C#生成Code39(extend)条形码【非条形码字体】

简介

Code39是条形码的一种。由于编制简单、能够对任意长度的数据进行编码、支持设备广泛等特性而被广泛采用。

1. 能够对任意长度的数据进行编码。其局限在于印刷品的长度和条码阅读器的识别范围。
2. 支持设备广泛。目前几乎所有的条形码阅读设备都能阅读Code39码，打印机也是同样情况。
3. 编制简单。简单的开发技术就能快速生成相应的编码图像。
4. 一般Code39码由5条线和分开它们的4条缝隙共9个元素构成。线和缝隙有宽窄之分，而且无论线还是缝隙仅有3个比其他的元素要宽一定比例。39码因此得名

Code39条形码规则

Code39有效字符

Code 39只接受如下43个有效输入字符：

• 1、26个大写字母（A – Z），
• 2、十个数字（0 – 9），
• 3、连接号(-),句号（.）,空格,美圆符号($),斜扛(/),加号(+)以及百分号(%)。
• 4、其余的输入将被忽略。
• 5、code39通常情况下不需要校验码。但是对於精确度要求高的应用，需要在code39条形码後面增加一个校验码。

条形码的生成网上也有很多库文件，做的特别好的都是商业授权。一维码二维码在.net开源项目中的生成读取比较知名的有:Zxing.net(http://zxingnet.codeplex.com/)、BarcodeLib等。但有些时候开源软件所实现的并不满足当下的需求，所以还要做一些其他尝试。效果如下图：

