1、 int hEvent; ; public struct PRINTER_DEFAULTS public int pDatatype; public int pDevMode; public int DesiredAccess; / / 对齐方式/summary 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、执行打印内容之前,必须先调用StartPrint,准
2、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 Byte Const_Init = new byte 0x1B
3、, 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_SetAlign = 1B 61 private const Str
4、ing 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_SetBigFontBold = 1B 21 38 /private const String Const
5、_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 6A /切纸 private static Byte Const_SetCut = new by
6、te 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 ; #region 常量定义 / 最大字体大小 public const Int32 Const_MaxFontSize = 8;
7、/ 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; / 无效句柄 public const Int32 Const_InvalidHandle = -1; #endregion #region 私有成员 / 打印
8、机句柄 private int m_Handle = -1; / 是否已经初始化 private Boolean m_Inited = false; #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
9、(UnmanagedType.LPStr) string szPrinter, out Int32 hPrinter, IntPtr pd);StartDocPrinterA, SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool StartDocPrinter(Int32 hPrinter, Int32 level, In, MarshalAs(UnmanagedTyp
10、e.LPStruct) DOCINFOA di);EndDocPrinter, SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall) public static extern bool EndDocPrinter(Int32 hPrinter);StartPagePrinter public static extern bool StartPagePrinter(Int32 hPrinter);EndPagePrinter public static extern bo
11、ol EndPagePrinter(Int32 hPrinter);WritePrinter public static extern bool WritePrinter(Int32 hPrinter, Byte pBytes, Int32 dwCount, out Int32 dwWritten);ClosePrinter public static extern bool ClosePrinter(Int32 hPrinter); / 发送指令param name=cmdreturns/returns private Boolean SendCommand(Byte cmd) if (m_
12、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 Const_MaxImageLength | image.Height Const_MaxImageLength) /按照高度和宽度,较大的那一边,进行缩放 image.Height) newwid
13、th = Const_MaxImageLength; newheight = (Int32)(image.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 = GetBitA
14、rray(image, ref bitarray, ref datawidth, ref dataheight); / 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) Boolean bl = LoadImage(i
15、mg, ref bmpbytes, ref width, ref height); / 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imgallbitary public static Boolean GetBitArray(Bitmap img, ref Byte allbitary, ref Int32 width, ref Int32 height) /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; /
16、 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);bl) 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 + Con
17、st_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 ! 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;
18、/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) /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; +colid
19、x) /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; /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
20、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; #region 公开函数 private static ReceiptHelper m_instance = new ReceiptHelper(); / 当前使用的打印机名称 public String PrinterName get
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