先引用 using ZXing;
/// <summary>
/// 生成二维码,保存成图片
/// </summary>
/// <param name="path">保存的路径</param>
/// <param name="text">内容</param>
static void Generate1(string path,string text)
{
BarcodeWriter writer = new BarcodeWriter();
writer.Format = BarcodeFormat.QR_CODE;
QrCodeEncodingOptions options = new QrCodeEncodingOptions();
options.DisableECI = true;
//设置内容编码
options.CharacterSet = "UTF-8";
//设置二维码的宽度和高度
options.Width = 500;
options.Height = 500;
//设置二维码的边距,单位不是固定像素
options.Margin = 1;
writer.Options = options;
Bitmap map = writer.Write(text);
string filename = Path.Combine(path, "Generate1.png");
map.Save(filename, ImageFormat.Png);
map.Dispose();
}
/// <summary>
/// 生成条形码
/// </summary>
/// <param name="path">保存路径</param>
/// <param name="text">内容</param>
static void Generate2(string path,string text)
{
BarcodeWriter writer = new BarcodeWriter();
//使用ITF 格式,不能被现在常用的支付宝、微信扫出来
//如果想生成可识别的可以使用 CODE_128 格式
//writer.Format = BarcodeFormat.ITF;
writer.Format = BarcodeFormat.CODE_128;
EncodingOptions options = new EncodingOptions()
{
Width = 150,
Height = 50,
Margin = 2
};
writer.Options = options;
Bitmap map = writer.Write(text);
string filename = Path.Combine(path, "generate2.png");
map.Save(filename, ImageFormat.Png);
}
/// <summary>
/// 读取二维码/条形码
/// 读取失败,返回空字符串
/// </summary>
/// <param name="filename">指定二维码图片位置</param>
static string Read1(string filename)
{
BarcodeReader reader = new BarcodeReader();
reader.Options.CharacterSet = "UTF-8";
Bitmap map = new Bitmap(filename);
Result result = reader.Decode(map);
return result == null ? "" : result.Text;
}
/// <summary>
/// 生成带Logo的二维码
/// </summary>
/// <param name="path">保存路径</param>
/// <param name="logofile">logo文件</param>
/// <param name="text">内容</param>
static void Generate3(string path,string logofile,string text)
{
//Logo 图片
Bitmap logo = new Bitmap(logofile);
//构造二维码写码器
MultiFormatWriter writer = new MultiFormatWriter();
Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//生成二维码
BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, 300, 300, hint);
BarcodeWriter barcodeWriter = new BarcodeWriter();
Bitmap map = barcodeWriter.Write(bm);
//获取二维码实际尺寸(去掉二维码两边空白后的实际尺寸)
int[] rectangle = bm.getEnclosingRectangle();
//计算插入图片的大小和位置
int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
int middleL = (map.Width - middleW) / 2;
int middleT = (map.Height - middleH) / 2;
//将img转换成bmp格式,否则后面无法创建Graphics对象
Bitmap bmpimg = new Bitmap(map.Width, map.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(map, 0, 0);
}
//将二维码插入图片
Graphics myGraphic = Graphics.FromImage(bmpimg);
//白底
myGraphic.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
myGraphic.DrawImage(logo, middleL, middleT, middleW, middleH);
//保存成图片
string filename = Path.Combine(path, "Generate3.png");
bmpimg.Save(filename, ImageFormat.Png);
bmpimg.Dispose();
}