代码实现如下

/// <summary>
/// Code39一维码生成类
/// </summary>
public class CSharpCode39
{
 
    #region 数据码
    private byte[,] c39_bp = new byte[,] { 
        { 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x31, 0x30, 0x30 }, { 0x31, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31 }, { 0x32, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31 }, { 0x33, 0x31, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30 }, { 0x34, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x31 }, { 0x35, 0x31, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30 }, { 0x36, 0x30, 0x30, 0x31, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30 }, { 0x37, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x31 }, { 0x38, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30 }, { 0x39, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30 }, { 0x41, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31 }, { 0x42, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31 }, { 0x43, 0x31, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30 }, { 0x44, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x31 }, { 0x45, 0x31, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30 }, { 70, 0x30, 0x30, 0x31, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30 }, 
        { 0x47, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x31 }, { 0x48, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30 }, { 0x49, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x31, 0x30, 0x30 }, { 0x4a, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x31, 0x30, 0x30 }, { 0x4b, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31 }, { 0x4c, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31 }, { 0x4d, 0x31, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30 }, { 0x4e, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x31 }, { 0x4f, 0x31, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30 }, { 80, 0x30, 0x30, 0x31, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30 }, { 0x51, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x31 }, { 0x52, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30 }, { 0x53, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30, 0x31, 0x31, 0x30 }, { 0x54, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30, 0x31, 0x31, 0x30 }, { 0x55, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31 }, { 0x56, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x31 }, 
        { 0x57, 0x31, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30 }, { 0x58, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30, 0x31 }, { 0x59, 0x31, 0x31, 0x30, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30 }, { 90, 0x30, 0x31, 0x31, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30 }, { 0x2d, 0x30, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30, 0x31 }, { 0x2e, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30 }, { 0x20, 0x30, 0x31, 0x31, 0x30, 0x30, 0x30, 0x31, 0x30, 0x30 }, { 0x2a, 0x30, 0x31, 0x30, 0x30, 0x31, 0x30, 0x31, 0x30, 0x30 }, { 0x24, 0x30, 0x31, 0x30, 0x31, 0x30, 0x31, 0x30, 0x30, 0x30 }, { 0x2f, 0x30, 0x31, 0x30, 0x31, 0x30, 0x30, 0x30, 0x31, 0x30 }, { 0x2b, 0x30, 0x31, 0x30, 0x30, 0x30, 0x31, 0x30, 0x31, 0x30 }, { 0x25, 0x30, 0x30, 0x30, 0x31, 0x30, 0x31, 0x30, 0x31, 0x30 }
     };
    //code39合法字符集 [0-9A-Z+-*/%. ] 共43个
    private byte[] c39_cw = new byte[] { 
        0x30, 0x31, 50, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 0x45, 70, 
        0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 80, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 
        0x57, 0x58, 0x59, 90, 0x2d, 0x2e, 0x20, 0x24, 0x2f, 0x2b, 0x25
     };
    private byte[,] c39_ex = new byte[,] { 
        { 1, 0x24, 0x41 }, { 2, 0x24, 0x42 }, { 3, 0x24, 0x43 }, { 4, 0x24, 0x44 }, { 5, 0x24, 0x45 }, { 6, 0x24, 70 }, { 7, 0x24, 0x47 }, { 8, 0x24, 0x48 }, { 9, 0x24, 0x49 }, { 10, 0x24, 0x4a }, { 11, 0x24, 0x4b }, { 12, 0x24, 0x4c }, { 13, 0x24, 0x4d }, { 14, 0x24, 0x4e }, { 15, 0x24, 0x4f }, { 0x10, 0x24, 80 }, 
        { 0x11, 0x24, 0x51 }, { 0x12, 0x24, 0x52 }, { 0x13, 0x24, 0x53 }, { 20, 0x24, 0x54 }, { 0x15, 0x24, 0x55 }, { 0x16, 0x24, 0x56 }, { 0x17, 0x24, 0x57 }, { 0x18, 0x24, 0x58 }, { 0x19, 0x24, 0x59 }, { 0x1a, 0x24, 90 }, { 0x1b, 0x25, 0x41 }, { 0x1c, 0x25, 0x42 }, { 0x1d, 0x25, 0x43 }, { 30, 0x25, 0x44 }, { 0x1f, 0x25, 0x45 }, { 0x3b, 0x25, 70 }, 
        { 60, 0x25, 0x47 }, { 0x3d, 0x25, 0x48 }, { 0x3e, 0x25, 0x49 }, { 0x3f, 0x25, 0x4a }, { 0x5b, 0x25, 0x4b }, { 0x5c, 0x25, 0x4c }, { 0x5d, 0x25, 0x4d }, { 0x5e, 0x25, 0x4e }, { 0x5f, 0x25, 0x4f }, { 0x7b, 0x25, 80 }, { 0x7c, 0x25, 0x51 }, { 0x7d, 0x25, 0x52 }, { 0x7e, 0x25, 0x53 }, { 0x7f, 0x25, 0x54 }, { 0, 0x25, 0x55 }, { 0x40, 0x25, 0x56 }, 
        { 0x60, 0x25, 0x57 }, { 0x21, 0x2f, 0x41 }, { 0x22, 0x2f, 0x42 }, { 0x23, 0x2f, 0x43 }, { 0x26, 0x2f, 70 }, { 0x27, 0x2f, 0x47 }, { 40, 0x2f, 0x48 }, { 0x29, 0x2f, 0x49 }, { 0x2a, 0x2f, 0x4a }, { 0x2c, 0x2f, 0x4c }, { 0x3a, 0x2f, 90 }, { 0x61, 0x2b, 0x41 }, { 0x62, 0x2b, 0x42 }, { 0x63, 0x2b, 0x43 }, { 100, 0x2b, 0x44 }, { 0x65, 0x2b, 0x45 }, 
        { 0x66, 0x2b, 70 }, { 0x67, 0x2b, 0x47 }, { 0x68, 0x2b, 0x48 }, { 0x69, 0x2b, 0x49 }, { 0x6a, 0x2b, 0x4a }, { 0x6b, 0x2b, 0x4b }, { 0x6c, 0x2b, 0x4c }, { 0x6d, 0x2b, 0x4d }, { 110, 0x2b, 0x4e }, { 0x6f, 0x2b, 0x4f }, { 0x70, 0x2b, 80 }, { 0x71, 0x2b, 0x51 }, { 0x72, 0x2b, 0x52 }, { 0x73, 0x2b, 0x53 }, { 0x74, 0x2b, 0x54 }, { 0x75, 0x2b, 0x55 }, 
        { 0x76, 0x2b, 0x56 }, { 0x77, 0x2b, 0x57 }, { 120, 0x2b, 0x58 }, { 0x79, 0x2b, 0x59 }, { 0x7a, 0x2b, 90 }
     };
    #endregion
    #region 字段和属性
 
