比如本地建立一个文本文件 打印一个数字456在本地的打印机上，同时控制台能截获这个数据，并保存就算成了
现本人通过监听打印端口 已经截获一段十六进制数据包 到好像加密的 估计这个方法行不通 看看大家有没有其他思路办法
程序如何与打印机数据通讯，通讯解决了就抓包获取数据
```c#
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Printing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Printer
{undefined
public partial class Form1 : Form
{undefined
public Form1()
{undefined
InitializeComponent();
}
private Font printFont;
private Font titleFont;
private StringReader streamToPrint;
private int leftMargin = 0;
/// <summary>
/// 设置PrintDocument 的相关属性 调用打印机方法
/// </summary>
/// <param name="str">要打印的字符串</param>
public void print(string str)
{undefined
try
{undefined
//打印文字
streamToPrint = new StringReader(str);
printFont = new Font("宋体", 10);
titleFont = new Font("宋体", 15);
System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
//调用的打印机名
pd.PrinterSettings.PrinterName = "Hewlett-Packard HP LaserJet Pro MFP M126a";
pd.DocumentName = pd.PrinterSettings.MaximumCopies.ToString();
pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.pd_PrintPage);
// pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.MyPrintDocument_PrintPage);
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
pd.Print();
}
catch(Exception ex)
{undefined
MessageBox.Show(ex.ToString());
}
}
/// <summary>
/// 打印格式（字符串）
/// </summary>
/// <param name="sender"></param>
/// <param name="ev"></param>
private void pd_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs ev)
{undefined
float linesPerPage = 0;
float yPos = 0;
int count = 0;
float leftMargin = this.leftMargin;
float topMargin = 0;
String line = null;
linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics);
while (count < linesPerPage &&
((line = streamToPrint.ReadLine()) != null))
{undefined
if (count == 0)
{undefined
yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
ev.Graphics.DrawString(line, titleFont, Brushes.Black, leftMargin + 10, yPos, new StringFormat());
}
else
{undefined
yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
ev.Graphics.DrawString(line, printFont, Brushes.Black, leftMargin, yPos, new StringFormat());
}
count++;
}
if (line != null)
ev.HasMorePages = true;
else
ev.HasMorePages = false;
}
private void button1_Click(object sender, EventArgs e)
{undefined
//打印报表解决方案一：
string ss = "菜单";
//调用本地打印机成功：注意的问题的是打印机的名字和打印机的驱动安装
print("主题\n------------\n被冷冷地："+ss+"\n-------------\n说到了");
//获取本地打印机的名字
GetPrintName();
}
/// <summary>
/// 获取打印机的名字
/// </summary>
private void GetPrintName()
{undefined
//获取本地打印机的名字
PrintDocument print = new PrintDocument();
string sDefault = print.PrinterSettings.PrinterName;//默认打印机名
label1.Text = sDefault;
foreach (string sPrint in PrinterSettings.InstalledPrinters)//获取所有打印机名称
{undefined
listBox1.Items.Add(sPrint);
textBox1.Text += sPrint + "\n";
if (sPrint == sDefault)
listBox1.SelectedIndex = listBox1.Items.IndexOf(sPrint);
}
}
private void Form1_Load(object sender, EventArgs e)
{undefined
// TODO: 这行代码将数据加载到表“weijiaweiDataSet.xinxibiao”中。您可以根据需要移动或删除它。
// this.xinxibiaoTableAdapter.Fill(this.weijiaweiDataSet.xinxibiao);
this.reportViewer1.RefreshReport();
this.reportViewer1.RefreshReport();
}
private void button2_Click(object sender, EventArgs e)
{undefined
print2();
}
/// <summary>
/// 设置PrintDocument 的相关属性
/// </summary>
/// <param name="str">要打印的字符串</param>
public void print2()
{undefined
try
{undefined
// streamToPrint = new StringReader(str);
printFont = new Font("宋体", 10);
titleFont = new Font("宋体", 15);
System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
pd.PrinterSettings.PrinterName = "Hewlett-Packard HP LaserJet Pro MFP M126a";
pd.DocumentName = pd.PrinterSettings.MaximumCopies.ToString();
//pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.pd_PrintPage);
pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.MyPrintDocument_PrintPage);
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
pd.Print();
}
catch (Exception ex)
{undefined
MessageBox.Show(ex.ToString());
}
}
/// <summary>
/// 打印的格式
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MyPrintDocument_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{undefined
/*如果需要改变自己 可以在new Font(new FontFamily("黑体"),11）中的“黑体”改成自己要的字体就行了，黑体 后面的数字代表字体的大小
System.Drawing.Brushes.Blue , 170, 10 中的 System.Drawing.Brushes.Blue 为颜色，后面的为输出的位置 */
e.Graphics.DrawString("新乡市三月软件公司入库单", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 170, 10);
e.Graphics.DrawString("供货商:河南科技学院", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Blue, 10, 12);
//信息的名称
e.Graphics.DrawLine(Pens.Black, 8, 30, 480, 30);
e.Graphics.DrawString("入库单编号", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 9, 35);
e.Graphics.DrawString("商品名称", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 160, 35);
e.Graphics.DrawString("数量", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 260, 35);
e.Graphics.DrawString("单价", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 330, 35);
e.Graphics.DrawString("总金额", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 400, 35);
e.Graphics.DrawLine(Pens.Black, 8, 50, 480, 50);
//产品信息
e.Graphics.DrawString("R2011-01-2016:06:35", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 9, 55);
e.Graphics.DrawString("联想A460", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 160, 55);
