史上最简洁C# 生成条形码图片思路及示例分享

using System;

using System.Collections.Generic;

using System.Web;

using System.Drawing;

using System.Drawing.Imaging;

using System.Drawing.Drawing2D;

using System.Drawing.Text;

using System.Drawing.Design;

using System.IO;

using System.Collections;

namespace Public.Equipment

{

///

///绘制条形码

///

public class DrawingBarCode

{

public DrawingBarCode()

{

//

//TODO: 在此处添加构造函数逻辑

//

}

#region 根据字体产生条形码

///

/// 根据条形码绘制图片

///

/// 条形码

public void DrawingBarCode(string strNumber)

{

PrivateFontCollection fonts = new PrivateFontCollection();

//39带数字

//fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/V100010_.TTF”);

//FontFamily ff = new FontFamily(“C39HrP48DlTt”, fonts);

//39码

strNumber = “*” + strNumber + “*”;

fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/FREE3OF9X.TTF”);

FontFamily ff = new FontFamily(“Free 3 of 9 Extended”, fonts);

//接近条形码

//fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/V100014_.TTF”);

//FontFamily ff = new FontFamily(“C39P24DlTt”, fonts);

Font font = new Font(ff, 12);

//设置图片大小

Image img = new Bitmap(1, 1);

Graphics g = Graphics.FromImage(img);

SizeF fontSize = g.MeasureString(strNumber, font);

int intWidth = Convert.ToInt32(fontSize.Width);

int intHeight = Convert.ToInt32(fontSize.Height);

g.Dispose();

img.Dispose();

img = new Bitmap(intWidth, intHeight);

g = Graphics.FromImage(img);

g.Clear(Color.White);

g.CompositingQuality = CompositingQuality.HighQuality;

g.SmoothingMode = SmoothingMode.HighQuality;

g.DrawString(strNumber, font, Brushes.Black, 0, 0);

MemoryStream stream = new MemoryStream();

img.Save(stream, ImageFormat.Jpeg);

HttpContext.Current.Response.ClearContent();

HttpContext.Current.Response.ContentType = “image/Jpeg”;

HttpContext.Current.Response.BinaryWrite(stream.ToArray());

g.Dispose();

img.Dispose();

}

///

/// 根据条形码绘制图片

///

/// 条形码

/// 字体大小

public void DrawingBarCode(string strNumber,int intFontSize)

{

PrivateFontCollection fonts = new PrivateFontCollection();

//39带数字

//fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/V100010_.TTF”);

//FontFamily ff = new FontFamily(“C39HrP48DlTt”, fonts);

//39码

strNumber = “*” + strNumber + “*”;

fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/FREE3OF9X.TTF”);

FontFamily ff = new FontFamily(“Free 3 of 9 Extended”, fonts);

//接近条形码

//fonts.AddFontFile(HttpContext.Current.Server.MapPath(“.”) + “/BarCodeFonts/V100014_.TTF”);

//FontFamily ff = new FontFamily(“C39P24DlTt”, fonts);

Font font = new Font(ff, intFontSize);

//设置图片大小

Image img = new Bitmap(1, 1);

Graphics g = Graphics.FromImage(img);

SizeF fontSize = g.MeasureString(strNumber, font);

int intWidth = Convert.ToInt32(fontSize.Width);

int intHeight = Convert.ToInt32(fontSize.Height);

g.Dispose();

img.Dispose();

img = new Bitmap(intWidth, intHeight);

g = Graphics.FromImage(img);

g.Clear(Color.White);

g.CompositingQuality = CompositingQuality.HighQuality;

g.SmoothingMode = SmoothingMode.HighQuality;

g.DrawString(strNumber, font, Brushes.Black, 0, 0);

MemoryStream stream = new MemoryStream();

img.Save(stream, ImageFormat.Jpeg);

HttpContext.Current.Response.ClearContent();

HttpContext.Current.Response.ContentType = “image/Jpeg”;

HttpContext.Current.Response.BinaryWrite(stream.ToArray());

g.Dispose();

img.Dispose();

}

#endregion

#region 绘制Code39码

///

/// 根据条形码绘制图片

///

/// 条形码

public void DrawingBarCode39(string strNumber,int intFontSize,bool WithStart)

{

ViewFont = new Font(“宋体”, intFontSize);

Image img = GetCodeImage(strNumber, Code39Model.Code39Normal, WithStart);

MemoryStream stream = new MemoryStream();

img.Save(stream, ImageFormat.Jpeg);

HttpContext.Current.Response.Clear();

HttpContext.Current.Response.ClearContent();

HttpContext.Current.Response.BufferOutput = true;

HttpContext.Current.Response.ContentType = “image/Jpeg”;

HttpContext.Current.Response.BinaryWrite(stream.GetBuffer());

HttpContext.Current.Response.Flush();

}

private Hashtable m_Code39 = new Hashtable();

private byte m_Magnify = 0;

///

/// 放大倍数

///

public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }

private int m_Height = 40;

///

/// 图形高

///

public int Height { get { return m_Height; } set { m_Height = value; } }

private Font m_ViewFont = null;

///

/// 字体大小

///

public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }

/**

Code39码的编码规则是：

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

*/

public DrawingBarCode(Boolean IsCode39)