 
 
    private bool _checksum;
    private string _dataToEncode;
    private bool _humanReadable;
    private string _humanReadableFont;
    private float _humanReadableSize;
    private float _marginX;
    private float _marginY;
    private float _moduleHeight;
    private float _moduleWidth;
    private float _ratio;
    private float _reduction;
    private Color _codeBarColor = Color.Black;
    private bool _isDisplayCheckCode;
    private string _checkData;
    private bool _isDisplayStartStopSign;
    /// <summary>
    /// 是否检查效验
    /// </summary>
    public bool Checksum
    {
        get
        {
            return _checksum;
        }
        set
        {
            _checksum = value;
        }
    }
 
 
    /// <summary>
    /// 要进行编码的数据
    /// </summary>
    public string DataToEncode
    {
        get
        {
            return _dataToEncode;
        }
        set
        {
            _dataToEncode = value;
        }
    }
 
 
 
    /// <summary>
    /// 是否显示文本内容
    /// </summary>
    public bool HumanReadable
    {
        get
        {
            return _humanReadable;
        }
        set
        {
            _humanReadable = value;
        }
    }
    /// <summary>
    /// 用于显示文本内容的字体
    /// </summary>
    public string HumanReadableFont
    {
        get
        {
            return _humanReadableFont;
        }
        set
        {
            _humanReadableFont = value;
        }
    }
    /// <summary>
    /// 用于显示文本内容文字的代大小 
    /// </summary>
    public float HumanReadableSize
    {
        get
        {
            return _humanReadableSize;
        }
        set
        {
            _humanReadableSize = value;
        }
    }
 
    /// <summary>
    /// 水平方向边距
    /// 水平方向建议尽量留白
    /// 如果没有留白同时模块宽度较小可能会造成无法识别
    /// </summary>
    public float MarginX
    {
        get
        {
            return _marginX;
        }
        set
        {
            _marginX = value;
        }
    }
    /// <summary>
    /// 垂直方向边距
    /// </summary>
    public float MarginY
    {
        get
        {
            return _marginY;
        }
        set
        {
            _marginY = value;
        }
    }
 
    /// <summary>
    /// 模块高度(mm)
    /// </summary>
    public float ModuleHeight
    {
        get
        {
            return _moduleHeight;
        }
        set
        {
            _moduleHeight = value;
        }
    }
 
    /// <summary>
    /// 模块宽度(mm)
    /// 模块宽度不应低于0.2646f
    /// 模块宽度过低会造成数据丢失因而读不出数据或者会误读
    /// </summary>
    public float ModuleWidth
    {
        get
        {
            return _moduleWidth;
        }
        set
        {
            _moduleWidth = value;
        }
    }
 
 
    /// <summary>
    /// 放大比率 
    /// </summary>
    public float Ratio
    {
        get
        {
            return _ratio;
        }
        set
        {
            _ratio = value;
        }
    }
    /// <summary>
    /// 缩小
    /// </summary>
    public float Reduction
    {
        get
        {
            return _reduction;
        }
        set
        {
            _reduction = value;
        }
    }
    /// <summary>
    /// 设置条形码的颜色
    /// </summary>
    public Color CodeBarColor
    {
        get
        {
            return _codeBarColor;
        }
        set
        {
            _codeBarColor = value;
        }
    }
 
    /// <summary>
    /// 是否显示效验码
    /// 此属性要在Checksum属性为true的情况下有用
    /// </summary>
    public bool IsDisplayCheckCode
    {
        get { return this._isDisplayCheckCode; }
        set { this._isDisplayCheckCode = value; }
    }
    /// <summary>
    /// 供人识别是否显示起止符
    /// </summary>
    public bool IsDisplayStartStopSign
    {
        get { return this._isDisplayStartStopSign; }
        set { this._isDisplayStartStopSign = value; }
    }
    #endregion
    /// <summary>
    /// 默认构造函数
    /// 初始化
    /// </summary>
    public CSharpCode39()
    {
        this.initData();
         
