C 使用ESC指令控制POS机打印小票

1、C#使用ESC指令控制POS打印机打印小票 1.前言C#打印小票可以与普通打印机一样，调用PrintDocument实现。也可以发送标注你的ESC指令实现。由于 调用PrintDocument类时，无法操作使用串口或TCP/IP接口连接的pos打印机，并且无法发送控制指令实现pos打印机的切纸、走纸等动作。因此个人建议使用ESC指令进行打印会更通用。本类需要调用 ImageProcessor.cs HYPERLINK mailto:25035844qq 25035844qq 2.POS机打印小票ReceiptHelperusing System;using System.Collections

2、.Generic;using System.Text;using System.Runtime.InteropServices;using System.Threading;using System.Drawing;using System.Management;using System.IO;using LaisonTech.MediaLib;using LaisonTech monBLL;using Microsoft.Win32.SafeHandles;namespace LaisonTech.MediaLib#region 结构体定义 StructLayout(LayoutKind.S

3、equential) public struct OVERLAPPED int Internal; int InternalHigh; int Offset; int OffSetHigh; int hEvent; ; StructLayout(LayoutKind.Sequential) public struct PRINTER_DEFAULTS public int pDatatype; public int pDevMode; public int DesiredAccess; / / 对齐方式 / public enum eTextAlignMode Left = 0, Middle

4、 = 1, Right = 2 #endregion / / 小票打印类/ 使用方法:/ 1 GetPrinterList获取已经安装的所有打印机列表./ Open 打开指定打印机/ 2 控制打印机动作、执行打印内容之前，必须先调用StartPrint，准备向打印机发送控制指令/ 3 调用SetLeft, SetBold, SetAlignMode, SetFontSize . .设置打印参数/ 4 PrintText 打印内容.注意：打印该行内容后会自动换行(本类会在该行内容末尾添加一个换行符)/ PrintImageFile 或 PrintBitMap打印图片/ 5 控制指令和打印内容都发

5、送完毕后,调用 EndPrint执行真正打印动作 / 6 退出程序前调用Close / public class ReceiptHelper #region 指令定义 private static Byte Const_Init = new byte 0 x1B, 0 x40, 0 x20, 0 x20, 0 x20, 0 x0A, 0 x1B, 0 x64,0 x10; /设置左边距 private const string Const_SetLeft = 1D 4C ; /设置粗体 private const string Const_SetBold = 1B 45 ; private c

6、onst String Const_Bold_YES = 01; private const String Const_Bold_NO = 00; /设置对齐方式 private const string Const_SetAlign = 1B 61 ; private const String Const_Align_Left = 30; private const String Const_Align_Middle = 31; private const String Const_Align_Right = 32; /设置字体大小,与 SetBigFont 不能同时使用 private c

7、onst string Const_SetFontSize = 1D 21 ; /设置是否大字体,等同于 SetFontSize = 2 /private const String Const_SetBigFontBold = 1B 21 38; /private const String Const_SetBigFontNotBold = 1B 21 30; /private const String Const_SetCancelBigFont = 1B 21 00; / / 打印并走纸 / private static Byte Const_Cmd_Print = new byte 0

8、x1B, 0 x4A, 0 x00 ; /走纸 private const string Const_FeedForward = 1B 4A ; private const string Const_FeedBack = 1B 6A ; /切纸 private static Byte Const_SetCut = new byte 0 x1D, 0 x56, 0 x30; /查询打印机状态 private static Byte Const_QueryID = new byte 0 x1D, 0 x67, 0 x61; /回复帧以 ID 开头 private static String Con

9、st_ResponseQueryID = ID; / / 设置图标的指令 / private static Byte Const_SetImageCommand = new Byte 0 x1B, 0 x2A, 0 x21 ;#endregion #region 常量定义 / / 最大字体大小 / public const Int32 Const_MaxFontSize = 8; / / 最大走纸距离 / public const Int32 Const_MaxFeedLength = 5000; / / 最大高宽 / public const Int32 Const_MaxImageLeng

