c# 在进行小票打印时大致有三种方法。
1. 使用水晶报表进行打印。可以参考：https://www.cnblogs.com/aitong/p/10717786.html
2. 在 PrintDocument 对象上进行绘图，然后使用其打印方法直接打印。
using CrystalDecisions.CrystalReports.Engine; using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Printing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace CrTest { public partial class Form1 : Form { string title = "标题标题标题标题标题标题标题标题标题标题标题"; public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { //打印预览 PrintPreviewDialog ppd = new PrintPreviewDialog(); PrintDocument pd = new PrintDocument(); //设置边距 Margins margin = new Margins(10, 10, 10, 10); pd.DefaultPageSettings.Margins = margin; int height = 30; if (title.Length > 13) { height = 60; } //纸张设置默认 PaperSize pageSize = new PaperSize("First custom size", (int)(58 * 100 / 25.4), height);//58mm 转绘图宽度 pd.DefaultPageSettings.PaperSize = pageSize; //打印事件设置 pd.PrintPage += new PrintPageEventHandler(pd_PrintPage); ppd.Document = pd; ppd.ShowDialog(); //try //{ // pd.Print(); //} //catch (Exception ex) //{ // MessageBox.Show(ex.Message, "打印出错", MessageBoxButtons.OK, MessageBoxIcon.Error); // pd.PrintController.OnEndPrint(pd, new PrintEventArgs()); //} } private void pd_PrintPage(object sender, PrintPageEventArgs e) { Font font = new Font("Arial", 10, System.Drawing.FontStyle.Regular); string text = title; int yLocation = e.MarginBounds.Y; int center = e.PageSettings.PaperSize.Width / 2 ; int heightStep = 0; while (text.Length > 0) { string printStr; if (text.Length > 13) { printStr = text.Substring(0, 13); text = text.Substring(13); } else { printStr = text; text = ""; } SizeF size = e.Graphics.MeasureString(printStr, font); heightStep =Convert.ToInt32( size.Height * 1.3); e.Graphics.DrawString(printStr, font, System.Drawing.Brushes.Black, center - size.Width / 2, yLocation); yLocation += heightStep; } } } }
3. 使用 ESC/POS 控制指令
注意 SendStringToPrinter 这个接口。
using System; using System.Collections.Generic; using System.Drawing; using System.IO; using System.Linq; using System.Runtime.InteropServices; using System.Text; using System.Threading; using System.Threading.Tasks; //https://www.cnblogs.com/QiuTianBaBa/p/6730829.html //https://blog.csdn.net/andrewniu/article/details/80353655 namespace Evet2Basic.Model.Print.Report { public class RawPrint { // Structure and API declarions: [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public class DOCINFOA { [MarshalAs(UnmanagedType.LPStr)] public string pDocName; [MarshalAs(UnmanagedType.LPStr)] public string pOutputFile; [MarshalAs(UnmanagedType.LPStr)] public string pDataType; } [DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter, out IntPtr hPrinter, IntPtr pd); [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool ClosePrinter(IntPtr hPrinter); [DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool StartDocPrinter(IntPtr hPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DOCINFOA di); [DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool EndDocPrinter(IntPtr hPrinter); [DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool StartPagePrinter(IntPtr hPrinter); [DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool EndPagePrinter(IntPtr hPrinter); [DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool WritePrinter(IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, out Int32 dwWritten); // SendBytesToPrinter() // When the function is given a printer name and an unmanaged array // of bytes, the function sends those bytes to the print queue. // Returns true on success, false on failure. private static bool SendBytesToPrinter(string