    }
    public CSharpCode39(string dataToEncode)
    {
        this.initData();
        this._dataToEncode = dataToEncode;
    }
    /// <summary>
    /// 默认构造函数
    /// 初始化数据
    /// </summary>
    private void initData()
    {
        this._humanReadableFont = "Arial";
        this._humanReadableSize = 10f;
        this._codeBarColor = Color.Black;
        this._moduleHeight = 15f;//模块高度毫米
        this._moduleWidth = 0.35f;//模块宽度毫米
        this._ratio = 3f;
        this._marginX =2;
        this._marginY =2;
        this._checksum = true;
        this._isDisplayCheckCode = false;
        this._isDisplayStartStopSign = false;
    }
    private char[] _bitpattern_c39(string rawdata, ref int finalLength)
    {
        //0x27  39  
        //0x50  80
        if ((rawdata.Length == 0) || (rawdata.Length > 0x50 /*0x27*/))
        {
            return null;
        }
        for (int i = 0; i < rawdata.Length; i++)
        {
            if ((rawdata[i] == '\0') || (rawdata[i] > '\x007f'))
            {
                return null;
            }
        }
        byte[] data = processTilde(rawdata);
        if (data.Length == 0)
        {
            return null;
        }
        byte[] buffer2 = this.processExtended(data);
        if ((buffer2.Length == 0) || (buffer2.Length > /*40*/80))
        {
            return null;
        }
        finalLength = this._checksum ? ((buffer2.Length + 2) + 1) : (buffer2.Length + 2);
        return this.getPattern_c39(buffer2);
    }
 
 
    /// <summary>
    /// 计算效验值
    /// </summary>
    /// <param name="data"></param>
    /// <param name="len"></param>
    /// <returns></returns>
    private byte _checksum_c39(byte[] data, int len)
    {
        //0x2b 43
        //字符值的总和除以合法字符集的个数43 取余数   余数在合法字符数组中对应的数值就是效验值
        int num2 = 0;
        for (int i = 1; i < len; i++)
        {
            num2 += this.valueFromCharacter(data[i]);
        }
        return this.c39_cw[num2 % 0x2b];
    }
 
    private char[] Code39_bitpattern(string dataToEncode)
    {
        int finalLength = 0;
        return this._bitpattern_c39(dataToEncode, ref finalLength);
    }
    /// <summary>
    /// 获得Code39条码图片
    /// </summary>
    /// <param name="resolution">DPI</param>
    /// <returns></returns>
    public Bitmap getBitmapImage(float resolution)
    {
       return Code39_createCode(resolution);
    }
    
    private Bitmap Code39_createCode(float resolution)
    {
        int num6;
        int finalLength = 0;
        char[] chArray = this._bitpattern_c39(DataToEncode, ref finalLength);
        if (chArray == null)
        {
            return null;
        }
        float fontsize = this._humanReadable ? (0.3527778f * this._humanReadableSize) : 0f;
        // float num3 = (7f * ModuleWidth) + ((3f * Ratio) * ModuleWidth);
        float num3 = (7f * this._moduleWidth) + ((3f * this._ratio) * this._moduleWidth);
        float width = (finalLength * num3) + (2f * this._marginX);
        float height = (this._moduleHeight + (2f * this._marginY)) + fontsize;
        width *= resolution / 25.4f;
        height *= resolution / 25.4f;
        Bitmap image = new Bitmap((int)width, (int)height, PixelFormat.Format32bppPArgb);
        image.SetResolution(resolution, resolution);
        //image.SetResolution(300, 300);
        Graphics g = Graphics.FromImage(image);
        g.Clear(Color.White);
        g.PageUnit = GraphicsUnit.Millimeter; //以毫米为度量单位
        g.FillRectangle(new SolidBrush(Color.White), new Rectangle(0, 0, /*(int)width*/image.Width, /*(int)height*/image.Height));
        //new Pen(Color.Black, 2f);
        //new SolidBrush(Color.White);
        SolidBrush brush = new SolidBrush(Color.Black);
        if (resolution < 300f)
        {
            //g.TextRenderingHint = TextRenderingHint.AntiAlias;
            //g.SmoothingMode = SmoothingMode.AntiAlias;
            g.CompositingQuality = CompositingQuality.HighQuality;
            //g.SmoothingMode = SmoothingMode.HighQuality;
            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
            g.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
        }
        float num7 = 0f;
        for (num6 = 0; num6 < chArray.Length; num6++)
        {
            if (chArray[num6] == '0')
            {
                if ((num6 &amp; 1) != 1)
                {
                    RectangleF rect = new RectangleF(MarginX + num7, MarginY, ModuleWidth, ModuleHeight);
                    MakeBar(g, rect, Reduction);
                }
                num7 += 1f * ModuleWidth;
            }
            else
            {
                if ((num6 &amp; 1) != 1)
                {
                    RectangleF ef2 = new RectangleF(MarginX + num7, MarginY, Ratio * ModuleWidth, ModuleHeight);
                    MakeBar(g, ef2, Reduction);
                }
                num7 += Ratio * ModuleWidth;
            }
        }
 
