『Code 39条形码介绍』
using System.Drawing;
using System.Drawing.Imaging;
public abstract class DrawImageBord
...{
protected virtual string BordRuleName
...{
get ...{ return string.Empty; }
}
protected virtual System.Collections.Hashtable Roles
...{
get ...{ return new System.Collections.Hashtable(); }
}
string drawString;
int width = 800; //画布的宽度(可计算)
int height = 36;//1CM
int unitWidth = 1; //
int currentLocation = 0;
public DrawImageBord(string s)
...{
drawString = s;
}
public virtual void Draw(System.IO.Stream target)
...{
Bitmap bm = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bm);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
//画布和边的设定
g.Clear(Color.White);
g.DrawRectangle(Pens.White, 0, 0, width, height);
for(int i = 0; i < drawString.Length; i++)
...{
this.DrawString(drawString[i].ToString(), g);
}
bm.Save(target, ImageFormat.Jpeg);
}
protected virtual void DrawString(string s, Graphics g)
...{
System.Collections.Hashtable hash = this.Roles;
object o = hash[s];
if (o == null) return;
char[] chars = o.ToString().ToCharArray();
if (chars.Length > 9) return;
SolidBrush blackBrush = new SolidBrush(Color.Black);
SolidBrush witeBrush = new SolidBrush(Color.White);
for(int i = 0; i < 5; i++)
...{
//画第一个 0 黑条
if (chars[i] == '0')
...{
Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(blackBrush, re1);
currentLocation += unitWidth;
}
else
...{
Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height);
g.FillRectangle(blackBrush, re1);
currentLocation += 3 * unitWidth;
}
//画第6个 5 白条
if ((i + 5) < 9)
...{
if (chars[i+5] == '0')
...{
Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(witeBrush, re1);
currentLocation += unitWidth;
}
else
...{
Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height);
g.FillRectangle(witeBrush, re1);
currentLocation += 3 * unitWidth;
}
}
}
Rectangle re2 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(witeBrush, re2);
currentLocation += unitWidth;
}
}
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
/**//**//**//// <summary>
/// CODE39DrawImageBord 的摘要说明
/// </summary>
public class CODE39DrawImageBord : DrawImageBord
......{
private System.Collections.Hashtable hash = new System.Collections.Hashtable();
protected override string BordRuleName
......{
get ......{ return "CODE39"; }
}
public CODE39DrawImageBord(string s)
: base(s)
......{
}
protected override System.Collections.Hashtable Roles
......{
get
......{
if (hash.Count > 0) return hash;
hash.Add("0", "001100100");
hash.Add("1", "100010100");
hash.Add("2", "010010100");
hash.Add("3", "110000100");
hash.Add("4", "001010100");
hash.Add("5", "101000100");
hash.Add("6", "011000100");
hash.Add("7", "000110100");
hash.Add("8", "100100100");
hash.Add("9", "010100100");
hash.Add("A", "100010010");
hash.Add("B", "010010010");
hash.Add("C", "110000010");
hash.Add("D", "001010010");
hash.Add("E", "101000010");
hash.Add("F", "011000010");
hash.Add("G", "000110010");
hash.Add("H", "100100010");
hash.Add("I", "010100010");
hash.Add("J",
code39条码能表示字母、数字和其它一些符号共43个字符：A -Z, 0-9, -.$/ + %, space等，其主要特点如下：
◆条码的长度是可变化的
◆通常用“*”号作为起始、终止符
◆校验码不用
◆代码密度介于3 - 9.4个字符/每英寸
◆空白区是窄条的10倍
◆用于工业、图书、以及票证自动化管理上
◆条码的长度是可变化的
◆通常用“*”号作为起始、终止符
◆校验码不用
◆代码密度介于3 - 9.4个字符/每英寸
◆空白区是窄条的10倍
◆用于工业、图书、以及票证自动化管理上
三九码是Intermec公司于1975年推出的一种条码，它可表示数字、英文字母以及“-”、“.”、“/”、“ ”、“%”、“$”、“ ”（空格）和“*”共44个符号，其中“*”仅作为启始符和终止符。
三九码且有编码规则简单、误码率低、所能表示字符个数多等特点，因此在各个领域有着极为广泛的应用。我国也制定了相应的国家标准（GB12908-91）。
三九码仅有两种单元宽度——分别为宽单元和窄单元。宽单元这宽度为窄单元的1到3倍，一般多选用2倍、2.5倍或3倍。三九码的每一个条码字符由九个单元组成，其中有三个宽单元，其余是窄单元，因此称为三九码。