e.Graphics.DrawString("100", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 260, 55);
e.Graphics.DrawString("200.00", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 330, 55);
e.Graphics.DrawString("20000.00", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 400, 55);
e.Graphics.DrawLine(Pens.Black, 8, 200, 480, 200);
e.Graphics.DrawString("地址：新乡市河南科技学院信息工程学院", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 9, 210);
e.Graphics.DrawString("经办人:任忌", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 220, 210);
e.Graphics.DrawString("服务热线:15083128577", new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 320, 210);
e.Graphics.DrawString("入库时间:" + DateTime.Now.ToString(), new Font(new FontFamily("黑体"), 8), System.Drawing.Brushes.Black, 9, 230);
}
private void button3_Click(object sender, EventArgs e)
{undefined
// printDocument1 为 打印控件
//设置打印用的纸张 当设置为Custom的时候，可以自定义纸张的大小，还可以选择A4,A5等常用纸型
//先注释和不注释来看取打印的内容 格式一测试失败
//格式一：
// this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custom", 500, 300);
//this.printDocument1.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
//格式二：
// this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custom", 500, 300);
// this.printDocument1.PrintPage += new PrintPageEventHandler(this.MyPrintDocument_PrintPage);
//格式：菜单
// this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custom", 300,500);
// this.printDocument1.PrintPage += new PrintPageEventHandler(this.Menu);
//打印图片
this.printDocument1.DefaultPageSettings.PaperSize = new PaperSize("Custom", 300, 500);
this.printDocument1.PrintPage += new PrintPageEventHandler(this.Image);
//将写好的格式给打印预览控件以便预览
printPreviewDialog1.Document = printDocument1;
//显示打印预览
DialogResult result = printPreviewDialog1.ShowDialog();
}
private void button4_Click(object sender, EventArgs e)
{undefined
print3();
}
/// <summary>
/// 设置PrintDocument 的相关属性
/// </summary>
/// <param name="str"></param>
public void print3()
{undefined
try
{undefined
/*
// streamToPrint = new StringReader(str);
printFont = new Font("宋体", 10);
titleFont = new Font("宋体", 15);
System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
pd.PrinterSettings.PrinterName = "Hewlett-Packard HP LaserJet Pro MFP M126a";
pd.DocumentName = pd.PrinterSettings.MaximumCopies.ToString();
//pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.pd_PrintPage);
pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.Menu);
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
pd.Print();
*/
//新建打印对象
System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
//打印机名字
pd.PrinterSettings.PrinterName = "Hewlett-Packard HP LaserJet Pro MFP M126a";
//打印文档显示的名字
pd.DocumentName = "订单";
//
//pd.PrinterSettings.MaximumCopies.ToString();
//打印的格式
pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.Menu);
//
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
//开始打印
pd.Print();
}
catch (Exception ex)
{undefined
MessageBox.Show(ex.ToString());
}
}
//绘图需要使用的数组 后期可以套用变量list
public string[] menu = { "菜一", "菜二","中级菜单" };
/// <summary>
/// 打印的格式:菜单
/// </summary>
/// <param name="sender">自定义报表（原理是绘图）</param>
/// <param name="e"></param>
private void Menu(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{undefined
//绘制（输出，文字格式（字体，大小），颜色，位置起始位置x，y轴坐标）
e.Graphics.DrawString("店名", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 138, 10);
//打印两个点的坐标（颜色，坐标1，坐标2）
e.Graphics.DrawLine(Pens.Black, 8, 30, 292, 30);
e.Graphics.DrawString("订单号：（）", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 10, 35);
e.Graphics.DrawString("编号", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 10, 55);
e.Graphics.DrawString("菜名", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 75, 55);
e.Graphics.DrawString("单价", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 150, 55);
e.Graphics.DrawString("数量", new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 200, 55);
int i = 0;
//循环输出变量
foreach (string element in menu)
{undefined
i=i+20;
e.Graphics.DrawString(element, new Font(new FontFamily("黑体"), 11), System.Drawing.Brushes.Black, 75, 80+i);
}
e.Graphics.DrawLine(Pens.Black, 8, 200, 292, 200);
}
private void button5_Click(object sender, EventArgs e)
{undefined
print4();
}
public void print4()
{undefined
try
{undefined
//新建打印对象
System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
//打印机名字
pd.PrinterSettings.PrinterName = "Hewlett-Packard HP LaserJet Pro MFP M126a";
//打印文档显示的名字
pd.DocumentName = "订单";
//
//pd.PrinterSettings.MaximumCopies.ToString();
//打印的格式
pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.Image);
//
pd.PrintController = new System.Drawing.Printing.StandardPrintController();
//开始打印
pd.Print();
}
catch (Exception ex)
{undefined
MessageBox.Show(ex.ToString());
}
}
/// <summary>
/// 打印的格式:图片
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Image(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{undefined
//直接调用图片对象绘制
e.Graphics.DrawImage(pictureBox1.Image, 20, 20);
}
private void button6_Click(object sender, EventArgs e)
{undefined
printDocument1.PrintController.OnEndPrint(printDocument1, new System.Drawing.Printing.PrintEventArgs());
}
}
}
```
这个实际还是要看什么打印机 支持哪些功能
打印机什么接口
先分析一下打印字符的格式，贴出来帮你看一下（需要对照一下打印内容和十六进制字符），没加密的话可以实现转换。