();

//获得参数

serialPort.PortName = comboBox1.SelectedItem.ToString();

serialPort.BaudRate = int.Parse(comboBox2.SelectedItem.ToString());

serialPort.Open(); ThreadStart method = new ThreadStart(ReceiveData);

//在线程上执行此方法

threadReceive = new Thread(new ThreadStart(method));

}

private void button1_Click(object sender, EventArgs e)

{try{if (button1.Text == "接收数据")

{

if (!isStar)

//如果isStar等于true,则启动线程

{

threadReceive.Start(); this.toolStripStatusLabel1.Text = "正在接收数据......";

}

else{

threadReceive.Resume();

//如果isStar等于false,则解除挂起线程 this.toolStripStatusLabel1.Text = "暂停接收...";}

button1.Text = "停止接收";}

else

{

threadReceive.Suspend();

//如果是"停止接收",则挂起线程

button1.Text = "接收数据";

this.toolStripStatusLabel1.Text = "暂停接收...";

}

}

catch (Exception ex)

{MessageBox.Show(ex.Message); serialPort.Close();

}

}

//不断循环接收数据

private void ReceiveData()

{

while (true)

{Thread.Sleep(500); 

this.isStar = true;

this.SynReceiveData();

}

}

//通过串口取数据

private void SynReceiveData()

{MessageBox.Show("接收数据" + k);

k++;

string inputData = serialPort.ReadExisting();

try

{if (inputData != string.Empty) 

{if (inputData.Trim().Length == 45)

{SetText(inputData); 

}

}

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

}

//分隔字符串并保存在指定目录下

private void SetText(string str)

{

string aa = str;

StreamWriter sw = null;

if (aa != string.Empty)

{

string aaa = aa.Insert(13, ",");

aaa = aaa.Insert(32, ",");

String fileName = "C:\\GAJ_PUB\\kaoqin";

if (Directory.Exists(fileName) == false)

//如果目录不存在

{Directory.CreateDirectory(fileName);

//创建目录 sw = File.CreateText("C:\\GAJ_PUB\\kaoqin\\person" + i + ".txt");//创建文本

}

else

{

sw = File.CreateText("C:\\GAJ_PUB\\kaoqin\\person" + i + ".txt");

}

sw.WriteLine(aaa);

sw.Flush();

sw.Close();

i++;

MessageBox.Show("文件已存入指定目录下!!");

}

}

private void button2_Click(object sender, EventArgs e)

{

if (threadReceive.ThreadState==ThreadState.Running)

//当前状态为启动线程

{threadReceive.Abort();this.Close();

}

else if

(threadReceive.ThreadState == ThreadState.Suspended)

//当前状态为挂起线程

{

threadReceive.Resume();

threadReceive.Abort();

this.Close();

}

else if

(threadReceive.ThreadState == ThreadState.SuspendRequested)//当前状态为正在挂起线程

{

threadReceive.Resume();

threadReceive.Abort();

this.Close();

}

else if

(threadReceive.ThreadState == ThreadState.Unstarted)

{

this.Close();

}

}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)

{if (threadReceive.ThreadState == ThreadState.Running)

//当前状态为启动线程

{

threadReceive.Abort();

this.Close();

}

else if(threadReceive.ThreadState == ThreadState.Suspended)

//当前状态为挂起线程

{

threadReceive.Resume();

threadReceive.Abort();

this.Close();

}

else if

(threadReceive.ThreadState == ThreadState.SuspendRequested)

//当前状态为正在挂起线程

{

threadReceive.Resume();

threadReceive.Abort();

this.Close();
}
}
}
}