C使用ESC指令控制POS机打印小票.docx

1、C使用ESC指令控制POS机打印小票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 2.POS机打印小票ReceiptHelperusing System;using ;using System.Text;using ;using System.

2、Threading;using System.Drawing;using System.Management;using System.IO;using LaisonTech.MediaLib;using LaisonTech.CommonBLL;using ;namespace LaisonTech.MediaLib#region 结构体定义 StructLayout(LayoutKind.Sequential) public struct OVERLAPPED int Internal; int InternalHigh; int Offset; int OffSetHigh; int h

3、Event; ; 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 = 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

4、、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 By

5、te Const_Init = new byte 0x1B, 0x40, 0x20, 0x20, 0x20, 0x0A, 0x1B, 0x64,0x10; /设置左边距 private const string Const_SetLeft = 1D 4C ; /设置粗体 private const string Const_SetBold = 1B 45 ; private const String Const_Bold_YES = 01; private const String Const_Bold_NO = 00; /设置对齐方式 private const string Const_S

6、etAlign = 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 const string Const_SetFontSize = 1D 21 ; /设置是否大字体,等同于 SetFontSize = 2 /private const String Const_SetBigFontBol

7、d = 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 0x1B, 0x4A, 0x00 ; /走纸 private const string Const_FeedForward = 1B 4A ; private const string Const_FeedBack = 1B

8、 6A ; /切纸 private static Byte Const_SetCut = new byte 0x1D, 0x56, 0x30; /查询打印机状态 private static Byte Const_QueryID = new byte 0x1D, 0x67, 0x61; /回复帧以 ID 开头 private static String Const_ResponseQueryID = ID; / / 设置图标的指令 / private static Byte Const_SetImageCommand = new Byte 0x1B, 0x2A, 0x21 ;#endregio

9、n #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_MaxImageLength = 480; / / 每次通信最多打印的行数 / public const Int32 Const_OncePrintRowCount = 24; public const Int32 Const_BrightnessGate = 100

10、; / / 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; #endregion #region 私有函数 DllImport(winspool.Drv, EntryPoint = OpenPrinterA, SetLastError = true, CharSet = CharSet.Auto, ExactSpelli

11、ng = true, CallingConvention = CallingConvention.StdCall) public static extern bool OpenPrinter(MarshalAs(UnmanagedType.LPStr) string szPrinter, out Int32 hPrinter, IntPtr pd); DllImport(winspool.Drv, EntryPoint = StartDocPrinterA, SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, C

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

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

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

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

16、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 Boolean SendCommand(String hexstrcmd) if (m_Handle = Const_InvalidHandle | hexstrcmd = null | hexstrcmd.Length 4) return false

17、; 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,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 datah

18、eight) 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_MaxImageLength) /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)(ima

19、ge.Height * newwidth / (float)image.Width); else newheight = Const_MaxImageLength; newwidth = (Int32)(newheight * image.Width / (float)image.Height); bl = ImageProcessor.ResizeImage(image, newwidth, newheight, ref destimage); /把数据转换为字节数组 bl = GetBitArray(image, ref bitarray, ref datawidth, ref datah

20、eight); 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 width, ref Int32 height) Bitmap img = ImageProcessor.LoadBitImage(imagefilename); if (img = null) return false; Boolean bl =

21、 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, 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

22、 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 = ImageProcessor.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

23、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 (width % 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 B

24、ytebytelen; 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 pixidx = 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)

25、 /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_OncePrintRowCount; 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;

26、 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_instance = new ReceiptHelper(); /