C# asp.net 条形码 code39条码 生成 扫描枪能识别(好东西转载...) 枫

这几天一直在弄128条码的事情，找了相关的资料，也没找到。后来没办法只能改成code39的条码。现在把它写出来，与大家分享

1.先下载一种免费的 code39条码字体   点击这里也可下载

2.建个类 为 code39 并写入以下代码  

publicsealedclass Code39
    {
        #region private variables
        ///<summary>
        /// The Space Between each of Title, BarCode, BarCodeString 
        ///</summary>
privateconstint SPACE_HEIGHT =3;
        SizeF _sizeLabel = SizeF.Empty;
        SizeF _sizeBarCodeValue = SizeF.Empty;
        SizeF _sizeBarCodeString = SizeF.Empty;

        #endregion

        #region Label
        privatestring _label =null;
        private Font _labelFont =null;
        ///<summary>
        /// BarCode Title (条码标签)
        ///</summary>
publicstring Label
        {
            set { _label = value; }
        }
        ///<summary>
        /// BarCode Title Font (条码标签使用的字体)
        ///</summary>
public Font LabelFont
        {
            get
            {
                if (_labelFont ==null)
                    returnnew Font("Arial", 10);
                return _labelFont;
            }
            set { _labelFont = value; }
        }
        #endregion

        privatestring _additionalInfo =null;
        private Font _addtionalInfoFont =null;
        ///<summary>
        /// Additional Info Font (附加信息字体)
        ///</summary>
public Font AdditionalInfoFont
        {
            set { _addtionalInfoFont = value; }
            get
            {
                if (_addtionalInfoFont ==null) returnnew Font("Arial", 10);
                return _addtionalInfoFont;
            }
        }
        ///<summary>
        /// Additional Info Content, if "ShowBarCodeValue" is true, the info is unvisible
        /// 附加信息，如果设置ShowBarCodeValue为true,则此项不显示
        ///</summary>
publicstring AdditionalInfo
        {
            set { _additionalInfo = value; }
        }

        #region BarCode Value and Font
        privatestring _barCodeValue =null;
        ///<summary>
        /// BarCode Value (条码值)
        ///</summary>
publicstring BarCodeValue
        {
            get
            {
                if (string.IsNullOrEmpty(_barCodeValue))
                    thrownew NullReferenceException("The BarCodeValue has not been set yet!");
                return _barCodeValue;
            }
            set { _barCodeValue = value.StartsWith("*") && value.EndsWith("*") ? value : "*"+ value +"*"; }
        }

        privatebool _showBarCodeValue =false;
        ///<summary>
        /// whether to show the original string of barcode value bellow the barcode
        /// 是否在条码下方显示条码值，默认为false
        ///</summary>
publicbool ShowBarCodeValue
        {
            set { _showBarCodeValue = value; }
        }

        private Font _barCodeValueFont =null;
        ///<summary>
        /// the font of the codestring to show
        /// 条码下方显示的条码值的字体
        ///</summary>
public Font BarCodeValueFont
        {
            get
            {
                if (_barCodeValueFont ==null)
                    returnnew Font("Arial", 10);
                return _barCodeValueFont;
            }
            set { _barCodeValueFont = value; }
        }

        privateint _barCodeFontSize =50;
        ///<summary>
        /// the font size of the barcode value to draw
        /// 条码绘制的大小，默认50
        ///</summary>
publicint BarCodeFontSzie
        {
            set { _barCodeFontSize = value; }
        }
        #endregion

        #region generate the barcode image
        private Bitmap BlankBackImage
        {
            get
            {
                int barCodeWidth =0, barCodeHeight =0;
                using (Bitmap bmp =new Bitmap(1, 1, PixelFormat.Format32bppArgb))
                {
                    using (Graphics g = Graphics.FromImage(bmp))
                    {
                        if (!string.IsNullOrEmpty(_label))
                        {
                            _sizeLabel = g.MeasureString(_label, LabelFont);
                            barCodeWidth = (int)_sizeLabel.Width;
                            barCodeHeight = (int)_sizeLabel.Height + SPACE_HEIGHT;
                        }

                        _sizeBarCodeValue = g.MeasureString(BarCodeValue, new Font("Free 3 of 9 Extended", _barCodeFontSize));
                        barCodeWidth = Math.Max(barCodeWidth, (int)_sizeBarCodeValue.Width);
                        barCodeHeight += (int)_sizeBarCodeValue.Height;

                        if (_showBarCodeValue)
                        {
                            _sizeBarCodeString = g.MeasureString(_barCodeValue, BarCodeValueFont);
                            barCodeWidth = Math.Max(barCodeWidth, (int)_sizeBarCodeString.Width);
                            barCodeHeight += (int)_sizeBarCodeString.Height + SPACE_HEIGHT;
                        }
                        //else
                        //{
                        //    if (!string.IsNullOrEmpty(_additionalInfo))
                        //    {
                        //        _sizeAdditionalInfo = g.MeasureString(_additionalInfo, AdditionalInfoFont);
                        //        barCodeWidth = Math.Max(barCodeWidth, (int)_sizeAdditionalInfo.Width);
                        //        barCodeHeight += (int)_sizeAdditionalInfo.Height + SPACE_HEIGHT;
                        //    }
                        //}
                    }
                }

                returnnew Bitmap(barCodeWidth, barCodeHeight, PixelFormat.Format32bppArgb);
            }
        }