10、th = 480; / / 每次通信最多打印的行数 / public const Int32 Const_OncePrintRowCount = 24; public const Int32 Const_BrightnessGate = 100; / / 无效句柄 / public const Int32 Const_InvalidHandle = -1; #endregion #region 私有成员 / / 打印机句柄 / private int m_Handle = -1; / / 是否已经初始化 / private Boolean m_Inited = false; #endregio

11、n #region 私有函数 DllImport(winspool.Drv, EntryPoint = OpenPrinterA, SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool OpenPrinter(MarshalAs(UnmanagedType.LPStr) string szPrinter, out Int32 hPrinter, IntPtr pd); D

12、llImport(winspool.Drv, EntryPoint = StartDocPrinterA, SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool StartDocPrinter(Int32 hPrinter, Int32 level, In, MarshalAs(UnmanagedType.LPStruct) DOCINFOA di); DllImport

13、(winspool.Drv, EntryPoint = EndDocPrinter, SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool EndDocPrinter(Int32 hPrinter); DllImport(winspool.Drv, EntryPoint = StartPagePrinter, SetLastError = true, ExactSpelling = true, CallingConve

14、ntion = CallingConvention.StdCall) public static extern bool StartPagePrinter(Int32 hPrinter); DllImport(winspool.Drv, EntryPoint = EndPagePrinter, SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool EndPagePrinter(Int32 hPrinter); DllI

15、mport(winspool.Drv, EntryPoint = WritePrinter, SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool WritePrinter(Int32 hPrinter, Byte pBytes, Int32 dwCount, out Int32 dwWritten); DllImport(winspool.Drv, EntryPoint = ClosePrinter, SetLast

16、Error = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool ClosePrinter(Int32 hPrinter); / / 发送指令 / / / private Boolean SendCommand(Byte cmd) if (m_Handle = Const_InvalidHandle | cmd = null | cmd.Length = cmd.Length); / / 发送文本格式的指令 / / / private Bool

17、ean SendCommand(String hexstrcmd) if (m_Handle = Const_InvalidHandle | hexstrcmd = null | hexstrcmd.Length 4) return false; byte mybyte = null; Boolean bl = DataFormatProcessor.HexStringToBytes(hexstrcmd, out mybyte); bl = SendCommand(mybyte); return bl; #endregion #region 内部处理 - 打印图片 / / 把图片转换为指令字节

18、,图片最大高宽不能超过480 / / / / public static Boolean LoadImage(Bitmap image, ref Byte bitarray,ref Int32 datawidth,ref Int32 dataheight) Int32 newwidth = 0; Int32 newheight = 0; Bitmap destimage = image; Boolean bl = false; /如果高度超过范围,或宽度超过范围,需要进行缩小 if (image.Width Const_MaxImageLength | image.Height Const_M

19、axImageLength) /按照高度和宽度，较大的那一边，进行缩放 if (image.Width image.Height) newwidth = Const_MaxImageLength; newheight = (Int32)(image.Height * newwidth / (float)image.Width); else newheight = Const_MaxImageLength; newwidth = (Int32)(newheight * image.Width / (float)image.Height); bl = ImageProcessor.ResizeIm

20、age(image, newwidth, newheight, ref destimage); /把数据转换为字节数组 bl = GetBitArray(image, ref bitarray, ref datawidth, ref dataheight); return bl; / / 把图片转换为指令字节,图片最大高宽不能超过480 / 如果图片的高度不是24的整数倍,则修改为24的整数倍 / / / / public static Boolean LoadImageFromFile(String imagefilename, ref Byte bmpbytes, ref Int32 wi

21、dth, ref Int32 height) Bitmap img = ImageProcessor.LoadBitImage(imagefilename); if (img = null) return false; Boolean bl = LoadImage(img, ref bmpbytes, ref width, ref height); return bl; / / 把图片转换为位图数组,每个字节的每个比特位,对应当前像素 是否需要打印 / / / / public static Boolean GetBitArray(Bitmap img, ref Byte allbitary,