        #region  供人识别内容
        if (this._humanReadable)
        {
            #region 保留
            /*byte[] buffer2 = processTilde(this._dataToEncode);
            int index = 0;
            List<byte> arr = new List<byte>();
            for (num6 = 0; num6 < buffer2.Length; num6++)
            {
                //0x20 32      0x7e  126
                if ((buffer2[num6] >= 0x20) &amp;&amp; (buffer2[num6] <= 0x7e))
                {
                    arr.Add(buffer2[num6]);
                }
            }
            byte[] bytes = new byte[arr.Count];
            for (int i = 0; i < arr.Count; i++)
            {
                bytes[i] = arr[i];
            }
            index = arr.Count;
             
            //string text = new ASCIIEncoding().GetString(bytes, 0, index);
             */
            #endregion
            string text = this._dataToEncode;
            if (this._isDisplayCheckCode&amp;&amp;!string.IsNullOrEmpty(this._checkData)) {
                text += this._checkData;
            }
            if (this._isDisplayStartStopSign)
            {
                text = "*" + text + "*";
            }
            Font font = new Font(this._humanReadableFont, this._humanReadableSize);
            //g.DrawString(text, font, brush, new PointF(MarginX, MarginY + ModuleHeight));
            //新增字符串格式
            var drawFormat = new StringFormat { Alignment = StringAlignment.Center };
            float inpix = image.Width / resolution;//根据DPi求出 英寸数
            float widthmm = inpix * 25.4f;   //有每英寸像素求出毫米
            //g.DrawString(text, font, Brushes.Black, width / 2, height - 14, drawFormat);
            g.DrawString(text, font, /*Brushes.Black*/brush, new PointF(/*MarginX*/(int)(widthmm / 2), MarginY + ModuleHeight + 1), drawFormat);
 
        }
 
        #endregion
 
 
 
        return image;
    }
 
    /// <summary>
    /// 进行图形填充
    /// </summary>
    /// <param name="g"></param>
    /// <param name="rect"></param>
    /// <param name="reduction"></param>
    private void MakeBar(Graphics g, RectangleF rect, float reduction)
    {
        MakeBar(g, rect, reduction,this._codeBarColor);
    }
 
    /// <summary>
    /// 进行图形填充
    /// </summary>
    /// <param name="g"></param>
    /// <param name="rect"></param>
    /// <param name="reduction"></param>
    /// <param name="brushColor"></param>
    private void MakeBar(Graphics g, RectangleF rect, float reduction, Color brushColor)
    {
        float num = rect.Width * (reduction / 200f);
        float num2 = rect.Width - (rect.Width * (reduction / 200f));
 
        RectangleF ef = new RectangleF
        {
            X = rect.X + num,
            Y = rect.Y,
            Width = num2,
            Height = rect.Height
        };
        SolidBrush brush = new SolidBrush(brushColor);
        g.FillRectangle(brush, ef);
 
    }
 
    private char[] getPattern_c39(byte[] data)
    {   //0x2a  42为*
        //int num = 0x27;
        int num = 80;
        byte[] buffer = new byte[num + 1];
        buffer[0] = 0x2a;
        int index = 1;
        for (int i = 0; i < data.Length; i++)
        {
            buffer[index] = data[i];
            index++;
        }
        if (Checksum)
        {
            buffer[index] = this._checksum_c39(buffer, index);
            if (_isDisplayCheckCode)
            {
                this._checkData = ((char)buffer[index]).ToString();
            }
            index++;
        }
        buffer[index] = 0x2a;
        index++;
        char[] chArray = new char[index * 10];
        int num5 = 0;
        for (int j = 0; j < index; j++)
        {
            byte c = buffer[j];
            int num9 = this.indexFromCharacter(c);
            for (int k = 0; k < 9; k++)
            {
                chArray[num5] = (char)this.c39_bp[num9, k + 1];
                num5++;
            }
            chArray[num5] = '0';
            num5++;
        }
        return chArray;
    }
 
