C# QR二维码制作

多个二维码下载

for(int i=0;i<20;i++){
	Dictionary<string, Stream> myDictionary = new Dictionary<string, Stream>();
	string QR = "show QR info"+i;
	string head = "XiaoPOooo"+i+".jpg";
	Bitmap bt = new Bitmap(280, 280);
	string enCodeString = QR;
	QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
	bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
	qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
	qrCodeEncoder.QRCodeScale = 10;
	qrCodeEncoder.QRCodeVersion = 0;
	qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
	qrCodeEncoder.QRCodeBackgroundColor = Color.Black;
	qrCodeEncoder.QRCodeForegroundColor = Color.White;
	System.IO.MemoryStream ms = new System.IO.MemoryStream();
	bt.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
	Stream stream = new MemoryStream(ms.ToArray());
	myDictionary.Add(head, stream);
}
this.Response.ContentType = "application/octet-stream";
string strFileNameEncode = HttpUtility.UrlEncode("QR包" + ".zip");
this.Response.AddHeader("Content-Disposition", "attachment; filename=" + strFileNameEncode);
Encoding encoding = Encoding.GetEncoding("Shift-JIS");
// 打包
this.Response.BinaryWrite(ZipPackage(myDictionary).ToArray());
this.Response.Flush();
this.Response.End();

其中ZipPackage()方法如下

static MemoryStream ZipPackage(Dictionary<string, Stream> streams)
    {
        byte[] buffer = new byte[6500];
        MemoryStream returnStream = new MemoryStream();
        var zipMs = new MemoryStream();
        using (ZipOutputStream zipStream = new ZipOutputStream(zipMs))
        {
            zipStream.SetLevel(9);
            foreach (var kv in streams)
            {
                string fileName = kv.Key;
                using (var streamInput = kv.Value)
                {
                    zipStream.PutNextEntry(new ZipEntry(fileName));
                    while (true)
                    {
                        var readCount = streamInput.Read(buffer, 0, buffer.Length);
                        if (readCount > 0)
                        {
                            zipStream.Write(buffer, 0, readCount);
                        }
                        else
                        {
                            break;
                        }
                    }
                    zipStream.Flush();
                }
            }
            zipStream.Finish();
            zipMs.Position = 0;
            zipMs.CopyTo(returnStream, 5600);
        }
        returnStream.Position = 0;
        return returnStream;
    }

单个二维码下载

	string QR = "show QR info";
	string head = "XiaoPOooo.jpg";
	Bitmap bt = new Bitmap(280, 280);
	string enCodeString = QR;
	QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
	bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
	qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
	qrCodeEncoder.QRCodeScale = 10;
	qrCodeEncoder.QRCodeVersion = 0;
	qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
	qrCodeEncoder.QRCodeBackgroundColor = Color.Black;
	qrCodeEncoder.QRCodeForegroundColor = Color.White;
	System.IO.MemoryStream ms = new System.IO.MemoryStream();
	bt.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
	this.Response.ContentType = "application/octet-stream";
    string strFileNameEncode = HttpUtility.UrlEncode(head + ".jpg");
    this.Response.AddHeader("Content-Disposition", "attachment; filename=" + strFileNameEncode);
    Encoding encoding = Encoding.GetEncoding("Shift-JIS");
    this.Response.BinaryWrite(ms.ToArray());
    this.Response.Flush();
    this.Response.End();