22、 ref Int32 width, ref Int32 height) if (img = null) return false; /ESC指令格式规定： /1 打印图片时，每条指令最多只打印24行;不足24行的,也要用全0填充满数据字节 /2 打印24行数据时，按照光栅模式纵向获取数据 / 即先获取所有x=0的点（第0列）转换为3个字节； / 再获取所有x=1的点转换为3个字节；.直到获取到最右侧一列的点 /3 打印完当前24行数据后，再获取后续24行的数据内容,直到所有的数据获取完毕 /获取亮度数组 Boolean briary = null; Boolean bl = ImageProc

23、essor.ToBooleanArray(img, Const_BrightnessGate, ref briary); if (!bl) return false; height = img.Height;/如果图像高度不是24整数倍,设置为24的整数倍 if (height % Const_OncePrintRowCount != 0) height = height + Const_OncePrintRowCount - height % Const_OncePrintRowCount; width = img.Width;/如果图像宽度不是8的整数倍,设置为8的整数倍 if (widt

24、h % 8 != 0) width = width + 8 - width % 8; Int32 bytelen = height * width / 8;/每个像素对应1个比特位,因此总字节数=像素位数/8 allbitary = new Bytebytelen; Int32 byteidxInCol = 0;/当前列里首个像素,在目标字节数组里的下标 Int32 byteidx = 0;/当前像素在目标数组里的字节下标 Int32 bitidx = 0;/当前像素在目标数组里当前字节里的比特位下标 Int32 pixidxInCol = 0;/当前像素在当前列里的第几个位置 Int32 p

25、ixidx = 0;/当前像素在原始图片里的下标 Int32 rowidx = 0; /当前 处理的像素点所在行,不能超过 图像高度 Int32 curprocrows = 0;/当前需要处理的行数量 while (rowidx height) /按照纵向次序,把当前列的24个数据,转换为3个字节 for (Int32 colidx = 0; colidx img.Width; +colidx) /如果当前还剩余超过24行没处理,处理24行 if (rowidx + Const_OncePrintRowCount = img.Height) curprocrows = Const_OncePr

26、intRowCount; else /已经不足24行,只处理剩余行数 curprocrows = img.Height - rowidx; pixidxInCol = 0; /本列里从像素0开始处理 for (Int32 y = rowidx; y rowidx + curprocrows; +y) /原始图片里像素位置 pixidx = y * img.Width + colidx; /获取当前像素的亮度值.如果当前像素是黑点,需要把数组里的对应比特位设置为1 if (briarypixidx) bitidx = 7 - pixidxInCol % 8;/最高比特位对应首个像素.最低比特位对

27、应末个像素 byteidx = byteidxInCol + pixidxInCol / 8; /由于最后一段可能不足24行,因此不能使用byteidx+ DataFormatProcessor.SetBitValue(bitidx, true, ref allbitarybyteidx); pixidxInCol+; byteidxInCol += 3;/每列固定24个像素,3个字节 rowidx += Const_OncePrintRowCount; return true; #endregion #region 公开函数 private static ReceiptHelper m_in

28、stance = new ReceiptHelper(); / / 当前使用的打印机名称 / public String PrinterName get;private set; / / 单件模式 / / public static ReceiptHelper GetInstance() return m_instance; / / 获取本机安装的所有打印机 / / public static List GetPrinterList() List ret = new List(); if (PrinterSettings.InstalledPrinters.Count 1) return re

29、t; foreach (String printername in PrinterSettings.InstalledPrinters) ret.Add(printername); return ret; / / 打开打印机 / / / public Boolean Open(String printername) if (m_Inited) return true; Boolean bl = OpenPrinter(printername.Normalize(), out m_Handle, IntPtr.Zero); m_Inited = (bl & m_Handle != 0); ret

