C#条形码生成（二）----Code128抽象类

 Code128抽象类，设计思路是采用模板，C#的Drawing还是不熟悉，开始用了Pen画竖条，然后出来的图扫描枪根本不认，最后参考了网上已有的条形码写法，采用SetPixel方法，目前生成的Code128码扫描枪可以正确读取，但条形码的尺寸标准还没遵循，有待改进，在编写完GS1-128部分后，会来修改此部分图片代码

/// <summary>    /// Code128抽象类    /// </summary>    public abstract class absCode128 : IBarCode    {        protected string _encodedData;//编码数据        protected string _rawData;//原始数据        protected string _presentationData = null;//在条形码下面显示给人看的数据，如果为空，则取原始数据        protected bool _dataDisplay = true;//是否显示字体        protected byte _barCellWidth = 1;//模块单位宽度，单位Pix 默认1        protected bool _showBlank = true;//是否显示左右空白        protected byte _horizontalMulriple = 10;//水平左右空白对应模块的倍数        protected byte _verticalMulriple = 8;//垂直上下空白对应模块的倍数                protected byte _barHeight = 32;//条码高度，单位Pix 默认32        protected Color _backColor = Color.White;//条码背景色        protected Color _barColor = Color.Black;//条码颜色        protected byte _fontPadding;//字体与条形码的空间间隔        protected float _emSize;//字体大小        protected FontFamily _fontFamily;//字体样式        protected FontStyle _fontStyle;//字体样式        protected StringAlignment _textAlignment;//字体布局位置        protected Color _fontColor;//字体颜色        protected bool _fontPositionOnBottom;//字体位置是否是底部，如果不是，则在顶部                /// <summary>        /// 当前条形码种类        /// </summary>        public string BarCodeType        {            get            {                return System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name;            }        }        /// <summary>        /// 原始数据        /// </summary>        public string RawData        {            get { return this._rawData; }        }        /// <summary>        /// 条码展示数据        /// </summary>        public string PresentationData        {            get { return string.IsNullOrEmpty(this._presentationData) ? this._rawData : this._presentationData; }        }        /// <summary>        /// 条形码对应的编码数据        /// </summary>        public string EncodedData        {            get { return this._encodedData; }        }        /// <summary>        /// 是否在条形码上显示展示数据        /// </summary>        public bool DataDisplay        {            get { return this._dataDisplay; }            set { this._dataDisplay = value; }        }        /// <summary>        /// 条码高度，必须至少是条码宽度的0.15倍或6.35mm，两者取大者        /// 默认按照实际为32,单位mm        /// </summary>        public byte BarHeight        {            get { return this._barHeight; }            set            {                this._barHeight = value;            }        }        /// <summary>        /// 模块宽度  单位：pix        /// 默认宽度 1pix        /// </summary>        public byte BarCellWidth        {            get { return this._barCellWidth; }            set            {                if (value == 0)                {                    this._barCellWidth = 1;                }                else                {                    this._barCellWidth = value;                }            }        }        /// <summary>        /// 是否显示左右空白，默认标准显示        /// </summary>        public bool ShowBlank        {            get { return this._showBlank; }            set            {                this._showBlank = value;            }        }        /// <summary>        /// 左右空白对应模块宽度的倍数,国际标准最小为10，如果低于10，则取10        /// </summary>        public byte HorizontalMulriple        {            get { return this._horizontalMulriple; }            set            {                if (value < 10)                {                    this._horizontalMulriple = 10;                }                else                {                    this._horizontalMulriple = value;                }            }        }        /// <summary>        /// 水平空白pix        /// </summary>        public int HorizontalMargin        {            get            {                if (this.ShowBlank)                {                    return this._barCellWidth * this._horizontalMulriple;                }                else                {                    return 0;                }            }        }        /// <summary>        /// 垂直上下空白对应模块的倍数        /// </summary>        public byte VerticalMulriple        {            get { return this._verticalMulriple; }            set            {                this._verticalMulriple = value;            }        }        /// <summary>        /// 垂直空白        /// </summary>        public int VerticalMargin        {            get            {                if (this.ShowBlank)                {                    return this._barCellWidth * this._verticalMulriple;                }                else                {                    return 0;                }            }        }        /// <summary>        /// 字体与条形码的空间间隔,单位Pix        /// </summary>        public byte FontPadding        {            get { return this._fontPadding; }            set            {                this._fontPadding = value;            }        }        /// <summary>        /// 字体大小        /// </summary>        public float FontSize        {            get { return this._emSize; }            set { this._emSize = value; }        }        /// <summary>        /// 字体样式        /// </summary>        public FontFamily FontFamily        {            get { return this._fontFamily; }            set { this._fontFamily = value; }        }        /// <summary>        /// 字体样式        /// </summary>        public FontStyle FontStyle        {            get { return this._fontStyle; }            set { this._fontStyle = value; }        }        /// <summary>        /// 字体布局位置        /// </summary>        public StringAlignment TextAlignment        {            get { return this._textAlignment; }            set { this._textAlignment = value; }        }        /// <summary>        /// 字体颜色        /// </summary>        public Color FontColor        {            get { return this._fontColor; }            set { this._fontColor = value; }        }        public absCode128(string rawData)        {            this._rawData = rawData;            if (string.IsNullOrEmpty(this._rawData))            {                throw new Exception("空字符串无法生成条形码");            }            this._rawData = this._rawData.Trim();            if (!this.RawDataCheck())            {                throw new Exception(rawData + " 不符合 " + this.BarCodeType + " 标准");            }            this._encodedData = this.GetEncodedData();            //是否加入检验可编码最大字符数超出标准48，貌似只在EAN128中有规定必须不超出48            this.FontInit();        }        /// <summary>        /// 字体初始化        /// </summary>        private void FontInit()        {            this._fontPadding = 4;            this._emSize = 12;            this._fontFamily = new FontFamily("Times New Roman");            this._fontStyle = FontStyle.Regular;            this._textAlignment = StringAlignment.Center;            this._fontColor = Color.Black;        }        protected int GetBarCodePhyWidth()        {            //在212222这种BS单元下，要计算bsGroup对应模块宽度的倍率            //应该要将总长度减去1（因为Stop对应长度为7），然后结果乘以11再除以6，与左右空白相加后再加上2（Stop比正常的BS多出2个模块组）            int bsNum = (this._encodedData.Length - 1) * 11 / 6 + 2;//+ (this._showBlank ? this._blankMulriple * 2 : 0)            return bsNum * this._barCellWidth;        }        /// <summary>        /// 数据输入正确性验证        /// </summary>        /// <returns></returns>        protected abstract bool RawDataCheck();        /// <summary>        /// 获取当前Data对应的编码数据(条空组合)        /// </summary>        /// <returns></returns>        protected abstract string GetEncodedData();        #region 注销        ///// <summary>        ///// 得到条形码对应的图片,Graphics画图的读不出来        ///// </summary>        ///// <returns></returns>        //public Image GetBarCodeImage()        //{        //    float x, y;        //    x = this._blockWidth * this._blankMulriple;        //    y = x;        //    Bitmap image = new Bitmap((int)this.GetBarCodePhyWidth() + 1, (int)(this._barHeight + y * 2) + 1);        //    Graphics g = Graphics.FromImage(image);        //    g.Clear(this._backColor);//清除背景        //    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;        //    g.PageUnit = GraphicsUnit.Display;        //    Pen p = new Pen(this._barColor);        //    for (int i = 0; i < this._encodedData.Length; i++)        //    {        //        byte num = (byte)char.GetNumericValue(this._encodedData[i]);        //        if (i % 2 == 0)        //        {        //            //偶数位为bar,奇数位为sp,除了最后一个Stop，其他每个字符都是6位        //            p.Width = num * this._blockWidth;        //            g.DrawLine(p, x, y, x, y + this._barHeight);        //        }        //        x += num * this._blockWidth;        //    }        //    System.IO.MemoryStream ms = new System.IO.MemoryStream();        //    image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);        //    //结束绘制        //    p.Dispose();        //    g.Dispose();        //    image.Dispose();        //    return Image.FromStream(ms);        //}        #endregion        /// <summary>        /// 获取完整的条形码        /// </summary>        /// <returns></returns>        public Image GetBarCodeImage()        {            Image barImage = this.GetBarOnlyImage();            int width = barImage.Width;            int height = barImage.Height;            width += this.HorizontalMargin * 2;            height += this.VerticalMargin * 2;            if (this._dataDisplay)            {                height += this._fontPadding + (int)this._emSize;            }            Image image = new Bitmap(width, height);            Graphics g = Graphics.FromImage(image);            g.Clear(this._backColor);            g.DrawImage(barImage, this.HorizontalMargin, this.VerticalMargin, barImage.Width, barImage.Height);            if (this._dataDisplay)            {                Font drawFont = new Font(this._fontFamily, this._emSize, this._fontStyle, GraphicsUnit.Pixel);                Brush drawBrush = new SolidBrush(this._fontColor);                StringFormat drawFormat = new StringFormat();                drawFormat.Alignment = this._textAlignment;                RectangleF reF = new RectangleF(0, barImage.Height + this.VerticalMargin + this._fontPadding, width, this._emSize);                g.DrawString(this.PresentationData, drawFont, drawBrush, reF, drawFormat);                drawFont.Dispose();                drawBrush.Dispose();                drawFormat.Dispose();            }            System.IO.MemoryStream ms = new System.IO.MemoryStream();            image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);            //结束绘制            g.Dispose();            image.Dispose();            return Image.FromStream(ms);        }        /// <summary>        /// 获取仅包含条形码的图像        /// </summary>        /// <returns></returns>        private Image GetBarOnlyImage()        {            int width = (int)this.GetBarCodePhyWidth();            Bitmap image = new Bitmap(width, this._barHeight);            int ptr = 0;            for (int i = 0; i < this._encodedData.Length; i++)            {                int w = (int)char.GetNumericValue(this._encodedData[i]);                w *= this._barCellWidth;                Color c = i % 2 == 0 ? this._barColor : this._backColor;                for (int j = 0; j < w; j++)                {                    for (int h = 0; h < this._barHeight; h++)                    {                        image.SetPixel(ptr, h, c);                    }                    ptr++;                }            }            return image;        }    }