szPrinterName, IntPtr pBytes, Int32 dwCount) { Int32 dwError = 0, dwWritten = 0; IntPtr hPrinter = new IntPtr(0); DOCINFOA di = new DOCINFOA(); bool bSuccess = false; // Assume failure unless you specifically succeed. di.pDocName = "XiaoPiao"; di.pDataType = "RAW"; // Open the printer. if (OpenPrinter(szPrinterName.Normalize(), out hPrinter, IntPtr.Zero)) { // Start a document. if (StartDocPrinter(hPrinter, 1, di)) { // Start a page. if (StartPagePrinter(hPrinter)) { // Write your bytes. bSuccess = WritePrinter(hPrinter, pBytes, dwCount, out dwWritten); EndPagePrinter(hPrinter); } EndDocPrinter(hPrinter); } ClosePrinter(hPrinter); } // If you did not succeed, GetLastError may give more information // about why not. if (bSuccess == false) { dwError = Marshal.GetLastWin32Error(); } return bSuccess; } private static bool SendFileToPrinter(string szPrinterName, string szFileName) { // Open the file. FileStream fs = new FileStream(szFileName, FileMode.Open); // Create a BinaryReader on the file. BinaryReader br = new BinaryReader(fs); // Dim an array of bytes big enough to hold the file's contents. Byte[] bytes = new Byte[fs.Length]; bool bSuccess = false; // Your unmanaged pointer. IntPtr pUnmanagedBytes = new IntPtr(0); int nLength; nLength = Convert.ToInt32(fs.Length); // Read the contents of the file into the array. bytes = br.ReadBytes(nLength); // Allocate some unmanaged memory for those bytes. pUnmanagedBytes = Marshal.AllocCoTaskMem(nLength); // Copy the managed byte array into the unmanaged array. Marshal.Copy(bytes, 0, pUnmanagedBytes, nLength); // Send the unmanaged bytes to the printer. bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, nLength); // Free the unmanaged memory that you allocated earlier. Marshal.FreeCoTaskMem(pUnmanagedBytes); return bSuccess; } public static bool SendBytesToPrinter(string szPrinterName, byte[] buf) { bool bSuccess = false; // Your unmanaged pointer. IntPtr pUnmanagedBytes = new IntPtr(0); // Allocate some unmanaged memory for those bytes. pUnmanagedBytes = Marshal.AllocCoTaskMem(buf.Length); // Copy the managed byte array into the unmanaged array. Marshal.Copy(buf, 0, pUnmanagedBytes, buf.Length); // Send the unmanaged bytes to the printer. bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, buf.Length); // Free the unmanaged memory that you allocated earlier. Marshal.FreeCoTaskMem(pUnmanagedBytes); return bSuccess; } /// <summary> /// 切纸 /// </summary> /// <param name="szPrinterName">打印机名</param> /// <returns></returns> public static bool Cut(string szPrinterName) { bool bSuccess = false; IntPtr pUnmanagedBytes = new IntPtr(0); byte[] data = new byte[] { 0x1B, 0x69 }; pUnmanagedBytes = Marshal.AllocCoTaskMem(data.Length); Marshal.Copy(data, 0, pUnmanagedBytes, data.Length); bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, data.Length); Marshal.FreeCoTaskMem(pUnmanagedBytes); return true; } public static bool SendBytesToPrinterImg(string szPrinterName, Bitmap bmp, bool needWarning) { bool bSuccess = false; //Byte[] byte_send = Encoding.GetEncoding("GB2312").GetBytes("x1bx40"); IntPtr pUnmanagedBytes = new IntPtr(0); //pUnmanagedBytes = Marshal.AllocCoTaskMem(byte_send.Length); //Marshal.Copy(byte_send, 0, pUnmanagedBytes, byte_send.Length); //bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, byte_send.Length); //Marshal.FreeCoTaskMem(pUnmanagedBytes); byte[] data = new byte[] { 0x1B, 0x33, 0x00 }; //pUnmanagedBytes = new IntPtr(0); pUnmanagedBytes = Marshal.AllocCoTaskMem(data.Length); Marshal.Copy(data, 