QR二維碼生成器原始碼(中間可插入小圖片)
阿新 • • 發佈:2019-02-16
//構造二維碼寫碼器
MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();
Hashtable hint=new Hashtable();
hint.Add(EncodeHintType.CHARACTER_SET,"UTF-8");
hint.Add(EncodeHintType.ERROR_CORRECTION,com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.H);
//生成二維碼
ByteMatrix bm = mutiWriter.encode(txtMsg.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300,hint);
Bitmap img = bm.ToBitmap();
//要插入到二維碼中的圖片
Image middlImg = QRMiddleImg.Image;
//獲取二維碼實際尺寸(去掉二維碼兩邊空白後的實際尺寸)
System.Drawing.Size realSize = mutiWriter.GetEncodeSize(txtMsg.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300 , 300);
//計算插入圖片的大小和位置
int middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);
int middleImgH = Math.Min((int)(realSize.Height / 3.5),middlImg.Height);
int middleImgL = (img.Width - middleImgW) / 2;
int middleImgT = (img.Height - middleImgH) / 2 ;
//將img轉換成bmp格式,否則後面無法建立 Graphics物件
Bitmap bmpimg = new Bitmap(img.Width, img.Height,System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bmpimg))
{
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.DrawImage(img, 0, 0);
}
//在二維碼中插入圖片
System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);
//白底
MyGraphic.FillRectangle(Brushes.White,middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);
pictureBox1.Image = bmpimg;
//自動儲存圖片到當前目錄
string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";
bmpimg.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
lbshow.Text = "圖片已儲存到:" + filename;