public static System.Drawing.Bitmap Create(string content, System.Drawing.Image centralImage)
{
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
System.Collections.Hashtable hashtable = new System.Collections.Hashtable();
hashtable.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
hashtable.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
ByteMatrix byteMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 300, 300, hashtable);
System.Drawing.Bitmap bitmap = byteMatrix.ToBitmap();
System.Drawing.Size encodeSize = multiFormatWriter.GetEncodeSize(content, BarcodeFormat.QR_CODE, 300, 300);
int num = System.Math.Min((int)((double)encodeSize.Width / 3.5), centralImage.Width);
int num2 = System.Math.Min((int)((double)encodeSize.Height / 3.5), centralImage.Height);
int x = (bitmap.Width - num) / 2;
int y = (bitmap.Height - num2) / 2;
System.Drawing.Bitmap bitmap2 = new System.Drawing.Bitmap(bitmap.Width, bitmap.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(bitmap2))
{
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
graphics.DrawImage(bitmap, 0, 0);
}
System.Drawing.Graphics graphics2 = System.Drawing.Graphics.FromImage(bitmap2);
graphics2.FillRectangle(System.Drawing.Brushes.White, x, y, num, num2);
graphics2.DrawImage(centralImage, x, y, num, num2);
return(bitmap2);
}
public static string CreateQRCodePic(string info, string midImgPath, string saveDir, string fileName, ErrorCorrectionLevel ecLevel, int width = 300, int height = 300)
{
string QRImgPath = string.Empty;
if (string.IsNullOrEmpty(info))//要存储的信息不能为空，否则异常
{
return(QRImgPath);
}
try
{
MultiFormatWriter writer = new MultiFormatWriter();
//构造创建参数；
Hashtable hints = new Hashtable();
hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.Add(EncodeHintType.ERROR_CORRECTION, ecLevel);
Bitmap QRImg = writer.encode(info, BarcodeFormat.QR_CODE, width, height, hints).ToBitmap(); //生成不带图片的BitMap;
Image midImg = null;
if (!string.IsNullOrEmpty(midImgPath) && File.Exists(midImgPath) && legalExts.Contains(Path.GetExtension(midImgPath))) //验证图片存在且后缀名符合
{
try //确保即使中间图片加载失败也能生成无中间图的QR码
{
midImg = Image.FromFile(midImgPath);
}
catch { }
}
Bitmap bmpimg = new Bitmap(QRImg.Width, QRImg.Height, 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(QRImg, 0, 0);
}
if (midImg != null)
{
Size QRSize = writer.GetEncodeSize(info, BarcodeFormat.QR_CODE, width, height);
//计算中间图片大小和位置
int midImgW = Math.Min((int)(QRSize.Width * midImgScale), midImg.Width);
int midImgH = Math.Min((int)(QRSize.Height * midImgScale), midImg.Height);
int midImgL = (QRImg.Width - midImgW) / 2;
int midImgT = (QRImg.Height - midImgH) / 2;
Graphics myGraphic = System.Drawing.Graphics.FromImage(bmpimg);
myGraphic.FillRectangle(Brushes.White, midImgL, midImgT, midImgW, midImgH);
myGraphic.DrawImage(midImg, midImgL, midImgT, midImgW, midImgH);
myGraphic.Dispose();
midImg.Dispose();
}
if (!Directory.Exists(saveDir))
{
Directory.CreateDirectory(saveDir);
}
QRImgPath = Path.Combine(saveDir, fileName + ".jpg");
bmpimg.Save(QRImgPath, ImageFormat.Jpeg);
}
catch (Exception e) {
}
return(QRImgPath);
}
//带LOGO二维码
private void btnEncodePic_Click(object sender, EventArgs e)
{
labShow.Text = "";
string content = txtMsg.Text.Trim();
if (String.IsNullOrEmpty(content))
{
MessageBox.Show("请输入编码内容");
return;
}
try
{
//构造二维码编码器
MultiFormatWriter writer = new MultiFormatWriter();
Hashtable hints = new Hashtable();
hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);
//先生成二维码
ByteMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, 300, 300, hints);