我国有的图书馆使用的39码使用了特殊的校验字符，条码软件都可打印适用于图书馆的39码。
三九码且有编码规则简单、误码率低、所能表示字符个数多等特点，因此在各个领域有着极为广泛的应用。我国也制定了相应的国家标准（GB12908-91）。
三九码仅有两种单元宽度——分别为宽单元和窄单元。宽单元这宽度为窄单元的1到3倍，一般多选用2倍、2.5倍或3倍。三九码的每一个条码字符由九个单元组成，其中有三个宽单元，其余是窄单元，因此称为三九码。
我国有的图书馆使用的39码使用了特殊的校验字符，条码软件都可打印适用于图书馆的39码。
代码原创: LovlyPuppy
实现该功能分两个类,第一个类 DrawImageBord.cs
using System.Drawing;using System.Drawing.Imaging;public abstract class DrawImageBord ...{ protected virtual string BordRuleName ...{ get ...{ return string.Empty; } } protected virtual System.Collections.Hashtable Roles ...{ get ...{ return new System.Collections.Hashtable(); } } string drawString; int width = 800; //画布的宽度(可计算) int height = 36;//1CM int unitWidth = 1; // int currentLocation = 0; public DrawImageBord(string s) ...{ drawString = s; } public virtual void Draw(System.IO.Stream target) ...{ Bitmap bm = new Bitmap(width, height); Graphics g = Graphics.FromImage(bm); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default; g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias; //画布和边的设定 g.Clear(Color.White); g.DrawRectangle(Pens.White, 0, 0, width, height); for(int i = 0; i < drawString.Length; i++) ...{ this.DrawString(drawString[i].ToString(), g); } bm.Save(target, ImageFormat.Jpeg); } protected virtual void DrawString(string s, Graphics g) ...{ System.Collections.Hashtable hash = this.Roles; object o = hash[s]; if (o == null) return; char[] chars = o.ToString().ToCharArray(); if (chars.Length > 9) return; SolidBrush blackBrush = new SolidBrush(Color.Black); SolidBrush witeBrush = new SolidBrush(Color.White); for(int i = 0; i < 5; i++) ...{ //画第一个 0 黑条 if (chars[i] == '0') ...{ Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height); g.FillRectangle(blackBrush, re1); currentLocation += unitWidth; } else ...{ Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height); g.FillRectangle(blackBrush, re1); currentLocation += 3 * unitWidth; } //画第6个 5 白条 if ((i + 5) < 9) ...{ if (chars[i+5] == '0') ...{ Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height); g.FillRectangle(witeBrush, re1); currentLocation += unitWidth; } else ...{ Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height); g.FillRectangle(witeBrush, re1); currentLocation += 3 * unitWidth; } } } Rectangle re2 = new Rectangle(currentLocation, 0, unitWidth, height); g.FillRectangle(witeBrush, re2); currentLocation += unitWidth; } } 第二个类CODE39DrawImageBord.cs 继承DrawImageBord.cs
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;/**//**//**//// <summary>/// CODE39DrawImageBord 的摘要说明/// </summary>public class CODE39DrawImageBord : DrawImageBord......{ private System.Collections.Hashtable hash = new System.Collections.Hashtable(); protected override string BordRuleName ......{ get ......{ return "CODE39"; } } public CODE39DrawImageBord(string s) : base(s) ......{ } protected override System.Collections.Hashtable Roles ......{ get ......{ if (hash.Count > 0) return hash; hash.Add("0", "001100100"); hash.Add("1", "100010100"); hash.Add("2", "010010100"); hash.Add("3", "110000100"); hash.Add("4", "001010100"); hash.Add("5", "101000100"); hash.Add("6", "011000100"); hash.Add("7", "000110100"); hash.Add("8", "100100100"); hash.Add("9", "010100100"); hash.Add("A", "100010010"); hash.Add("B", "010010010"); hash.Add("C", "110000010"); hash.Add("D", "001010010"); hash.Add("E", "101000010"); hash.Add("F", "011000010"); hash.Add("G", "000110010"); hash.Add("H", "100100010"); hash.Add("I", "010100010"); hash.Add("J",