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史上最简洁C# 生成条形码图片思路及示例分享

周睿范
2023-03-14
本文向大家介绍史上最简洁C# 生成条形码图片思路及示例分享,包括了史上最简洁C# 生成条形码图片思路及示例分享的使用技巧和注意事项,需要的朋友参考一下

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:


  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


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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