//二维码下面+文字
public static Bitmap AddStringUnderQR(Image qrImg, List <string> textList, int leftOffset = 0)
{
if (textList == null)
{
return(new Bitmap(qrImg));
}
Bitmap bkImg = new Bitmap(qrImg.Width, qrImg.Height + 50 * textList.Count);
bkImg = ImgHelper.CombineImageToTop(bkImg, qrImg);
//添加文字
using (Graphics g = Graphics.FromImage(bkImg))
{
int height = qrImg.Height;
foreach (string s in textList)
{
Font font = new Font("微软雅黑", 32, GraphicsUnit.Pixel);
SolidBrush b = new SolidBrush(Color.Black);
g.DrawString(s, font, b, new PointF(2 + leftOffset, height + 2));
height += font.Height + 2;
}
}
return(bkImg);
}
/// <summary>
/// 为QR添加背景
/// </summary>
public static void AddBKForQR(string bkAddr, string QrAddr, string finalFileAddr)
{
Bitmap bkImg = new Bitmap(bkAddr);
Image qrImg = Image.FromFile(QrAddr);
Bitmap finImg = ImgHelper.CombineImageToCenter(bkImg, qrImg);
finImg.Save(finalFileAddr);
finImg.Dispose();
qrImg.Dispose();
}
//为QR添加Logo
public static void AddLogoForQR(string logoUrl, Bitmap qrBitmap, string saveFilePath, List <string> text = null, int width = 132, int height = 132)
{
var LogoImg = ImgHelper.GetImgFromUrl(logoUrl);
LogoImg = ImgHelper.resizeImage(LogoImg, new Size(width, height));
LogoImg = ImgHelper.AddImgBorder(new Bitmap(LogoImg), 8, Color.Wheat);
LogoImg = ImgHelper.DrawTransparentRoundCornerImage(LogoImg, 20);
Bitmap finImg = ImgHelper.CombineImageToCenter(qrBitmap, LogoImg);
if (text != null)
{
finImg = AddStringUnderQR(finImg, text);
}
finImg.Save(saveFilePath);
finImg.Dispose();
LogoImg.Dispose();
}