.net生成二维码

把链接生成二维码，代码如下：

　　public void ResImg()
    {
        string contents = "http://www.baidu.com";
        Bitmap bmp = GeneratorQrImage(contents);
        MemoryStream ms = new MemoryStream();
        bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
        byte[] arr = new byte[ms.Length];
        ms.Position = 0;
        ms.Read(arr, 0, (int)ms.Length);
        ms.Close();
        Response.Clear();
        Response.ContentType = "image/gif";
        Response.OutputStream.Write(arr, 0, arr.Length);
        Response.End();
    }