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C#教程之史上最简洁C# 生成条形码图片思路及示例
在网上看到一些人写关于条形码的代码都很长，有的甚至拿来卖，所以查了下资料，希望能对大家有帮助。
我的实现原理是：
其实Windows本身就有一个字体是用来显示条形码的。
只要将数字改为这种字体就变成了条形码。
windows字体库下，有如下八种字体可以用来将数字转换成条形码：
复制代码 代码如下:
Code39AzaleaNarrow1
Code39AzaleaNarrow2
Code39AzaleaNarrow3
Code39AzaleaRegular1
Code39AzaleaRegular2
Code39AzaleaWide1
Code39AzaleaWide2
Code39AzaleaWide3
把代码贴给大家参考：
复制代码 代码如下:
Bitmap b=new Bitmap(200,200);
Graphics g = Graphics.FromImage(b);
Font font = new Font("Code39AzaleaRegular2", 32);
g.DrawString("123456", font, Brushes.Black, new PointF(100,100));
pictureBox1.BackgroundImage = b;
pictureBox1.BackgroundImageLayout = ImageLayout.Zoom。
是不是很简单呢，亲们，思路给大家了，具体使用到项目中的时候，小伙伴们自己扩展下就可以了。
另附上一则示例中的应用
复制代码 代码如下:
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
{
/// <summary>
///绘制条形码
/// </summary>
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
/// <summary>
/// 根据条形码绘制图片
/// </summary>
/// <param name="strNumber">条形码</param>
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();
}
/// <summary>
/// 根据条形码绘制图片
/// </summary>
/// <param name="strNumber">条形码</param>
/// <param name="intFontSize">字体大小</param>
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
/// <summary>
/// 根据条形码绘制图片
/// </summary>
/// <param name="strNumber">条形码</param>
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;
/// <summary>
/// 放大倍数
/// </summary>
public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
private int m_Height = 40;
/// <summary>
/// 图形高
/// </summary>
public int Height { get { return m_Height; } set { m_Height = value; } }
private Font m_ViewFont = null;
/// <summary>
/// 字体大小
/// </summary>
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
{
/// <summary>
/// 基本类别 1234567890ABC
/// </summary>
Code39Normal,
/// <summary>
/// 全ASCII方式 +A+B 来表示小写
/// </summary>
Code39FullAscII
}
/// <summary>
/// 获得条码图形
/// </summary>
/// <param name="p_Text">文字信息</param>
/// <param name="p_Model">类别</param>
/// <param name="p_StarChar">是否增加前后*号</param>
/// <returns>图形</returns>
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] <= 122)
{
_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;
}
/// <summary>
/// 绘制编码图形
/// </summary>
/// <param name="p_Text">编码</param>
/// <returns>图形</returns>
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;
}
/// <summary>
/// 绘制文字,文字宽度大于图片宽度将不显示
/// </summary>
/// <param name="p_CodeImage">图形</param>
/// <param name="p_Text">文字</param>
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
}
}
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