调用打印机打印

获取本地打印机

 //获取打印机列表
        private void GetPrinters()
        {
            PrintDocument prtDoc = new PrintDocument();
            string strDefaultprinter = prtDoc.PrinterSettings.PrinterName;
            foreach (string strPrinter in PrinterSettings.InstalledPrinters)
            {
                cboxPrinter.Items.Add(strPrinter);
            }
            cboxPrinter.SelectedIndex = cboxPrinter.Items.IndexOf(strDefaultprinter);
        }

打印机帮助类

//打印机帮助类

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Printing;
using System.Runtime.InteropServices;
using System.IO;

namespace DBUtility
{
    public class RawPrinterHelper
    {
        // 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.
        public 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 = "DirectPrint RAW Document";
            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;
        }

        public 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);
            fs.Close();
            return bSuccess;
        }
        public static bool SendStringToPrinter(string szPrinterName, string szString)
        {
            IntPtr pBytes;
            Int32 dwCount;
            // How many characters are in the string?
            dwCount = szString.Length;
            // Assume that the printer is expecting ANSI text, and then convert
            // the string to ANSI text.
            pBytes = Marshal.StringToCoTaskMemAnsi(szString);
            // Send the converted ANSI string to the printer.
            SendBytesToPrinter(szPrinterName, pBytes, dwCount);
            Marshal.FreeCoTaskMem(pBytes);
            return true;
        }
    }
}

打印调用

     //打印
        private void button5_Click(object sender, EventArgs e)
        {
            if (cboxPrinter.SelectedIndex < 0)
            {
                MessageBox.Show("请选择打印机!", "系统提示");
                return;
            }

            if (this.lblID.Text != "")
            {
                String strPrint = "";
                String cmbProject = this.cmbProject.Text;
                String txtTaskNumber = this.txtTaskNumber.Text; ;
                String txtPlan_Qty = this.txtPlan_Qty.Text; ;
                String txtSTD_Housrs = this.txtSTD_Housrs.Text; ;
                String txtComplete_Qty = this.txtComplete_Qty.Text; ;
                StringBuilder textToPrint = new StringBuilder();

                strPrint = string.Format(@"<STX>R<ETX>
                                    <STX><ESC>C<SI>W791<SI>h<ETX>
                                    <STX><ESC>P<ETX>
                                    <STX>F*<ETX>
                                    <STX>B1;f3;o218,307;c6,0,0,2;w3;h102;d3,{0}<ETX>
                                    <STX>H2;f3;o118,307;c60;b0;h17;w17;d3,{0}<ETX>
                                    <STX>H3;f3;o72,307;c60;b0;h17;w17;d3,{1}<ETX>
                                    <STX>D0<ETX>
                                    <STX>R<ETX>
                                    <STX><SI>l13<ETX>
                                    <STX><ESC>E*,1<CAN><ETX>
                                    <STX><RS>1<US>1<ETB><ETX>", cmbProject, txtTaskNumber);

                textToPrint.Append(strPrint);
                printLab(textToPrint.ToString());

            }
            else
            {
                MessageBox.Show("列表中无数据");
                return;

            }
        }


        private void printLab(String textToPrint)
        {
            FileStream fs = new FileStream(Environment.GetEnvironmentVariable("TEMP") + "\Labeltmp.prn", FileMode.Create);
            fs.Write(System.Text.Encoding.GetEncoding("GB2312").GetBytes(textToPrint), 0, System.Text.Encoding.GetEncoding("GB2312").GetByteCount(textToPrint));
            fs.Close();

            try
            {
                if (DBUtility.RawPrinterHelper.SendFileToPrinter(cboxPrinter.Text, Environment.GetEnvironmentVariable("TEMP") + "\Labeltmp.prn") == true)
                {
                    MessageBox.Show("打印成功！");
                }
                else
                {
                    MessageBox.Show("打印失败！");
                }
            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                return;
            }
          
        }