Bitmap img = matrix.ToBitmap();
//再处理要插入到二维码中的图片
Image middlImg = QRMiddleImg.Image;
//获取二维码实际尺寸（去掉二维码两边空白后的尺寸）
Size realSize = writer.GetEncodeSize(content, BarcodeFormat.QR_CODE, 300, 300);
//计算插入的图片的大小和位置
int middleImgW = Math.Min((int)(realSize.Width / 4), middlImg.Width);
int middleImgH = Math.Min((int)(realSize.Height / 4), middlImg.Height);
int middleImgL = (img.Width - middleImgW) / 2;
int middleImgT = (img.Height - middleImgH) / 2;
//将img转换成bmp格式，否则后面无法创建 Graphics对象
Bitmap bmpimg = new Bitmap(img.Width, img.Height, 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);
}
//在二维码中插入图片
Graphics MyGraphic = Graphics.FromImage(bmpimg);
//白底
MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawString(content, this.Font, new SolidBrush(Color.Black), middleImgW * 2 + 20, 300 - middleImgH / 2);
pictureBox1.Image = bmpimg;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// 构建 二维码图片
/// </summary>
/// <param name="content">内容</param>
/// <param name="width">宽</param>
/// <param name="height">高</param>
/// <param name="midImg">中心图</param>
/// <returns></returns>
public static Bitmap Encode(string content, int width = 430, int height = 430, Image midImg = null)
{
//构造二维码写码器
var mutiWriter = new MultiFormatWriter();
var hint = new Hashtable
{
{ EncodeHintType.CHARACTER_SET, "UTF-8" },
{ EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.H }
};
//生成二维码
var bm = mutiWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hint);
var img = bm.ToBitmap();
if (midImg == null)
{
return(img);
}
var middlImg = midImg;
//获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
var realSize = mutiWriter.GetEncodeSize(content, BarcodeFormat.QR_CODE, width, height);
//计算插入图片的大小和位置
var middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);
var middleImgH = Math.Min((int)(realSize.Height / 3.5), middlImg.Height);
var middleImgL = (img.Width - middleImgW) / 2;
var middleImgT = (img.Height - middleImgH) / 2;
//将img转换成bmp格式，否则后面无法创建 Graphics对象
var bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (var 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);
};
//在二维码中插入图片
var MyGraphic = Graphics.FromImage(bmpimg);
//白底
MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);
return(bmpimg);
}
public static Bitmap Create(string content, Image centralImage)
{
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Hashtable hashtables = new Hashtable()
{
{ EncodeHintType.CHARACTER_SET, "UTF-8" },
{ EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H }
};
ByteMatrix byteMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 300, 300, hashtables);
Bitmap bitmap = byteMatrix.ToBitmap();
Image image = centralImage;
Size encodeSize = multiFormatWriter.GetEncodeSize(content, BarcodeFormat.QR_CODE, 300, 300);
int num = Math.Min((int)(encodeSize.Width / 3.5), image.Width);
int num1 = Math.Min((int)(encodeSize.Height / 3.5), image.Height);
int width = (bitmap.Width - num) / 2;
int height = (bitmap.Height - num1) / 2;
Bitmap bitmap1 = new Bitmap(bitmap.Width, bitmap.Height, PixelFormat.Format32bppArgb);
Graphics graphic = Graphics.FromImage(bitmap1);
try
{
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphic.SmoothingMode = SmoothingMode.HighQuality;
graphic.CompositingQuality = CompositingQuality.HighQuality;
graphic.DrawImage(bitmap, 0, 0);
}
finally
{
if (graphic != null)
{
graphic.Dispose();
}
}
Graphics graphic1 = Graphics.FromImage(bitmap1);
graphic1.FillRectangle(Brushes.White, width, height, num, num1);
graphic1.DrawImage(image, width, height, num, num1);
return(bitmap1);
}
