BBMPT1/InjectionPC/LabelPrint.cs

using System;
using System.Collections.Generic;
using System.Drawing.Printing;
using System.IO;
using System.IO.Ports;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace InjectionPC
{
    public class LabelPrint
    {
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr CreateFile(string IpFileName, int dwDesiredAccess, int dwShareMode, int IpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);
        [DllImport("fnthex32.dll", CharSet = CharSet.Auto)]
        public static extern int GETFONTHEX(string barcodeText, string fontName, string fileName, int orient, int height, int width, int isBold, int isItalic, StringBuilder returnBarcodeCMD);
        // 打印中文用

        const int OPEN_EXISTING = 3;

        public void PrintLine(string str, string myPort, string messageshow)
        {
            try
            {
                if (myPort.Substring(0, 3).Equals("USB", StringComparison.CurrentCultureIgnoreCase))
                {
                    PrinterSettings ps = new PrinterSettings();
                    PrinterHelper.SendStringToPrinter(ps.PrinterName, str.Replace("\r\n", ""));
                    if (messageshow == "Y")
                    {
                        MessageBox.Show("打印完毕！");
                    }
                }
                else if (myPort.Substring(0, 3).Equals("LPT", StringComparison.CurrentCultureIgnoreCase))
                {
                    IntPtr iHandle = CreateFile(myPort, 0x40000000, 0, 0, OPEN_EXISTING, 0, 0);
                    if (iHandle.ToInt32() == -1)
                    {
                        MessageBox.Show("LPT1 Port Open Failed!");
                    }
                    FileStream fs = new FileStream(iHandle, FileAccess.ReadWrite);
                    StreamWriter sw = new StreamWriter(fs, Encoding.Default);

                    sw.WriteLine(str);
                    sw.Close();
                    fs.Close();
                    if (messageshow == "Y")
                    {
                        MessageBox.Show("打印完毕！");
                    }
                }
                else if (myPort.Substring(0, 3).Equals("COM", StringComparison.CurrentCultureIgnoreCase))
                {
                    //SerialPort com = new SerialPort(myPort, 9600, Parity.Even, 7, StopBits.One);
                    SerialPort com = new SerialPort(myPort, 115200, Parity.None, 8, StopBits.One);
                    com.Open();
                    com.Write(str);   //(str.Replace("\r\n", ""));
                    com.Close();
                    if (messageshow == "Y")
                    {
                        MessageBox.Show("打印完毕！");
                    }
                }
                else if (myPort.Substring(0, 3).Equals("TCP", StringComparison.CurrentCultureIgnoreCase))
                {
                    PrinterHelper.tcpPrint(str);
                }

            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}