30、urn true; / / 开始打印，在打印之前必须调用此函数 / / public Boolean StartPrint() if (!m_Inited) return false; DOCINFOA di = new DOCINFOA(); di.pDocName = My C#.NET RAW Document; di.pDataType = RAW; /Start a document. Boolean bl = StartDocPrinter(m_Handle, 1, di); if (!bl) return false; / Start a page. bl = StartPage

31、Printer(m_Handle); return bl; / / 结束打印，在打印结束之后必须调用此函数 / / public Boolean EndPrint() if (!m_Inited) return false; Boolean bl = EndPagePrinter(m_Handle); bl = EndDocPrinter(m_Handle); return bl; / / 销毁 / / public Boolean Close() if (!m_Inited) return true; m_Inited = false; /关闭设备句柄 ClosePrinter(m_Hand

32、le); m_Handle = -1; return true; / / 打印文本.在调用本函数之前必须先调用正确的 设置字体、左边距 / / / public Boolean PrintText(String content) if (!m_Inited) return false; byte bytes = null; if (content.Length 1) content = ; if (contentcontent.Length - 1 != (char)0 x0D & contentcontent.Length - 1 != (char)0 x0A) content = cont

33、ent + (char)0 x0A; bytes = DataFormatProcessor.StringToBytes(content); bool bl = SendCommand(bytes); return bl; / / 设置对齐方式 / / / public bool SetAlignMode(eTextAlignMode alignmode) if (!m_Inited) return false; String code = String.Empty; switch (alignmode) case eTextAlignMode.Left: code = Const_Align

34、_Left; break; case eTextAlignMode.Middle: code = Const_Align_Middle; break; case eTextAlignMode.Right: code = Const_Align_Right; break; default: code = Const_Align_Left; break; /注意：先低字节后高字节 string str = Const_SetAlign + code; bool bl = SendCommand(str); return bl; / / 设置左边距 / / / public bool SetLeft

35、(int left) if (!m_Inited) return false; /注意：先低字节后高字节 String hexstr = left.ToString(X4); string str = Const_SetLeft + hexstr.Substring(2, 2) + hexstr.Substring(0, 2); bool bl = SendCommand(str); return bl; / / 设置粗体 / / / public Boolean SetBold(Boolean bold) if (!m_Inited) return false; /注意：先低字节后高字节 S

36、tring str = String.Empty; if (bold) str = Const_SetBold + Const_Bold_YES; else str = Const_SetBold + Const_Bold_NO; bool bl = SendCommand(str); return bl; / / 切纸 / / public bool Cut() if (!m_Inited) return false; bool bl = SendCommand(Const_SetCut); return bl; / / 打印图片 / / / public bool PrintImageFi

37、le(String imgfilename) if (!m_Inited) return false; Bitmap img = ImageProcessor.LoadBitImage(imgfilename); if (img = null) return false; Boolean bl = PrintBitmap(img); return bl; / / 打印图片 / / / public bool PrintBitmap(Bitmap bitmap) if (!m_Inited) return false; if (bitmap = null | bitmap.Width Const

38、_MaxImageLength | bitmap.Height Const_MaxImageLength) return false; Byte bitary = null; Int32 width = 0; Int32 height = 0; Boolean bl = GetBitArray(bitmap, ref bitary, ref width, ref height); bl = PrintBitmapBytes(bitary, bitmap.Width, bitmap.Height); return bl; / / 打印图片 / / / public bool PrintBitma

39、pBytes(Byte imgbitarray, Int32 width, Int32 height) if (!m_Inited) return false; Int32 bytes = width * height / 8; /检查是否尺寸符合要求 if (width Const_MaxImageLength | height Const_MaxFeedLength | width 1 | height 1 | imgbitarray = null) return false; /每次获取24行的数据进行发送,这24行的字节数 Int32 blockbytes = width * Cons

40、t_OncePrintRowCount / 8; if (blockbytes 1) return false; Boolean bl = false; /一共需要发送的块数量 Int32 blocks = imgbitarray.Length / blockbytes; /每次发送的数据字节数 = 1B 2A 21 2字节长度 +数据内容 Byte cmdbytes = new Byte5 + blockbytes; /指令 Array.Copy(Const_SetImageCommand, cmdbytes, 3); /数据长度,即 每行的点数 DataFormatProcessor.In

