C#生成Code39条形码而非条形码字体的方法

由于Code39编译简单、能够对任意长度的数据进行编码、支持设备比较广泛所以被广泛的采用，下面介绍下C#生成Code39条形码而非条形码字体的方法,需要的朋友可以参考下

由于Code39编译简单、能够对任意长度的数据进行编码、支持设备比较广泛所以被广泛的采用，下面通过文字说明和代码分析给大家介绍下C#生成Code39条形码而非条形码字体的方法。

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。
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。
编制简单。简单的开发技术就能快速生成相应的编码图像。
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

　　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。
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：

 代码分享:

/// <summary> /// Code39一维码生成类 /// http://www.cnblogs.com/bluescreen/p/4689351.html /// </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 & 1) != 1)     {      RectangleF rect = new RectangleF(MarginX + num7, MarginY, ModuleWidth, ModuleHeight);      MakeBar(g, rect, Reduction);     }     num7 += 1f * ModuleWidth;    }    else    {     if ((num6 & 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) && (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&&!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) && (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。