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史上最简洁C# 生成条形码图片思路及示例分享

发布时间：2020-12-15 03:50:18 所属栏目：百科 来源：网络整理
导读：在网上看到一些人写关于条形码的代码都很长，有的甚至拿来卖，所以查了下资料，希望能对大家有帮助。 我的实现原理是： 其实Windows本身就有一个字体是用来显示条形码的。 只要将数字改为这种字体就变成了条形码。 windows字体库下，有如下八种字体可以用来

在网上看到一些人写关于条形码的代码都很长，有的甚至拿来卖，所以查了下资料，希望能对大家有帮助。

　　我的实现原理是：

　　其实Windows本身就有一个字体是用来显示条形码的。

　　只要将数字改为这种字体就变成了条形码。

　　windows字体库下，有如下八种字体可以用来将数字转换成条形码：

复制代码 代码如下:

　　Code39AzaleaNarrow1
　　Code39AzaleaNarrow2
　　Code39AzaleaNarrow3
　　Code39AzaleaRegular1
　　Code39AzaleaRegular2
　　Code39AzaleaWide1
　　Code39AzaleaWide2
　　Code39AzaleaWide3

　　把代码贴给大家参考：

复制代码 代码如下:

　　Bitmap b=new Bitmap(200,200);
　　Graphics g = Graphics.FromImage(b);
　　Font font = new Font("Code39AzaleaRegular2",32);
　　g.DrawString("123456",font,Brushes.Black,new PointF(100,100)); 
　　pictureBox1.BackgroundImage = b;
　　pictureBox1.BackgroundImageLayout = ImageLayout.Zoom。

是不是很简单呢，亲们，思路给大家了，具体使用到项目中的时候，小伙伴们自己扩展下就可以了。

另附上一则示例中的应用

复制代码 代码如下:

using System;
using System.Collections.Generic;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.Drawing.Design;
using System.IO;
using System.Collections;
namespace Public.Equipment
{
    /// <summary>
    ///绘制条形码
    /// </summary>
    public class DrawingBarCode
    {
        public DrawingBarCode()
        {
            //
            //TODO: 在此处添加构造函数逻辑
            //
        }
        #region 根据字体产生条形码
        /// <summary>
        /// 根据条形码绘制图片
        /// </summary>
        /// <param name="strNumber">条形码</param>
        public void DrawingBarCode(string strNumber)
        {
            PrivateFontCollection fonts = new PrivateFontCollection();
            //39带数字
            //fonts.AddFontFile(HttpContext.Current.Server.MapPath(".") + "/BarCodeFonts/V100010_.TTF");
            //FontFamily ff = new FontFamily("C39HrP48DlTt",fonts);
            //39码
            strNumber = "*" + strNumber + "*";
            fonts.AddFontFile(HttpContext.Current.Server.MapPath(".") + "/BarCodeFonts/FREE3OF9X.TTF");
            FontFamily ff = new FontFamily("Free 3 of 9 Extended",fonts);
            //接近条形码
            //fonts.AddFontFile(HttpContext.Current.Server.MapPath(".") + "/BarCodeFonts/V100014_.TTF");
            //FontFamily ff = new FontFamily("C39P24DlTt",fonts);
            Font font = new Font(ff,12);
            //设置图片大小
            Image img = new Bitmap(1,1);
            Graphics g = Graphics.FromImage(img);
            SizeF fontSize = g.MeasureString(strNumber,font);
            int intWidth = Convert.ToInt32(fontSize.Width);
            int intHeight = Convert.ToInt32(fontSize.Height);
            g.Dispose();
            img.Dispose();
            img = new Bitmap(intWidth,intHeight);
            g = Graphics.FromImage(img);
            g.Clear(Color.White);
            g.CompositingQuality = CompositingQuality.HighQuality;
            g.SmoothingMode = SmoothingMode.HighQuality;
            g.DrawString(strNumber,0);
            MemoryStream stream = new MemoryStream();
            img.Save(stream,ImageFormat.Jpeg);
            HttpContext.Current.Response.ClearContent();
            HttpContext.Current.Response.ContentType = "image/Jpeg";
            HttpContext.Current.Response.BinaryWrite(stream.ToArray());
            g.Dispose();
            img.Dispose();
        }
        /// <summary>
        /// 根据条形码绘制图片
        /// </summary>
        /// <param name="strNumber">条形码</param>
        /// <param name="intFontSize">字体大小</param>
        public void DrawingBarCode(string strNumber,int intFontSize)
        {
            PrivateFontCollection fonts = new PrivateFontCollection();
            //39带数字
            //fonts.AddFontFile(HttpContext.Current.Server.MapPath(".") + "/BarCodeFonts/V100010_.TTF");
            //FontFamily ff = new FontFamily("C39HrP48DlTt",fonts);
            //39码
             strNumber = "*" + strNumber + "*";
            fonts.AddFontFile(HttpContext.Current.Server.MapPath(".") + "/BarCodeFonts/FREE3OF9X.TTF");
            FontFamily ff = new FontFamily("Free 3 of 9 Extended",intFontSize);
            //设置图片大小
            Image img = new Bitmap(1,ImageFormat.Jpeg);
            HttpContext.Current.Response.ClearContent();
            HttpContext.Current.Response.ContentType = "image/Jpeg";
            HttpContext.Current.Response.BinaryWrite(stream.ToArray());
            g.Dispose();
            img.Dispose();
        }
        #endregion
        #region 绘制Code39码
        /// <summary>
        /// 根据条形码绘制图片
        /// </summary>
        /// <param name="strNumber">条形码</param>
        public void DrawingBarCode39(string strNumber,int intFontSize,bool WithStart)
        {
            ViewFont = new Font("宋体",intFontSize);
            Image img = GetCodeImage(strNumber,Code39Model.Code39Normal,WithStart);
            MemoryStream stream = new MemoryStream();
            img.Save(stream,ImageFormat.Jpeg);
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.ClearContent();
            HttpContext.Current.Response.BufferOutput = true;
            HttpContext.Current.Response.ContentType = "image/Jpeg";
            HttpContext.Current.Response.BinaryWrite(stream.GetBuffer());
            HttpContext.Current.Response.Flush();
        }
        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; } }
        /**
         Code39码的编码规则是：
           1、 每五条线表示一个字符；
           2、 粗线表示1，细线表示0；
           3、 线条间的间隙宽的表示1，窄的表示0；
           4、 五条线加上它们之间的四条间隙就是九位二进制编码，而且这九位中必定有三位是1，所以称为39码；
           5、 条形码的首尾各一个＊标识开始和结束
         */
        public DrawingBarCode(Boolean IsCode39)
        {
            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("$","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,_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,_DrawWidth,m_Height));
                }
                else
                {
                    _Garphics.FillRectangle(Brushes.White,m_Height));
                }
                _LenEx += _DrawWidth;
            }
            _Garphics.Dispose();
            return _CodeImage;
        }
        /// <summary>
        /// 绘制文字,文字宽度大于图片宽度将不显示
        /// </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,_StarHeight,p_CodeImage.Width,(int)_FontSize.Height));
            int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;
            _Graphics.DrawString(p_Text,m_ViewFont,_StarWidth,_StarHeight);
            _Graphics.Dispose();
        }
        #endregion
    }
}

（编辑：李大同）

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