史上最简洁C# 生成条形码图片思路及示例分享

前端技术 2023/09/09 C#

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：

　　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, font, Brushes.Black, 0, 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\", 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, intFontSize);
            //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, font, Brushes.Black, 0, 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();
        }
        #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, 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,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, 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();
        }
        #endregion
    }
}

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