CmsWeb/api/wxpay/MakeQRCode.aspx.cs

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using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Text;
using ThoughtWorks;
using ThoughtWorks.QRCode;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;

public partial class api_wxpay_MakeQRCode : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!string.IsNullOrEmpty(Request.QueryString["data"]))
        {
            string str = Request.QueryString["data"];

            //初始化二维码生成工具
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            qrCodeEncoder.QRCodeVersion = 0;
            qrCodeEncoder.QRCodeScale = 4;

            //将字符串生成二维码图片
            Bitmap image = qrCodeEncoder.Encode(str, Encoding.Default);

            //保存为PNG到内存流  
            MemoryStream ms = new MemoryStream();
            image.Save(ms, ImageFormat.Png);

            //输出二维码图片
            Response.BinaryWrite(ms.GetBuffer());
            Response.End();
        }
    }
}