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条码生成代码(Code39码)

發布時間：2023/12/10 编程问答 34 豆豆

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zryou 的條碼生成代碼(Code39碼)

『Code 39條形碼介紹』

　code39條碼能表示字母、數字和其它一些符號共43個字符：A -Z, 0-9, -.$/ + %, space等，其主要特點如下：
　　◆條碼的長度是可變化的
　　◆通常用“*”號作為起始、終止符
　　◆校驗碼不用
　　◆代碼密度介于3 - 9.4個字符/每英寸　　　　　　
　　◆空白區是窄條的10倍
　　◆用于工業、圖書、以及票證自動化管理上

三九碼是Intermec公司于1975年推出的一種條碼，它可表示數字、英文字母以及“-”、“.”、“/”、“ ”、“%”、“$”、“ ”（空格）和“*”共44個符號，其中“*”僅作為啟始符和終止符。
三九碼且有編碼規則簡單、誤碼率低、所能表示字符個數多等特點，因此在各個領域有著極為廣泛的應用。我國也制定了相應的國家標準（GB12908-91）。
三九碼僅有兩種單元寬度——分別為寬單元和窄單元。寬單元這寬度為窄單元的1到3倍，一般多選用2倍、2.5倍或3倍。三九碼的每一個條碼字符由九個單元組成，其中有三個寬單元，其余是窄單元，因此稱為三九碼。
我國有的圖書館使用的39碼使用了特殊的校驗字符，條碼軟件都可打印適用于圖書館的39碼。

代碼原創: LovlyPuppy

實現該功能分兩個類,第一個類 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;?? //畫布的寬度(可計算)
???? 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;

???????? //畫布和邊的設定??
???????? 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++)
????????????? ...{
???????????????? //畫第一個?? 0?? 黑條
????????????????? 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;
????????????????? }
???????????????? //畫第6個???? 5?? 白條
????????????????? 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;

??? }
}
第二個類CODE39DrawImageBord.cs 繼承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 的摘要說明
/// </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", "001100010");
??????????? hash.Add("K", "100010001");
??????????? hash.Add("L", "010010001");

??????????? hash.Add("M", "110000001");
??????????? hash.Add("N", "001010001");
??????????? hash.Add("O", "101000001");
??????????? hash.Add("P", "011000001");
??????????? hash.Add("Q", "000110001");
??????????? hash.Add("R", "100100001");
??????????? hash.Add("S", "010100001");

??????????? hash.Add("T", "001100001");
??????????? hash.Add("U", "100011000");
??????????? hash.Add("V", "010011000");
??????????? hash.Add("W", "110001000");
??????????? hash.Add("X", "001011000");
??????????? hash.Add("Y", "101001000");
??????????? hash.Add("Z", "011001000");

??????????? hash.Add("-", "000111000");
??????????? hash.Add("%", "100101000");
??????????? hash.Add("$", "010101000");
??????????? hash.Add("*", "001101000");

??????????? return hash;
??????? }
??? }
}

調用的方法:

? protected void Page_Load(object sender, EventArgs e)
??? ...{
??????? CODE39DrawImageBord dr = new CODE39DrawImageBord("*3949178*");
??????? dr.Draw(Response.OutputStream);

??? }
--顯示結果:

--顯示結果:

補充說明:

生成的這個條碼,并沒有用掃描槍去識別,
以后我會用Symbol DS6608數字掃描器來識別它的準確性.

轉載于:https://www.cnblogs.com/host-2008/archive/2011/04/09/2010186.html

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