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using System.Security.Cryptography;using    System.IO;  using    System.Text; ///MD5加密  public string MD5Encrypt(string    pToEncrypt,  string    sKey)    {       DESCryptoServiceProvider    des  =  new    DESCryptoServiceProvider();     byte[]    inputByteArray  =    Encoding.Default.GetBytes(pToEncrypt);       des.Key  =    ASCIIEncoding.ASCII.GetBytes(sKey);       des.IV  =    ASCIIEncoding.ASCII.GetBytes(sKey);       MemoryStream    ms  =  new    MemoryStream();       CryptoStream    cs  =  new    CryptoStream(ms,    des.CreateEncryptor(),CryptoStreamMode.Write);       cs.Write(inputByteArray,  0,    inputByteArray.Length);       cs.FlushFinalBlock();       StringBuilder    ret  =  new    StringBuilder();     foreach(byte    b  in    ms.ToArray())       {        ret.AppendFormat("{0:X2}",    b);       }       ret.ToString();     return    ret.ToString();      }  ///MD5解密  public string MD5Decrypt(string    pToDecrypt,  string    sKey)    {      DESCryptoServiceProvider    des  =  new    DESCryptoServiceProvider();     byte[]    inputByteArray  =  new  byte[pToDecrypt.Length  /  2];     for(int    x  =  0;    x  <    pToDecrypt.Length  /  2;    x )       {      int    i  =    (Convert.ToInt32(pToDecrypt.Substring(x  *  2,  2),  16));        inputByteArray[x]  =    (byte)i;       }       des.Key  =    ASCIIEncoding.ASCII.GetBytes(sKey);       des.IV  =    ASCIIEncoding.ASCII.GetBytes(sKey);       MemoryStream    ms  =  new    MemoryStream();       CryptoStream    cs  =  new    CryptoStream(ms,    des.CreateDecryptor(),CryptoStreamMode.Write);       cs.Write(inputByteArray,  0,    inputByteArray.Length);       cs.FlushFinalBlock();       StringBuilder    ret  =  new    StringBuilder();                  return    System.Text.Encoding.Default.GetString(ms.ToArray());      }

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套打Demo 【核心代码】using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Drawing.Printing;namespace Print_Demo{ public partial class Form1 : Form { public PrintDocument printDt = new PrintDocument(); //打印文档对象 Font printFont; //打印使用的字体 public Form1() { InitializeComponent(); } void printDt_PrintPage(object sender, PrintPageEventArgs e) { float pointX = 10; float pointY = 10; e.Graphics.DrawString("打印内容", new Font("宋体", 16F), Brushes.Black, pointX 60, pointY); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 26,pointX 300,pointY 26); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 35); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 56, pointX 300, pointY 56); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 65); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 86, pointX 300, pointY 86); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 95); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 116, pointX 300, pointY 116); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 125); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 146, pointX 300, pointY 146); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 155); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 176, pointX 300, pointY 176); e.Graphics.DrawString("打印内容", printFont, Brushes.Black, pointX, pointY 185); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 206, pointX 300, pointY 206); e.Graphics.DrawString("检测结果", printFont, Brushes.Black, pointX, pointY 233); e.Graphics.DrawString("通过", new Font("宋体",22F,FontStyle.Bold), Brushes.Black, pointX 90, pointY 225); e.Graphics.DrawLine(new Pen(Color.Black), pointX, pointY 265, pointX 300, pointY 265); e.Graphics.DrawString("单位名称", printFont, Brushes.Black, pointX, pointY 275); } private void Form1_Load(object sender, EventArgs e) { printDt.PrintPage = new PrintPageEventHandler(printDt_PrintPage); printFont = new Font("宋体", 12F); } private void btnPrint_Click(object sender, EventArgs e) { //PrintDialog printDlg = new PrintDialog(); //printDlg.Document = printDt; //printDlg.AllowPrintToFile = true; //printDlg.AllowCurrentPage = true; //printDlg.AllowSelection = true; //printDlg.ShowDialog(); //printDlg.ShowDialog(); printDt.Print(); } private void btnLook_Click(object sender, EventArgs e) { PrintPreviewDialog printPreview = new PrintPreviewDialog(); printPreview.PrintPreviewControl.Document = printDt; printPreview.ShowDialog(this); } }}

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