41、t16ToBytes(width, ref cmdbytes, 3); /数据内容 for (Int32 blockidx = 0; blockidx blocks; +blockidx) Array.Copy(imgbitarray, blockidx * blockbytes, cmdbytes, 5, blockbytes); /发送当前指令 bl = SendCommand(cmdbytes); if (!bl) return false; /休眠20毫秒 Thread.Sleep(20); /发送 打印指令 bl = SendCommand(Const_Cmd_Print); if

42、(!bl) return false; return bl; / / 走纸 / / / public bool Feed(int length) if (!m_Inited) return false; if (length Const_MaxFeedLength) length = Const_MaxFeedLength; string len = length.ToString(X2); len = Const_FeedForward + len; bool bl = SendCommand(len); return bl; / / 回退走纸 / / / public bool FeedB

43、ack(int length) if (!m_Inited) return false; if (length Const_MaxFeedLength) length = Const_MaxFeedLength; string len = length.ToString(X2); len = Const_FeedBack + len; bool bl = SendCommand(len); return bl; / / 设置字体大小.本函数不可与SetBigFont同时使用 / / 大小倍率,取值范围 1 - 8 / public bool SetFontSize(Int32 sizerate

44、) if (!m_Inited) return false; if (sizerate Const_MaxFontSize) sizerate = Const_MaxFontSize; sizerate-; String sizecodestr = Const_SetFontSize + sizerate.ToString(X1) + sizerate.ToString(X1); bool bl = SendCommand(sizecodestr); return bl; #endregion 3.图像处理 ImageProcessorusing System;using System.Col

45、lections.Generic;using System.Linq;using System.Text;using System.Drawing;using LaisonTech monBLL;using System.Drawing.Imaging;using System.IO; using System.Drawing.Drawing2D;using System.Windows.Forms;using AForge.Imaging.Filters;namespace LaisonTech.MediaLib / / 图片格式 / public enum ePictureFileForm

46、at Bmp = 0, Gif = 1, Icon = 2, Jpeg = 3, Png = 4, / / 转为灰度图像的方式 / public enum eGrayMode / / 算数平均 / ArithmeticAverage = 0, / / 加权平均 / WeightedAverage = 1, / / 比较2个图片的指定区域范围,像素的相同类型 / public enum eAreaDifferentType / / 所有像素都相同 / AllSame = 0, / / 所有像素都不同 / AllDifferent = 1, / / 部分相同部分不同 / Partial = 2,

47、/ / 图片文件处理 / public class ImageProcessor #region 常量定义 public const Byte Const_BrightnessWhite = 255; public const Byte Const_BrightnessBlack = 0; / / 比较结果的图片里，亮度相同部分的填充颜色 / public static Color Const_SameBrightnessColor = Color.Black; / / 比较结果的图片里，亮度相同部分的填充颜色 / public static Color Const_DifferentBrig

48、htnessColor = Color.White; public const Byte Const_BlackBrightness = 0; public const Byte Const_WhiteBrightness = 255; public const Int32 Const_MaxBrightness = 255; public const Int32 Const_MinBrightness = -255; / / 亮度的中间值 / public const Int32 Const_MiddleBrightness = 128; #endregion #region 屏幕截图,打印

49、 / / 获取屏幕分辨率 / / / public static void GetScreenSize(ref Int32 width, ref Int32 height) height = Screen.PrimaryScreen.Bounds.Height; width = Screen.PrimaryScreen.Bounds.Width; / /截图指定控件上显示的内容 / / / public static Image CaptureControlImage(Control ctrl) if (ctrl = null) return null; Control parent = ct

