asp.net(C#)利用QRCode生成二维码---.NET菜鸟的成长之路

时间：2023-03-09 03:31:10
asp.net(C#)利用QRCode生成二维码---.NET菜鸟的成长之路 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="QRCode.aspx.cs" Inherits="QRCode" %>  

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title>生成二维码</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>

    <div style="text-align:center">

        <asp:Image ID="ImageCode" runat="server" Visible="false" />

    </div>

    </form>

</body>

</html>  
using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;  

public partial class QRCode : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {  

    }  

    protected void Button1_Click(object sender, EventArgs e)

    {

        string CodeText = TextBox1.Text.Trim();

        if (!string.IsNullOrEmpty(CodeText))

        {

            ImageCode.Visible = true;

            ImageCode.ImageUrl = "GetQRCode.ashx?CodeText=" + CodeText;

        }

    }

}  
<%@ WebHandler Language="C#" Class="GetQRCode" %>  

using System;

using System.Web;  

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

using System.IO;

using System.Text;  

public class GetQRCode : IHttpHandler {  

    public void ProcessRequest (HttpContext context) {  

        String data = context.Request["CodeText"];

        if (!string.IsNullOrEmpty(data))

        {

            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

            qrCodeEncoder.QRCodeScale = ;

            qrCodeEncoder.QRCodeVersion = ;

            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

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

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

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

            context.Response.ClearContent();

            context.Response.ContentType = "image/Png";

            context.Response.BinaryWrite(MStream.ToArray());

        }  

        context.Response.Flush();

        context.Response.End();

    }  

    public bool IsReusable {

        get {

            return false;

        }

    }

}

续集：

<%@ WebHandler Language="C#" Class="GetQRCode" %>  

using System;

using System.Web;  

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

using System.IO;

using System.Text;

using System.Drawing;

using System.Drawing.Drawing2D;  

public class GetQRCode : IHttpHandler

{  

    public void ProcessRequest(HttpContext context)

    {  

        String data = context.Request["CodeText"];

        if (!string.IsNullOrEmpty(data))

        {

            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

            qrCodeEncoder.QRCodeScale = 4;

            qrCodeEncoder.QRCodeVersion = 8;

            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

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

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

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

            System.IO.MemoryStream MStream1 = new System.IO.MemoryStream();

            CombinImage(image, context.Server.MapPath("~/images/201292891051540.jpg")).Save(MStream1, System.Drawing.Imaging.ImageFormat.Png);

            context.Response.ClearContent();

            context.Response.ContentType = "image/png";

            context.Response.BinaryWrite(MStream1.ToArray());  

            //image.Dispose();

            MStream.Dispose();

            MStream1.Dispose();

        }  

        context.Response.Flush();

        context.Response.End();

    }  

    /// <summary>

    /// 调用此函数后使此两种图片合并，类似相册，有个

    /// 背景图，中间贴自己的目标图片

    /// </summary>

    /// <param name="imgBack">粘贴的源图片</param>

    /// <param name="destImg">粘贴的目标图片</param>

    public static Image CombinImage(Image imgBack, string destImg)

    {

        Image img = Image.FromFile(destImg);        //照片图片

        if (img.Height != 65 || img.Width != 65)

        {

            img = KiResizeImage(img, 65, 65, 0);

        }

        Graphics g = Graphics.FromImage(imgBack);  

        g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高);     

        //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框    

        //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);    

        g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2, img.Width, img.Height);

        GC.Collect();

        return imgBack;

    }  

    /// <summary>

    /// Resize图片

    /// </summary>

    /// <param name="bmp">原始Bitmap</param>

    /// <param name="newW">新的宽度</param>

    /// <param name="newH">新的高度</param>

    /// <param name="Mode">保留着，暂时未用</param>

    /// <returns>处理以后的图片</returns>

    public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)

    {

        try

        {

            Image b = new Bitmap(newW, newH);

            Graphics g = Graphics.FromImage(b);

            // 插值算法的质量

            g.InterpolationMode = InterpolationMode.HighQualityBicubic;

            g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);

            g.Dispose();

            return b;

        }

        catch

        {

            return null;

        }

    }  

    public bool IsReusable

    {

        get

        {

            return false;

        }

    }

}

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