Printer類代碼：

using System; using System.Linq; using System.Collections.Generic; using System.Text; using System.IO.Ports; using System.Collections; using System.Windows.Forms; using System.Drawing;namespace PrinterTest {public class Printer{private static SerialPort serialPort; //串口public Printer(string portName){try{////串口初始化//serialPort = new SerialPort();serialPort.PortName = portName;serialPort.BaudRate = 9600;//波特率serialPort.Parity = System.IO.Ports.Parity.Odd;//奇校驗serialPort.StopBits = System.IO.Ports.StopBits.One;//停止位OpenPort();}catch{MessageBox.Show(e.ToString());}}public Printer(){try{////串口初始化//serialPort = new SerialPort();serialPort.PortName = "COM2";serialPort.BaudRate = 9600;//波特率serialPort.Parity = System.IO.Ports.Parity.Odd;//奇校驗serialPort.StopBits = System.IO.Ports.StopBits.One;//停止位OpenPort();}catch{MessageBox.Show(e.ToString());}}private void OpenPort(){if (null != serialPort){try{if (!serialPort.IsOpen)serialPort.Open();}catch{MessageBox.Show(e.ToString());}}}private void ClosePort(){try{if (serialPort.IsOpen)serialPort.Close();serialPort.Dispose();}catch{MessageBox.Show(e.ToString());}}public void Write(byte[] data,int len){try{serialPort.Write(data, 0, len);}catch(Exception e){MessageBox.Show(e.ToString());}}/// <summary>/// 向打印機發送命令/// </summary>/// <param name="data">命令數據</param>public void Write(params byte[] data){try{serialPort.Write(data, 0,data.Length );}catch (Exception e){MessageBox.Show(e.ToString());}}/// <summary>/// 發送字符串/// </summary>/// <param name="strBuf">要發送的字符串</param>public void Write(string strBuf){try{byte[] data = ToHex(strBuf, "GB2312");serialPort.Write(data, 0, data.Length);}catch (Exception e){MessageBox.Show(e.ToString());}}/// <summary>/// 根據編碼方式轉換字符串為byte[]/// </summary>/// <param name="str">目標字符串</param>/// <param name="charset">編碼方式</param>/// <returns>轉換后的byte[]</returns>private byte[] ToHex(string str, string charset)//{if (str.Length % 2 != 0)str += "";Encoding enc = Encoding.GetEncoding(charset);return enc.GetBytes(str);}/// <summary>/// 圖片取模/// </summary>/// <param name="bmp"></param>/// <returns></returns>private byte[,] GetBytesByBMP(Bitmap bmp){//bitArray存儲像素點bool[,] bitArray = new bool[bmp.Height % 8 == 0 ?bmp.Height : (bmp.Height / 8 + 1) * 8, bmp.Width];for (int i = 0; i < bmp.Width; ++i)//獲取圖片點陣{for (int j = 0; j < bmp.Height; ++j){//獲取點的ARGBColor pixel = bmp.GetPixel(i, j);double gray = pixel.R * 0.299 +pixel.G * 0.587 + pixel.B * 0.114;if (gray < 192)//是深色bitArray[j, i] = true;else //非深色(淺色)bitArray[j, i] = false;}}byte[,] res =//存儲字模new byte[bitArray.GetLength(0) / 8, bitArray.GetLength(1)];int resRow = 0, resCol = 0;for (int i = 0; i < bmp.Height; i = i + 8){resCol = 0;for (int j = 0; j < bmp.Width; ++j){byte b = 0;//二進制轉十進制for (int k = (i + 7), p = 0; k > i - 1; --k){b += (byte)((bitArray[k, j] ? 1 : 0) *Math.Pow(2, p++));}res[resRow, resCol++] = b;}++resRow;}return res;}/// <summary>/// 打印圖片/// </summary>/// <param name="bmp">圖片</param>/// <param name="enlarge">放大倍數</param>public void printImage(Bitmap bmp){byte[,] gImage = GetBytesByBMP(bmp);for (int i = gImage.GetLength(0) - 1; i >= 0; --i){byte lowLen = (byte)((gImage.GetLength(1) << 8) >> 8);byte highLen = (byte)(gImage.GetLength(1) >> 8);Write(0x1B, 0x4B, lowLen, highLen);for (int j = 0; j < gImage.GetLength(1); j++)Write(gImage[i, j]);Write(0x0D);}}} }

調用類方法：

Printer p = new Printer("COM2");//生成實例 p.Write(myArray,myArray.Lenth);發送定長數組 p.Write(0x1B, 0x40);//發送不定長數字串 p.Write("發送字符串 Send String");//發送字符串 p.printImage(new Bitmap);//發送圖片

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