這篇文章主要介紹了asp.net(C#)生成Code39條形碼實例 條碼槍可以掃描出。需要的朋友可以過來參考下，希望對大家有所幫助
代碼如下: using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; namespace MSCL { /// <summary> /// 生成條碼Code39 /// </summary> public class Code39 { private Hashtable m_Code39 = new Hashtable(); private byte m_Magnify = 0; /// <summary> /// 放大倍數 /// </summary> public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } } private int m_Height = 40; /// <summary> /// 圖形高 /// </summary> public int Height { get { return m_Height; } set { m_Height = value; } } private Font m_ViewFont = null; /// <summary> /// 字體大小 /// </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> /// 基本類別 1234567890ABC /// </summary> Code39Normal, /// <summary> /// 全ASCII方式 +A+B 來表示小寫 /// </summary> Code39FullAscII } /// <summary> /// 獲得條碼圖形 /// </summary> /// <param name="p_Text">文字信息</param> /// <param name="p_Model">類別</param> /// <param name="p_StarChar">是否增加前後*號</param> /// <returns>圖形</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("帶有起始符號不能出現*"); 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> /// 繪制編碼圖形 /// </summary> /// <param name="p_Text">編碼</param> /// <returns>圖形</returns> private Bitmap GetImage(string p_Text) { char[] _Value = p_Text.ToCharArray(); //寬 == 需要繪制的數量*放大倍數 + 兩個字的寬 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> /// 繪制文字 /// </summary> /// <param name="p_CodeImage">圖形</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(); } } } 代碼如下: <%@ WebHandler Language="C#" Class="GetC39Handler" %> using System; using System.Web; using System.IO; using System.Drawing; using System.Drawing.Imaging; public class GetC39Handler : IHttpHandler { //獲取Code39處理程序 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; } } } 代碼如下: //調用顯示訂單條碼 Image1.ImageUrl = "GetC39Handler.ashx?OrderNo=32134411";