0, pUnmanagedBytes, data.Length); bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, data.Length); Marshal.FreeCoTaskMem(pUnmanagedBytes); data[0] = (byte)'x00'; data[1] = (byte)'x00'; data[2] = (byte)'x00'; Color pixelColor; // ESC * m nL nH 点阵图 byte[] escBmp = new byte[] { 0x1B, 0x2A, 0x00, 0x00, 0x00 }; escBmp[2] = (byte)'x21'; //nL, nH escBmp[3] = (byte)(bmp.Width % 256); escBmp[4] = (byte)(bmp.Width / 256); // data for (int i = 0; i < (bmp.Height / 24) + 1; i++) { //pUnmanagedBytes = new IntPtr(0); pUnmanagedBytes = Marshal.AllocCoTaskMem(escBmp.Length); Marshal.Copy(escBmp, 0, pUnmanagedBytes, escBmp.Length); bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, escBmp.Length); Marshal.FreeCoTaskMem(pUnmanagedBytes); byte[] temptype = new byte[bmp.Width * 3]; int lengthNow = 0; for (int j = 0; j < bmp.Width; j++) { for (int k = 0; k < 24; k++) { if (((i * 24) + k) < bmp.Height) // if within the BMP size { pixelColor = bmp.GetPixel(j, (i * 24) + k); if (pixelColor.R == 0) { data[k / 8] += (byte)(128 >> (k % 8)); } } } data.CopyTo(temptype, lengthNow); lengthNow += 3; data[0] = (byte)'x00'; data[1] = (byte)'x00'; data[2] = (byte)'x00'; } //pUnmanagedBytes = new IntPtr(0); pUnmanagedBytes = Marshal.AllocCoTaskMem(temptype.Length); Marshal.Copy(temptype, 0, pUnmanagedBytes, temptype.Length); bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, temptype.Length); Marshal.FreeCoTaskMem(pUnmanagedBytes); System.Threading.Thread.Sleep(10); } byte[] dataClear = new byte[] { 0x1B, 0x40 }; pUnmanagedBytes = Marshal.AllocCoTaskMem(dataClear.Length); Marshal.Copy(dataClear, 0, pUnmanagedBytes, dataClear.Length); bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, dataClear.Length); Marshal.FreeCoTaskMem(pUnmanagedBytes); return bSuccess; } public static bool SendStringToPrinter(string szPrinterName, string szString) { try { //指令见打印机官方文档 http://www.xprinter.net/index.php/Server/index/cid/3 byte[] smallArray = new byte[] { 29, 33, 0 }; List<byte> list = new List<byte>(); list.AddRange(smallArray); while (szString.Contains("<B>") || szString.Contains("<A>")) { if (!szString.Contains("<B>")) { ReplaceAB(ref szString, ref list, 2); } else if (!szString.Contains("<A>")) { ReplaceAB(ref szString, ref list, 3); } else { int indexA = szString.IndexOf("<A>"); int indexB = szString.IndexOf("<B>"); if (indexA < indexB) { ReplaceAB(ref szString, ref list, 2); } else { ReplaceAB(ref szString, ref list, 3); } } } Encoding enc = Encoding.GetEncoding("gb2312"); list.AddRange(enc.GetBytes(szString)); return RawPrint.SendBytesToPrinter(szPrinterName, list.ToArray()); } catch (Exception) { return false; } } private static void ReplaceAB(ref string szString, ref List<byte> list, int mul) { //指令见打印机官方文档 http://www.xprinter.net/index.php/Server/index/cid/3 string replaceStr1 = "<B>"; string replaceStr2 = "</B>"; byte[] smallArray = new byte[] { 29, 33, 0 }; byte[] bigArray = new byte[] { 29, 33, 34 }; //放大三倍 //29, 33字体放大指令 34放大倍数 ( 0一倍 17两倍 34三倍 51四倍 68五倍 85六倍) if (mul == 2) { replaceStr1 = "<A>"; replaceStr2 = "</A>"; bigArray = new byte[] { 29, 33, 17 }; //放大两倍 } Encoding enc = Encoding.GetEncoding("gb2312"); int index = szString.IndexOf(replaceStr1); string first = szString.Substring(0, index); list.AddRange(enc.GetBytes(first));//第一段 list.AddRange(bigArray);//变成大写 szString = szString.Substring(index + 3); int index2 = szString.IndexOf(replaceStr2); string second = szString.Substring(0, index2); list.AddRange(enc.GetBytes(second));//大写段 list.AddRange(smallArray);//变小写 szString = szString.Substring(index2 + 4); } } }