    private int indexFromCharacter(byte c)
    {
        //0x2c==44
        for (int i = 0; i < 0x2c; i++)
        {
            if (this.c39_bp[i, 0] == c)
            {
                return i;
            }
        }
        return -1;
    }
 
 
    private byte[] processExtended(byte[] data)
    {
        //0x25  38
        //0x4F  79 0x4E 78
        //int num = 0x4F;
        int num = data.Length - 1;
        byte[] sourceArray = new byte[num + 1];
        int index = 0;
        for (int i = 0; i < data.Length; i++)
        {
            byte c = data[i];
            if (this.valueFromCharacter(c) != -1)
            {
                sourceArray[index] = c;
                index++;
            }
            else
            {
                byte num5 = 0;
                byte num6 = 0;
                if (this.valuesFromExtended(c, ref num5, ref num6))
                {
                    sourceArray[index] = num5;
                    sourceArray[index + 1] = num6;
                    index += 2;
                }
            }
        }
        byte[] destinationArray = new byte[index];
        Array.Copy(sourceArray, destinationArray, index);
        return destinationArray;
    }
 
    /// <summary>
    /// 返回指定字符在code39合法字符数组中对应的索引
    /// </summary>
    /// <param name="c"></param>
    /// <returns></returns>
    private int valueFromCharacter(byte c)
    {
        //c39_cw为数组，保存的为合法的字符集信息[0-9A-Z+-*/%. ] 共43个
        //如果存在这个字符就返回c39_cw对应的索引
        for (int i = 0; i < /*0x2b*/this.c39_cw.Length; i++)
        {
            if (this.c39_cw[i] == c)
            {
                return i;
            }
        }
        return -1;
    }
 
    /// <summary>
    /// 判断字符集是否存在Extended
    /// </summary>
    /// <param name="c"></param>
    /// <param name="v1"></param>
    /// <param name="v2"></param>
    /// <returns></returns>
    private bool valuesFromExtended(byte c, ref byte v1, ref byte v2)
    {
        //0x55  85
        for (int i = 0; i < 0x55; i++)
        {
            if (this.c39_ex[i, 0] == c)
            {
                v1 = this.c39_ex[i, 1];
                v2 = this.c39_ex[i, 2];
                return true;
            }
        }
        return false;
    }
 
    private byte[] processTilde(string rawdata)
    {
        byte[] sourceArray = new byte[rawdata.Length];
        int index = 0;
        for (int i = 0; i < rawdata.Length; i++)
        {
            if (rawdata[i] != '~')
            {
                sourceArray[index] = (byte)rawdata[i];
                index++;
            }
            else if ((i + 3) < rawdata.Length)
            {
                string str = new string(new char[] { rawdata[i + 1], rawdata[i + 2], rawdata[i + 3] });
                int num3 = Convert.ToInt32(str, 10);
                if ((num3 > 0) &amp;&amp; (num3 <= 0xff))
                {
                    sourceArray[index] = (byte)num3;
                    index++;
                }
                if (num3 == 0x3e7)
                {
                    sourceArray[index] = 0x86;
                    index++;
                }
                i += 3;
            }
            else
            {
                sourceArray[index] = (byte)rawdata[i];
                index++;
            }
        }
        byte[] destinationArray = new byte[index];
        Array.Copy(sourceArray, destinationArray, index);
        return destinationArray;
    }
}

这个方法是根据DPI以及数据模块的高宽来确定条码的实际高宽。模块的宽度以毫米（mm）来算。类中的getBitmapImage方法的一个参数getBitmapImage为DPI。安卓用户安装平时常用的扫码软件即可做识别测试。就识别率来说还是可以的，扫描枪绝对是可以扫的出的。同时使用过MessagingToolkit.Barcode进行解码测试，万张无一误读

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转载请注明：清风亦平凡 » C#生成Code39(extend)条形码【非条形码字体】

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