C#生成二维码

首先引用ThoughtWorks.QRCode.dll

代码：

using System;
 System.Collections.Generic;
 System.Linq;
 System.Text;
 System.Drawing;
 ThoughtWorks.QRCode.Codec;

namespace QRCodeUtil
{
    /// <summary>
    /// 二维码生成
    </summary>
    public class QRCodeHelper
    {
        #region 根据链接获取二维码
        <summary>
         根据链接获取二维码
        </summary>
        <param name="link">链接</param>
        <returns>返回二维码图片</returns>
        static Bitmap GetQRCodeBmp(string link)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodemode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeScale = 4;
            qrCodeEncoder.QRCodeVersion = 0;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            Bitmap bmp = qrCodeEncoder.Encode(link);

            return bmp;
        }
        #endregion

    }
}

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使用示例：

 System.Web;
 System.Web.UI;
 System.Web.UI.WebControls;
 QRCodeUtil;

 SWX
{
    partial  WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender,EventArgs e)
        {
            Bitmap bmp = QRCodeHelper.GetQRCodeBmp(@"http://www.baidu.com/");
            string str = HttpContext.Current.Request.MapPath("\\aa.bmp);
            bmp.Save(str);
        }
    }
}

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