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qrcode生成二维码图片

2024-09-05 03:36:57   219人阅读

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using ThoughtWorks.QRCode.Codec.Util;
using System.IO;
using System.Text;
using System.Net;
using System.Drawing;
using System.Drawing.Drawing2D;

public partial class 测试 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Button1.Click+=Button1_Click;
    }

    void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            string mypath = "";
            //创建新对象
            QRCodeEncoder qr = new QRCodeEncoder();
            //字节：文字，英文，数字都可以
            qr.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qr.QRCodeScale = 3;//尺寸
            qr.QRCodeVersion = 5;//点数
            qr.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//容错率

            string data = http://www.mamicode.com/TextBox1.Text.ToString();//要转换成二维码的信息
            System.Drawing.Bitmap img = qr.Encode(data);
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            string path = mypath + "img/";//data.Trim().ToString()、Guid.NewGuid().ToString()
            string tempname = data.Trim().ToString() + ".png";//图片名称
            Directory.CreateDirectory(Server.MapPath(path));
            FileStream fs = new FileStream(Server.MapPath(path + tempname), FileMode.CreateNew, FileAccess.ReadWrite);
            BinaryWriter bw = new BinaryWriter(fs, UTF8Encoding.UTF8);
            byte[] by = ms.ToArray();
            for (int i = 0; i < ms.ToArray().Length; i++)
            {
                bw.Write(by[i]);
            }
            fs.Close();
            Image1.Src = path + tempname;
        }
        catch { }

    }
}

 

bin文件夹需要添加的文件：ThoughtWorks.QRCode.dll 和 ThoughtWorks.QRCode.pdb

前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ceshi.aspx.cs" Inherits="测试" %>

<!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:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        &nbsp;&nbsp;
        <asp:Button ID="Button1" runat="server" Text="生成二维码及相关信息" OnClick="Button1_Click"/>
        <br /><br />
        <div style="width: 500px; height: 200px;border:1px solid gray;">
            <img id="Image1" src=http://www.mamicode.com/"" runat="server" />
        </div>
    </form>
</body>
</html>

后台：

 

qrcode生成二维码图片


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