.NET条形码

作者：佚名 ASP.NET网站开发编辑：admin 更新时间：2022-07-23

.NET条形码

建议不要用CODE-39码，改用CODE-128码；

CODE-39码密度比较低，条码数字内容太多，导致条码太长，缩短长度就只能减小X尺寸，造成识读困难；

CODE-128码密度高，相同的数字生成条码更短。

你可以对比一下图中的两个条码，上面是CODE-39，下面是CODE-128，相同的内容：

解决方案：

Default.aspx

 1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="BarcodeTest.Default" %> 2  3 <!DOCTYPE html> 4  5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 8     <title>条形码</title> 9     <script type="text/javascript" src="jquery-latest.min.js"></script>10     <script type="text/Javascript">11         $(function () {12             $("#btnBar").click(function () {13                 var rawData = $.trim($("#txtRawData").val());14                 $("#imgBarcode").attr("src", "BarcodeHandler.ashx?RawData=" + rawData + "&BarHeight=50&BarcodeType=" + $("#ddlBarcodeType").val()15                     + "&IsDisplayFontData=" + ($("#cbIsDisplayFontData").attr("checked") == "checked") + "&FontSize=" + $("#txtFontSize").val() + "&FontAlignment=" + $("#ddlFontAlignment").get(0).selectedIndex);16             });17         });18     </script>19 </head>20 <body>21     <form id="form1" runat="server">22         <div>23             原始码：24             <input type="text" id="txtRawData" maxlength="48" value="BJ-BJSJF-GCSG-0004-HTFY00002" />25             <br />26             编码选择：<select id="ddlBarcodeType"><option>Auto</option>27                 <option>A</option>28                 <option>B</option>29                 <option>C</option>30             </select>31         </div>32         <br />33         字体大小：<input type="text" id="txtFontSize" value="16" />字体布局：<select id="ddlFontAlignment"><option>Near</option>34             <option selected="selected">Center</option>35             <option>Far</option>36         </select><input checked="checked" type="checkbox" id="cbIsDisplayFontData" />字体显示37         <div>38             <input type="button" id="btnBar" value="生成条形码" />39         </div>40         <div style="text-align: center;">41             <img id="imgBarcode" src="" alt="条形码" />42         </div>43     </form>44 </body>45 </html>

BarcodeHandler.ashx

 1 using Barcode; 2 using System; 3 using System.Collections.Generic; 4 using System.Linq; 5 using System.Web; 6  7 namespace BarcodeTest 8 { 9     /// <summary>10     /// author: Kenmu11     /// created by: 2014-11-0612     /// function: 条形码生成13     /// </summary>14     public class BarcodeHandler : IHttpHandler15     {16 17         public void PRocessRequest(HttpContext context)18         {19             HttpRequest request = context.Request;20             HttpResponse response = context.Response;21             response.ClearContent();22             response.ContentType = "image/jpeg";23 24             string barcodeType = request["BarcodeType"] ?? "Auto";25             string rawData = request["RawData"] ?? ((char)20).ToString() + @"123a" + ((char)18).ToString() + "ab";26             byte barHeight = byte.Parse(string.IsNullOrEmpty(request["BarHeight"]) ? "32" : request["BarHeight"]);27             bool isDisplayFontData = string.IsNullOrEmpty(request["IsDisplayFontData"]) ? true : bool.Parse(request["IsDisplayFontData"]);28             int fontSize = string.IsNullOrEmpty(request["FontSize"]) ? 16 : int.Parse(request["FontSize"]);29             int fontAlignment = string.IsNullOrEmpty(request["FontAlignment"]) ? 1 : int.Parse(request["FontAlignment"]);//0（Near左）、1（Center中）、2（Far右）30             BaseCode128 code128;31             switch (barcodeType)32             {33                 case "A":34                     code128 = new Code128A(rawData);35                     break;36                 case "B":37                     code128 = new Code128B(rawData);38                     break;39                 case "C":40                     code128 = new Code128C(rawData);41                     break;42                 case "Auto":43                 default:44                     code128 = new Code128Auto(rawData);45                     break;46             }47             code128.BarHeight = barHeight;48             code128.IsDisplayFontData = isDisplayFontData;49             code128.FontSize = fontSize;50             code128.FontAlignment = (System.Drawing.StringAlignment)fontAlignment;51 52             System.Drawing.Image img = code128.GetBarCodeImage();53             img.Save(response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);54             img.Dispose();55         }56 57         public bool IsReusable58         {59             get60             {61                 return false;62             }63         }64     }65 }

CharacterSet.cs

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5  6 //author: Kenmu 7 //created by: 2014-11-05 8 //function: 条形码 9 namespace Barcode10 {11     /// <summary>  12     /// Code128字符集  13     /// </summary>  14     internal enum CharacterSet15     {16         A,17         B,18         C19     } 20 }

IBarCode.cs

 1 using System; 2 using System.Collections.Generic; 3 using System.Drawing; 4 using System.Linq; 5 using System.Text; 6  7 //author: Kenmu 8 //created by: 2014-11-05 9 //function: 条形码10 namespace Barcode11 {12     /// <summary>  13     /// 条形码接口  14     /// </summary> 15     public interface IBarCode16     {17         string RawData { get; }18         /// <summary>  19         /// 条形码对应的数据  20         /// </summary>  21         string EncodedData { get; }22         /// <summary>  23         /// 当前条形码标准  24         /// </summary>  25         string BarCodeType { get; }26 27         /// <summary>  28         /// 得到条形码对应的图片  29         /// </summary>  30         /// <returns></returns>  31         Image GetBarCodeImage();32     }33 }

BaseCode128.cs

  1 using System;  2 using System.Collections.Generic;  3 using System.Linq;  4 using System.Text;  5 using System.Drawing;  6   7 //author: Kenmu  8 //created by: 2014-11-06  9 //function: 条形码 10 namespace Barcode 11 { 12     /// <summary>   13     /// BaseCode128抽象类   14     /// </summary>   15     public abstract class BaseCode128 : IBarCode 16     { 17         protected Color backColor = Color.White;//条码背景色   18         protected Color barColor = Color.Black;//条码和原始数据字体颜色 19          20         /// <summary>   21         /// 当前条形码种类 22         /// </summary>   23         public string BarCodeType 24         { 25             get { return System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name; } 26         } 27  28         /// <summary>   29         /// 条形码对应的编码数据   30         /// </summary> 31         protected string _EncodedData; 32         public string EncodedData 33         { 34             get { return this._EncodedData; } 35         } 36  37         /// <summary>   38         /// 【原始数据】 39         /// </summary> 40         protected string _RawData; 41         public string RawData 42         { 43             get { return this._RawData; } 44         } 45  46         /// <summary>   47         /// 在条形码下面显示数据；如果为空，则取【原始数据】   48         /// </summary> 49         protected string _PresentationData = null; 50         public string PresentationData 51         { 52             get { return string.IsNullOrEmpty(this._PresentationData) ? this._RawData : this._Present

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