50、rl; if (ctrl.Parent != null) parent = ctrl.Parent; Point screenPoint = parent.PointToScreen(ctrl.Location); Image ret = new Bitmap(ctrl.Width, ctrl.Height); Graphics g = Graphics.FromImage(ret); g.CopyFromScreen(screenPoint.X, screenPoint.Y, 0, 0, ctrl.Size); g.DrawImage(ret, 0, 0); return ret; #end

51、region #region 装载图片 / / 装载图像文件 / / / public static Image LoadImage(String filename) /Boolean bl = FileProcessor.FileExist(filename); /if (!bl) / / return null; / /Bitmap image = (Bitmap)Bitmap.FromFile(filename); /return image; /以上方法会导致图片文件被锁定,无法删除移动 Byte photodata = null; Boolean bl = FileProcessor

52、.FileExist(filename); if (!bl) return null; bl = FileProcessor.ReadFileBytes(filename, out photodata); if (!bl) return null; MemoryStream ms = null; Image myImage = null; try ms = new MemoryStream(photodata); myImage = Bitmap.FromStream(ms); ms.Close(); catch (System.Exception ex) Console.WriteLine(

53、LoadImage error: + ex.Message); myImage = null; return myImage; / / 装载图像文件 / / / public static Bitmap LoadBitImage(String filename) Bitmap ret = (Bitmap)LoadImage(filename); return ret; / / 保存图片到指定路径 / / / / public static Boolean SaveImage(Image img, String filename) FileProcessor.DeleteFile(filenam

54、e); if (img = null) return false; /获取保存图片的路径，如果路径不存在，新建 String folder = FileProcessor.GetDirectoryName(filename); if (!FileProcessor.DirectoryExist(folder) FileProcessor.CreateDirectory(folder); img.Save(filename); Boolean bl = FileProcessor.FileExist(filename); return bl; #endregion #region 转换图片格式

55、/ / 转换图片格式 / / / / public static Boolean BmpToJpg(String bmpfilename, String jpgfilename) Boolean bl = ChangeFileFormat(bmpfilename, jpgfilename, ePictureFileFormat.Jpeg); return bl; / / 转换图片格式 / / / / / public static Boolean ChangeFileFormat(String srcfilename, String destfilename, ePictureFileForm

56、at destformat) Boolean bl = FileProcessor.FileExist(srcfilename); if (!bl) return false; Image image = Image.FromFile(srcfilename); ImageFormat IFMT = null; switch (destformat) case ePictureFileFormat.Bmp: IFMT = ImageFormat.Bmp; break; case ePictureFileFormat.Gif: IFMT = ImageFormat.Gif; break; cas

57、e ePictureFileFormat.Icon: IFMT = ImageFormat.Icon; break; case ePictureFileFormat.Jpeg: IFMT = ImageFormat.Jpeg; break; case ePictureFileFormat.Png: IFMT = ImageFormat.Png; break; default: IFMT = ImageFormat.Jpeg; break; image.Save(destfilename, IFMT); image.Dispose(); bl = FileProcessor.FileExist(

58、destfilename); if (!bl) return false; Int32 filelen = FileProcessor.GetFileLength(destfilename); return (filelen 0); / / 变成黑白图 / / 原始图 / 模式。0:加权平均 1:算数平均 / public static Bitmap ToGray(Bitmap bitmap, eGrayMode mode = eGrayMode.ArithmeticAverage) if (bitmap = null) return null; int width = bitmap.Widt

59、h; int height = bitmap.Height; byte newColor = 0; try BitmapData srcData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb); unsafe byte* curpix = (byte*)srcData.Scan0.ToPointer(); if (mode = eGrayMode.ArithmeticAverage)/ 算数平均 for (int y = 0; y

60、 height; y+) for (int x = 0; x width; x+) newColor = (byte)(float)(curpix0 + curpix1 + curpix2) / 3.0f); curpix0 = newColor; curpix1 = newColor; curpix2 = newColor; curpix += 3; curpix += srcData.Stride - width * 3; else / 加权平均 for (int y = 0; y height; y+) for (int x = 0; x width; x+) newColor = (b