說明：該程序可能不具備實用性，僅測試用。

一、使用虛擬串口工具VSPD虛擬兩個串口COM1和COM2

二、約定

占一個字節，代碼如下：

using System; using System.Collections.Generic; using System.Linq; using System.Text;namespace COMClient {/// <summary>/// 約定/// </summary>public enum Protocol{Client端發送文件名 = 0,Client端發送數據塊 = 1,Client端發送最后一個數據塊 = 2,Server端本次接收完畢 = 3,Server端結束 = 4} } View Code

三、功能說明：

?COMClient程序監聽COM1串口，COMServer程序監聽COM2串口。COMClient先擇文件，發送，COMServer接收文件。數據分多次發送，每次發送的數據，通過第一個字節判斷發送的這段數據是干啥的，后面的字節是數據本身。

四、COMClient端發送文件

代碼：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO.Ports; using System.IO; using System.Threading;namespace COMClient {public partial class Form1 : Form{#region 變量/// <summary>/// 串口資源/// </summary>private static SerialPort serialPort = null;/// <summary>/// 文件/// </summary>private static FileStream fs = null;private static long index = 0;private static long blockCount;private static int size = 4095;private static DateTime dt;#endregion#region Form1public Form1(){InitializeComponent();}#endregion#region Form1_Loadprivate void Form1_Load(object sender, EventArgs e){serialPort = new SerialPort("COM1");serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);serialPort.Open();}#endregion#region btnConn_Clickprivate void btnConn_Click(object sender, EventArgs e){if (openFileDialog1.ShowDialog() == DialogResult.OK){dt = DateTime.Now;fs = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);blockCount = (fs.Length - 1) / size + 1;List<byte> bList = new List<byte>();bList.Add((int)Protocol.Client端發送文件名);bList.AddRange(ASCIIEncoding.UTF8.GetBytes(openFileDialog1.FileName));byte[] bArr = bList.ToArray();serialPort.Write(bArr, 0, bArr.Length);}}#endregion/// <summary>/// 接收串口數據事件/// </summary>public void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e){if (serialPort.BytesToRead == 0) return;int bt = serialPort.ReadByte();switch (bt){case (int)Protocol.Server端本次接收完畢:if (index != blockCount - 1){byte[] bArr = new byte[size + 1];bArr[0] = (int)Protocol.Client端發送數據塊;fs.Read(bArr, 1, size);index++;Thread.Sleep(1);serialPort.Write(bArr, 0, bArr.Length);}else{byte[] bArr = new byte[fs.Length - (size * index) + 1];bArr[0] = (int)Protocol.Client端發送最后一個數據塊;fs.Read(bArr, 1, bArr.Length - 1);index++;serialPort.Write(bArr, 0, bArr.Length);}break;case (int)Protocol.Server端結束:index = 0;double totalSeconds = DateTime.Now.Subtract(dt).TotalSeconds;MessageBox.Show("完成，耗時" + totalSeconds + "秒，速度" + (fs.Length / 1024.0 / totalSeconds).ToString("#.0") + "KB/S");fs.Close();fs.Dispose();break;}}} } View Code

五、COMServer端接收文件

代碼：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO.Ports; using System.IO;namespace COMServer {public partial class Form1 : Form{#region 變量/// <summary>/// 串口資源/// </summary>private static SerialPort serialPort = null;/// <summary>/// 文件/// </summary>private static FileStream fs = null;#endregion#region Form1public Form1(){InitializeComponent();}#endregion#region Form1_Loadprivate void Form1_Load(object sender, EventArgs e){serialPort = new SerialPort("COM2");serialPort.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived);serialPort.Open();}#endregion/// <summary>/// 接收串口數據事件/// </summary>public void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e){if (serialPort.BytesToRead == 0) return;#region 接收數據int bt = serialPort.ReadByte();List<byte> bList = new List<byte>();while (serialPort.BytesToRead > 0){byte[] bArr = new byte[serialPort.BytesToRead];serialPort.Read(bArr, 0, bArr.Length);bList.AddRange(bArr);}byte[] receiveData = bList.ToArray();#endregionswitch (bt){case (int)Protocol.Client端發送文件名:string path = ASCIIEncoding.UTF8.GetString(receiveData);string fileName = Path.GetFileName(path);fs = new FileStream(@"d:\_臨時文件\COM測試" + fileName, FileMode.Create, FileAccess.Write);byte[] bArr = new byte[1];bArr[0] = (int)Protocol.Server端本次接收完畢;serialPort.Write(bArr, 0, bArr.Length);break;case (int)Protocol.Client端發送數據塊:fs.Write(receiveData, 0, receiveData.Length);fs.Flush();bArr = new byte[1];bArr[0] = (int)Protocol.Server端本次接收完畢;serialPort.Write(bArr, 0, bArr.Length);break;case (int)Protocol.Client端發送最后一個數據塊:fs.Write(receiveData, 0, receiveData.Length);fs.Flush();bArr = new byte[1];bArr[0] = (int)Protocol.Server端結束;serialPort.Write(bArr, 0, bArr.Length);fs.Close();fs.Dispose();break;}}} } View Code

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轉載于:https://www.cnblogs.com/s0611163/p/4137943.html

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