c#打开pos钱箱usb，lpt端口

打开pos钱箱的源代码，一般网上找的没有usb打印机的，这个可以usb打印机

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using System.IO.Ports;
using System.Drawing.Printing;

namespace testprint
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void button1_Click（object sender EventArgs e）
        {
            Int32 port = 9100;
            string bigFont = （（char）27）.ToString（） + （（char）33）.ToString（） + （（char）213）.ToString（）;//放大字体       
            TcpClient client = new TcpClient（）;
            try
            {
                client.Connect（“192.168.0.200“ port）;

                Byte[] data = new byte[]{0x1B0x76};
                NetworkStream stream = client.GetStream（）;
                stream.Write（data 0 data.Length）;
               
                //data = System.Text.Encoding.Default.GetBytes（bigFont）;
                //stream.Write（data 0 data.Length）;
                //data = System.Text.Encoding.Default.GetBytes（“打印机测试/n“）;
                //stream.Write（data 0 data.Length）;
                //data = System.Text.Encoding.Default.GetBytes（“-             -/n“）;
                //stream.Write（data 0 data.Length）;
                //data = System.Text.Encoding.Default.GetBytes（“-             -/n“）;
                //stream.Write（data 0 data.Length）;
                stream.Close（）;

            }
            catch （Exception ex）
            {
                MessageBox.Show（ex.Message）;
                //如果打印机没开或者异常在此处增加处理代码我通常是把异常数据放到一个DataTable中加个Timer来判断打印机正常就把

                //数据发给打印机并从表中移除.

                //打印机缺纸或者纸匣打开时不会出现异常不用特殊代码判断数据不会丢失.
            }
            finally
            {
                client.Close（）;
            }


        }

        private void button2_Click（object sender EventArgs e）
        {
            Ping p1 = new Ping（）; //只是演示，没有做错误处理      
            PingReply reply = p1.Send（this.textBox1.Text）;//
            displayReply（reply）;
        }
    private void displayReply（PingReply reply） //显示结果  
 {     
        StringBuilder sbuilder ;   
        if （reply.Status == IPStatus.Success）  
        {         
            sbuilder = new StringBuilder（）;  
            sbuilder.Append（string.Format（“Address: {0} “ reply.Address.ToString （）））;    
            sbuilder.Append（string.Format（“RoundTrip time: {0} “ reply.RoundtripTime））;   
            sbuilder.Append（string.Format（“Time to live: {0} “ reply.Options.Ttl））;      
            sbuilder.Append（string.Format（“Don‘t fragment: {0} “ reply.Options.DontFragment））;  
            sbuilder.Append（string.Format（“Buffer size: {0} “ reply.Buffer.Length））;      
            listBox1.Items.Add（sbuilder.ToString（））;   
        }  
    }

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      81920  2007-03-15 11:09  testprint\bin\Debug\POSDLL.dll

     文件      12800  2013-02-24 23:39  testprint\bin\Debug\testprint.exe

     文件      26112  2013-02-24 23:39  testprint\bin\Debug\testprint.pdb

     文件      11600  2013-02-24 23:39  testprint\bin\Debug\testprint.vshost.exe

     文件       6589  2013-02-24 23:39  testprint\Form1.cs

     文件       4996  2013-02-24 23:39  testprint\Form1.Designer.cs

     文件       5817  2013-02-24 23:39  testprint\Form1.resx

     文件       4501  2013-02-24 18:47  testprint\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       6399  2013-02-24 23:39  testprint\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        380  2013-02-24 23:39  testprint\obj\x86\Debug\GenerateResource.read.1.tlog

     文件        866  2013-02-24 23:39  testprint\obj\x86\Debug\GenerateResource.write.1.tlog

     文件       1006  2013-02-24 23:39  testprint\obj\x86\Debug\testprint.csproj.FileListAbsolute.txt

     文件      12800  2013-02-24 23:39  testprint\obj\x86\Debug\testprint.exe

     文件        180  2013-02-24 23:39  testprint\obj\x86\Debug\testprint.Form1.resources

     文件      26112  2013-02-24 23:39  testprint\obj\x86\Debug\testprint.pdb

     文件        180  2013-02-24 23:39  testprint\obj\x86\Debug\testprint.Properties.Resources.resources

     文件        490  2013-02-24 01:04  testprint\Program.cs

     文件       1350  2013-02-24 01:04  testprint\Properties\AssemblyInfo.cs

     文件       2868  2013-02-24 01:04  testprint\Properties\Resources.Designer.cs

     文件       5612  2013-02-24 01:04  testprint\Properties\Resources.resx

     文件       1094  2013-02-24 01:04  testprint\Properties\Settings.Designer.cs

     文件        249  2013-02-24 01:04  testprint\Properties\Settings.settings

     文件       5671  2013-02-24 20:36  testprint\RawPrinterHelper.cs

     文件       3724  2013-02-24 23:39  testprint\testprint.csproj

     文件        869  2013-02-24 01:04  testprint.sln

     目录          0  2013-02-24 01:04  testprint\obj\x86\Debug\TempPE

     目录          0  2013-02-24 23:39  testprint\obj\x86\Debug

     目录          0  2013-02-24 23:39  testprint\bin\Debug

     目录          0  2013-02-24 01:04  testprint\obj\x86

     目录          0  2013-02-24 23:38  testprint\bin

............此处省略6个文件信息