C# · 12月 28, 2021

史上最简洁C# 生成条形码图片思路及示例分享

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));
  picture@R_569_2419@1.BackgroundImage = b;
  picture@R_569_2419@1.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,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”,intFontSize);
//设置图片大小
Image img = new Bitmap(1,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,_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,_DrawWidth,m_Height));
}
else
{
_Garphics.FillRectangle(Brushes.White,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,_StarHeight,p_CodeImage.Width,(int)_FontSize.Height));
int _StarWidth = (p_CodeImage.Width – (int)_FontSize.Width) / 2;
_Graphics.DrawString(p_Text,m_ViewFont,_StarWidth,_StarHeight);
_Graphics.Dispose();
}
#endregion
}
}