ASP.NET生成二维码

2022-11-10 15:55:26

下面使用ThoughtWorks.QRCode.dll这个类库，实现生成二维码

使用时需要增加:下面三个命名空间

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

下面代码主要是在asp.net中，生成一张二维码图片，在网页中显示，而且，将二维码图片保存在了，D：\zlf\zz。png；

C# 代码复制


using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Drawing.Imaging;

using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using ThoughtWorks.QRCode.Codec.Util;
using System.IO;
using System.Text;

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

        qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

        qrCodeEncoder.QRCodeScale = 4;

        qrCodeEncoder.QRCodeVersion = 8;

        qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

        //String data = "Hello 二维码！";
        String data = TextBox1.Text.ToString();
        Response.Write(data);

        System.Drawing.Bitmap image = qrCodeEncoder.Encode(data);

        System.IO.MemoryStream MStream = new System.IO.MemoryStream();

        image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);

        Response.ClearContent();

        Response.ContentType = "image/Png";

        Response.BinaryWrite(MStream.ToArray());

        //FileInfo f = new FileInfo(@"d:\\zl.png");
        Directory.CreateDirectory("d:\\\\zlf");
        FileStream fs = new FileStream("d:\\\\zlf\\\\zz。png", FileMode.CreateNew, FileAccess.ReadWrite);

        BinaryWriter bw = new BinaryWriter(fs, UTF8Encoding.UTF8);
        byte[] by = MStream.ToArray();
        for (int i = 0; i < MStream.ToArray().Length; i++)
            bw.Write(by[i]);
        fs.Close();

    }
}

aspx页面代码

HTML 代码复制


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

<html>
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        请输入内容：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <br/>
        <asp:Button ID="Button1" runat="server" Text="生成二维码" onclick="Button1_Click" />
    </div>
    </form>
</body>
</html>

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