C#生成Code39(extend)条形码【非条形码字体】
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。
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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。
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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。
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编制简单。简单的开发技术就能快速生成相应的编码图像。
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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($),斜扛(/),加号(+)以及百分号(%)。
4、其余的输入将被忽略。
5、code39通常情况下不需要校验码。但是对於精确度要求高的应用，需要在code39条形码後面增加一个校验码。
1、26个大写字母（A - Z），
2、十个数字（0 - 9），
3、连接号(-),句号（.）,空格,美圆符号($),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。
在线解码网站：http://cli.im/deqr/、http://www.fbqr.com/desQR#
WinForm的例子下载：点击下载DEMO
