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()         {             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";