        ///<summary>
        /// Draw the barcode value to the blank back image and output it to the browser
        /// 绘制WebForm形式的条码
        ///</summary>
        ///<param name="ms">Recommand the "Response.OutputStream" 使用 Response.OutputStream</param>
        ///<param name="imageFormat">The Image format to the Browser 输出到浏览器到图片格式，建议GIF</param>
public Bitmap CreateWebForm(Stream ms, ImageFormat imageFormat)
        {
            int barCodeWidth, barCodeHeight;
            using (Bitmap bmp =this.BlankBackImage)
            {
                barCodeHeight = bmp.Height;
                barCodeWidth = bmp.Width;
                using (Graphics g = Graphics.FromImage(bmp))
                {
                    g.Clear(Color.White);
                    g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                    int vPos =0;
                    ////Draw Label String
if (!string.IsNullOrEmpty(_label))
                    {
                        g.DrawString(_label, LabelFont, new SolidBrush(Color.Black),
                            XCenter((int)_sizeLabel.Width, barCodeWidth), vPos);
                        vPos += (int)_sizeLabel.Height + SPACE_HEIGHT;
                    }
                    else { vPos = SPACE_HEIGHT; }

                    ////Draw The Bar Value
                    g.DrawString(_barCodeValue, new Font("Free 3 of 9 Extended", _barCodeFontSize), new SolidBrush(Color.Black),
                        XCenter((int)_sizeBarCodeValue.Width, barCodeWidth), vPos);
                    ////Draw the BarValue String
if (_showBarCodeValue)
                    {
                        g.DrawString(_barCodeValue, BarCodeValueFont, new SolidBrush(Color.Black),
                            XCenter((int)_sizeBarCodeString.Width, barCodeWidth),
                            vPos + (int)_sizeBarCodeValue.Height);
                    }
                    //else
                    //{
                    //    if (!string.IsNullOrEmpty(_additionalInfo))
                    //    {
                    //        g.DrawString(_additionalInfo, AdditionalInfoFont, new SolidBrush(Color.Black),
                    //        XCenter((int)_sizeAdditionalInfo.Width, barCodeWidth),
                    //        vPos + (int)_sizeBarCodeValue.Height);
                    //    }
                    //}
                }

                bmp.Save(ms, imageFormat);
                return bmp;
            }
        }
        ///<summary>
        /// 生成winform格式的条码
        ///</summary>
        ///<param name="imageFormat">图片格式，建议GIF</param>
        ///<returns>Stream类型</returns>
public Stream CreateWinForm(ImageFormat imageFormat)
        {
            int barCodeWidth, barCodeHeight;
            using (Bitmap bmp =this.BlankBackImage)
            {
                barCodeHeight = bmp.Height;
                barCodeWidth = bmp.Width;
                using (Graphics g = Graphics.FromImage(bmp))
                {
                    g.Clear(Color.White);
                    g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                    int vPos =0;
                    ////Draw Label String
if (!string.IsNullOrEmpty(_label))
                    {
                        g.DrawString(_label, LabelFont, new SolidBrush(Color.Black),
                            XCenter((int)_sizeLabel.Width, barCodeWidth), vPos);
                        vPos += (int)_sizeLabel.Height + SPACE_HEIGHT;
                    }
                    else { vPos = SPACE_HEIGHT; }

                    ////Draw The Bar Value
                    g.DrawString(_barCodeValue, new Font("Free 3 of 9 Extended", _barCodeFontSize), new SolidBrush(Color.Black),
                        XCenter((int)_sizeBarCodeValue.Width, barCodeWidth), vPos);
                    ////Draw the BarValue String
if (_showBarCodeValue)
                    {
                        g.DrawString(_barCodeValue, BarCodeValueFont, new SolidBrush(Color.Black),
                            XCenter((int)_sizeBarCodeString.Width, barCodeWidth),
                            vPos + (int)_sizeBarCodeValue.Height);
                    }
                    //else
                    //{
                    ////if (!string.IsNullOrEmpty(_additionalInfo))
                    ////{
                    ////    g.DrawString(_additionalInfo, AdditionalInfoFont, new SolidBrush(Color.Black),
                    //////XCenter((int)_sizeAdditionalInfo.Width, barCodeWidth),
                    ////    vPos + (int)_sizeBarCodeValue.Height);
                    ////}
                    //}
                }

                Stream ms =new MemoryStream();
                bmp.Save(ms, imageFormat);
                return ms;
            }
        }
        #endregion

        privatestaticint XCenter(int subWidth, int globalWidth)
        {
            return (globalWidth - subWidth) /2;
        }

        
    }

  

3.如果是web程序 请调用 CreateWebForm 如果是cs程序 则使用CreateWinForm

 4.新建一aspx文件，写入以下代码        

protectedvoid Page_Load(object sender, EventArgs e)
    {
        Code39 code39 =new Code39();
        code39.BarCodeValue ="LDSO-001";
        code39.BarCodeFontSzie =60;
        // code39.Label = "39码，底部显示码值";
        code39.ShowBarCodeValue =true;
  Response.Write(code39.CreateWebForm(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif));
        code39 =null;
    }

顺便把源代码也给奉上吧

	作者：chenhuzi   出处：http://www.cnblogs.com/chenhuzi
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