{

m_Code39.Add(“A”, “1101010010110”);

m_Code39.Add(“B”, “1011010010110”);

m_Code39.Add(“C”, “1101101001010”);

m_Code39.Add(“D”, “1010110010110”);

m_Code39.Add(“E”, “1101011001010”);

m_Code39.Add(“F”, “1011011001010”);

m_Code39.Add(“G”, “1010100110110”);

m_Code39.Add(“H”, “1101010011010”);

m_Code39.Add(“I”, “1011010011010”);

m_Code39.Add(“J”, “1010110011010”);

m_Code39.Add(“K”, “1101010100110”);

m_Code39.Add(“L”, “1011010100110”);

m_Code39.Add(“M”, “1101101010010”);

m_Code39.Add(“N”, “1010110100110”);

m_Code39.Add(“O”, “1101011010010”);

m_Code39.Add(“P”, “1011011010010”);

m_Code39.Add(“Q”, “1010101100110”);

m_Code39.Add(“R”, “1101010110010”);

m_Code39.Add(“S”, “1011010110010”);

m_Code39.Add(“T”, “1010110110010”);

m_Code39.Add(“U”, “1100101010110”);

m_Code39.Add(“V”, “1001101010110”);

m_Code39.Add(“W”, “1100110101010”);

m_Code39.Add(“X”, “1001011010110”);

m_Code39.Add(“Y”, “1100101101010”);

m_Code39.Add(“Z”, “1001101101010”);

m_Code39.Add(“0”, “1010011011010”);

m_Code39.Add(“1”, “1101001010110”);

m_Code39.Add(“2”, “1011001010110”);

m_Code39.Add(“3”, “1101100101010”);

m_Code39.Add(“4”, “1010011010110”);

m_Code39.Add(“5”, “1101001101010”);

m_Code39.Add(“6”, “1011001101010”);

m_Code39.Add(“7”, “1010010110110”);

m_Code39.Add(“8”, “1101001011010”);

m_Code39.Add(“9”, “1011001011010”);

m_Code39.Add(“+”, “1001010010010”);

m_Code39.Add(“-“, “1001010110110”);

m_Code39.Add(“*”, “1001011011010”);

m_Code39.Add(“/”, “1001001010010”);

m_Code39.Add(“%”, “1010010010010”);

m_Code39.Add(“$”, “1001001001010”);

m_Code39.Add(“.”, “1100101011010”);

m_Code39.Add(” “, “1001101011010”);

}

public enum Code39Model

{

///

/// 基本类别 1234567890ABC

///

Code39Normal,

///

/// 全ASCII方式 +A+B 来表示小写

///

Code39FullAscII

}

///

/// 获得条码图形

///

/// 文字信息

/// 类别

/// 是否增加前后*号

/// 图形

public Bitmap GetCodeImage(string p_Text, Code39Model p_Model, bool p_StarChar)

{

string _ValueText = “”;

string _CodeText = “”;

char[] _ValueChar = null;

switch (p_Model)

{

case Code39Model.Code39Normal:

_ValueText = p_Text.ToUpper();

break;

default:

_ValueChar = p_Text.ToCharArray();

for (int i = 0; i != _ValueChar.Length; i++)

{

if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i]

{

_ValueText += “+” + _ValueChar[i].ToString().ToUpper();

}

else

{

_ValueText += _ValueChar[i].ToString();

}

}

break;

}

_ValueChar = _ValueText.ToCharArray();

if (p_StarChar == true) _CodeText += m_Code39[“*”];

for (int i = 0; i != _ValueChar.Length; i++)

{

if (p_StarChar == true && _ValueChar[i] == ‘*’) throw new Exception(“带有起始符号不能出现*”);

object _CharCode = m_Code39[_ValueChar[i].ToString()];

if (_CharCode == null) throw new Exception(“不可用的字符” + _ValueChar[i].ToString());

_CodeText += _CharCode.ToString();

}

if (p_StarChar == true) _CodeText += m_Code39[“*”];

Bitmap _CodeBmp = GetImage(_CodeText);

GetViewImage(_CodeBmp, p_Text);

return _CodeBmp;

}

///

/// 绘制编码图形

///

/// 编码

/// 图形

private Bitmap GetImage(string p_Text)

{

char[] _Value = p_Text.ToCharArray();

//宽 == 需要绘制的数量*放大倍数 + 两个字的宽

Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1), (int)m_Height);

Graphics _Garphics = Graphics.FromImage(_CodeImage);

_Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));

int _LenEx = 0;

for (int i = 0; i != _Value.Length; i++)

{

int _DrawWidth = m_Magnify + 1;

if (_Value[i] == ‘1’)

{

_Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));

}

else

{

_Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));

}

_LenEx += _DrawWidth;

}

_Garphics.Dispose();

return _CodeImage;

}

///

/// 绘制文字,文字宽度大于图片宽度将不显示

///

/// 图形

/// 文字

private void GetViewImage(Bitmap p_CodeImage, string p_Text)

{

if (m_ViewFont == null) return;

Graphics _Graphics = Graphics.FromImage(p_CodeImage);

SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);

if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height – 20)

{

_Graphics.Dispose();

return;

}

int _StarHeight = p_CodeImage.Height – (int)_FontSize.Height;

_Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));

int _StarWidth = (p_CodeImage.Width – (int)_FontSize.Width) / 2;

_Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);

_Graphics.Dispose();

}

#endregion

}

}