.net在网页中生成二维码和条形码

二维码:


1.下载ThoughtWorks.QRCode.dll文件

2.创建Web项目,添加引用刚才下载的文件

3.在项目中添加aspx窗体,编写代码如下

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="SAOMADemo.aspx.cs" Inherits="_0729Test.SAOMADemo" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:Image ID="Image1" runat="server" Height="192px" Width="249px"  />
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="生成二维码" />
        <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="生成条形码" />
    </div>
    </form>
</body>
</html>

4.编写aspx后台代码

using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ThoughtWorks.QRCode.Codec;

namespace _0729Test
{
    public partial class SAOMADemo : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        //二维码
        public void create_two(string nr)
        {
            Bitmap bt;
            string enCodeString = nr;
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
            Random r = new Random();
            int rd = r.Next(0, 9999) * 8888;

            string filename = string.Format(rd.ToString()) + ".jpg";
            filename = filename.Replace(" ", "");
            filename = filename.Replace(":", "");
            filename = filename.Replace("-", "");
            filename = filename.Replace(".", "");
            bt.Save(Server.MapPath("img/") + filename + ".jpg");
            this.Image1.ImageUrl = "img/" + filename + ".jpg";
        }

        //生成二维码
        protected void Button1_Click(object sender, EventArgs e)
        {
            create_two(this.TextBox1.Text.Trim());
        }
    }
}

  条形码:

1.在项目中添加Code39类,用于生成条码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Collections;
namespace _0705Test
{
    public class Code39
    {
        private Hashtable m_Code39 = new Hashtable();
        ;
        /// <summary>
        /// 放大倍数
        /// </summary>
        public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
        ;
        /// <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; } }

        public Code39()
        {
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            m_Code39.Add(");
            //m_Code39.Add("contentquot;, "1001001001010");
            m_Code39.Add(");
            m_Code39.Add(");
        }
        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();
                    ; i != _ValueChar.Length; i++)
                    {
                         && ()
                        {
                            _ValueText += "+" + _ValueChar[i].ToString().ToUpper();
                        }
                        else
                        {
                            _ValueText += _ValueChar[i].ToString();
                        }
                    }
                    break;
            }
            _ValueChar = _ValueText.ToCharArray();
            if (p_StarChar == true) _CodeText += m_Code39["*"];
            ; 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 = ), (int)m_Height);
            Graphics _Garphics = Graphics.FromImage(_CodeImage);
            _Garphics.FillRectangle(Brushes.White, , , _CodeImage.Width, _CodeImage.Height));
            ;
            ; i != _Value.Length; i++)
            {
                ;
                ')
                {
                    _Garphics.FillRectangle(Brushes.Black, , _DrawWidth, m_Height));
                }
                else
                {
                    _Garphics.FillRectangle(Brushes.White, , _DrawWidth, m_Height));
                }
                _LenEx += _DrawWidth;
            }

            _Garphics.Dispose();
            return _CodeImage;
        }
        /// <summary>
        /// 绘制文字
        /// </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);
            )
            {
                _Graphics.Dispose();
                return;
            }
            int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height;
            _Graphics.FillRectangle(Brushes.White, , _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));
            ;
            _Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);
            _Graphics.Dispose();
        }
    }
    }

2.在项目中添加一般处理程序,编写代码如下

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Web;
using _0729Test;
using _0705Test;
namespace _0729Test
{
    /// <summary>
    /// TiaoMa 的摘要说明
    /// </summary>
    public class TiaoMa : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string OrderNo = context.Request.Params["OrderNo"];
            _0705Test.Code39 _Code39 = new Code39();
            _Code39.Height = ;
            _Code39.Magnify = ;
            _Code39.ViewFont = );
            System.Drawing.Image _CodeImage = _Code39.GetCodeImage(OrderNo, Code39.Code39Model.Code39Normal, true);
            System.IO.MemoryStream _Stream = new System.IO.MemoryStream();
            _CodeImage.Save(_Stream, System.Drawing.Imaging.ImageFormat.Jpeg);
            context.Response.ContentType = "image/tiff";
            context.Response.Clear();
            context.Response.BufferOutput = true;
            context.Response.BinaryWrite(_Stream.GetBuffer());
            context.Response.Flush();
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

4.在button2的click事件写上:

protected void Button2_Click(object sender, EventArgs e)
{
this.Image1.ImageUrl = "/TiaoMa.ashx?OrderNo=" + this.TextBox1.Text.Trim().ToString();
}

5.我也忘了当时为什么不写在一个页面里,加个一般处理程序了,好像是点第二个按钮没反应。。  我写到一个页面中试一下

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