asp.net生成code39条形码代码实例

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
 
namespace MSCL
{
/// <summary>
/// 生成条码Code39
/// </summary>
public class Code39
{
private Hashtable m_Code39 = new Hashtable();
 
private byte m_Magnify = 0;
/// <summary>
/// 放大倍数
/// </summary>
public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
 
private int m_Height = 40;
/// <summary>
/// 图形高
/// </summary>
public int Height { get { return m_Height; } set { m_Height = value; } }
 
private Font m_ViewFont = null;
/// <summary>
/// 字体大小
/// </summary>
public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }
public Code39()
{  www.jb200.com
    m_Code39.Add("A", "1101010010110");
    m_Code39.Add("B", "1011010010110");
    m_Code39.Add("C", "1101101001010");
    m_Code39.Add("D", "1010110010110");
    m_Code39.Add("E", "1101011001010");
    m_Code39.Add("F", "1011011001010");
    m_Code39.Add("G", "1010100110110");
    m_Code39.Add("H", "1101010011010");
    m_Code39.Add("I", "1011010011010");
    m_Code39.Add("J", "1010110011010");
    m_Code39.Add("K", "1101010100110");
    m_Code39.Add("L", "1011010100110");
    m_Code39.Add("M", "1101101010010");
    m_Code39.Add("N", "1010110100110");
    m_Code39.Add("O", "1101011010010");
    m_Code39.Add("P", "1011011010010");
    m_Code39.Add("Q", "1010101100110");
    m_Code39.Add("R", "1101010110010");
    m_Code39.Add("S", "1011010110010");
    m_Code39.Add("T", "1010110110010");
    m_Code39.Add("U", "1100101010110");
    m_Code39.Add("V", "1001101010110");
    m_Code39.Add("W", "1100110101010");
    m_Code39.Add("X", "1001011010110");
    m_Code39.Add("Y", "1100101101010");
    m_Code39.Add("Z", "1001101101010");
    m_Code39.Add("0", "1010011011010");
    m_Code39.Add("1", "1101001010110");
    m_Code39.Add("2", "1011001010110");
    m_Code39.Add("3", "1101100101010");
    m_Code39.Add("4", "1010011010110");
    m_Code39.Add("5", "1101001101010");
    m_Code39.Add("6", "1011001101010");
    m_Code39.Add("7", "1010010110110");
    m_Code39.Add("8", "1101001011010");
    m_Code39.Add("9", "1011001011010");
    m_Code39.Add("+", "1001010010010");
    m_Code39.Add("-", "1001010110110");
    m_Code39.Add("*", "1001011011010");
    m_Code39.Add("/", "1001001010010");
    m_Code39.Add("%", "1010010010010");
    //m_Code39.Add("contentquot;, "1001001001010");
    m_Code39.Add(".", "1100101011010");
    m_Code39.Add(" ", "1001101011010");
}
 
public enum Code39Model
{
    /// <summary>
    /// 基本类别 1234567890ABC
    /// </summary>
    Code39Normal,
    /// <summary>
    /// 全ASCII方式 +A+B 来表示小写
    /// </summary>
    Code39FullAscII
}
/// <summary>
/// 获得条码图形
/// </summary>
/// <param name="p_Text">文字信息</param>
/// <param name="p_Model">类别</param>
/// <param name="p_StarChar">是否增加前后*号</param>
/// <returns>图形</returns>
public Bitmap GetCodeImage(string p_Text, Code39Model p_Model, bool p_StarChar)
{
    string _ValueText = "";
    string _CodeText = "";
    char[] _ValueChar = null;
    switch (p_Model)
    {
case Code39Model.Code39Normal:
    _ValueText = p_Text.ToUpper();
    break;
default:
    _ValueChar = p_Text.ToCharArray();
    for (int i = 0; i != _ValueChar.Length; i++)
    {
if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i] <= 122)
{
    _ValueText += "+" + _ValueChar[i].ToString().ToUpper();
 
}
else
{
    _ValueText += _ValueChar[i].ToString();
}
    }
    break;
    }
 
    _ValueChar = _ValueText.ToCharArray();
 
    if (p_StarChar == true) _CodeText += m_Code39["*"];
 
    for (int i = 0; i != _ValueChar.Length; i++)
    {
if (p_StarChar == true && _ValueChar[i] == '*') throw new Exception("带有起始符号不能出现*");
 
object _CharCode = m_Code39[_ValueChar[i].ToString()];
if (_CharCode == null) throw new Exception("不可用的字符" + _ValueChar[i].ToString());
_CodeText += _CharCode.ToString();
    }
 
    if (p_StarChar == true) _CodeText += m_Code39["*"];
 
    Bitmap _CodeBmp = GetImage(_CodeText);
    GetViewImage(_CodeBmp, p_Text);
    return _CodeBmp;
}
/// <summary>
/// 绘制编码图形
/// </summary>
/// <param name="p_Text">编码</param>
/// <returns>图形</returns>
private Bitmap GetImage(string p_Text)
{
    char[] _Value = p_Text.ToCharArray();
 
    //宽 == 需要绘制的数量*放大倍数 + 两个字的宽  
    Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1), (int)m_Height);
    Graphics _Garphics = Graphics.FromImage(_CodeImage);
 
    _Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));
 
    int _LenEx = 0;
    for (int i = 0; i != _Value.Length; i++)
    {
int _DrawWidth = m_Magnify + 1;
if (_Value[i] == '1')
{
    _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
 
}
else
{
    _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
}
_LenEx += _DrawWidth;
}
 
 _Garphics.Dispose();
return _CodeImage;
}
/// <summary>
/// 绘制文字
/// </summary>
/// <param name="p_CodeImage">图形</param>
/// <param name="p_Text">文字</param>
private void GetViewImage(Bitmap p_CodeImage, string p_Text)
{
    if (m_ViewFont == null) return;
    Graphics _Graphics = Graphics.FromImage(p_CodeImage);
    SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);
 
    if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height - 20)
    {
_Graphics.Dispose();
return;
    }
    int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height;
 
    _Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));
 
    int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;
 
    _Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);
 
    _Graphics.Dispose();
 
}
    }
 
}
 
<%@ WebHandler Language="C#" Class="GetC39Handler" %>
using System;
using System.Web;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
 
public class GetC39Handler : IHttpHandler {
//获取Code39处理程序
public void ProcessRequest (HttpContext context) {
string OrderNo = context.Request.Params["OrderNo"];
MSCL.Code39 _Code39 = new MSCL.Code39();
_Code39.Height = 60;
_Code39.Magnify = 0;
_Code39.ViewFont = new Font("Arial", 12);
System.Drawing.Image _CodeImage = _Code39.GetCodeImage(OrderNo, MSCL.Code39.Code39Model.Code39Normal, true);
System.IO.MemoryStream _Stream = new System.IO.MemoryStream();
_CodeImage.Save(_Stream, System.Drawing.Imaging.ImageFormat.Jpeg);
//_CodeImage.Save(Server.MapPath("/1.jpeg"));
//_CodeImage.Save(Server.MapPath("/1.BMP"));
//_CodeImage.Save(Server.MapPath("/1.GIF"));
 
context.Response.ContentType = "image/tiff";
context.Response.Clear();
context.Response.BufferOutput = true;
context.Response.BinaryWrite(_Stream.GetBuffer());
context.Response.Flush();
    }   
    public bool IsReusable {
get {
    return false;
}
    }
}

//调用显示订单条码
Image1.ImageUrl = "GetC39Handler.ashx?OrderNo=32134411";