Nuget安装ZXing.Net,帮助类:
using System;使用方法一(保存为文件流):
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;
namespace CommonHelper
{
public class BarcodeHelper
{
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="text">内容</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <returns></returns>
public static Bitmap Generate1(string text, int width, int height)
{
BarcodeWriter writer = new BarcodeWriter();
writer.Format = BarcodeFormat.QR_CODE;
QrCodeEncodingOptions options = new QrCodeEncodingOptions()
{
DisableECI = true,//设置内容编码
CharacterSet = "UTF-8", //设置二维码的宽度和高度
Width = width,
Height = height,
Margin = 1//设置二维码的边距,单位不是固定像素
};
writer.Options = options;
Bitmap map = writer.Write(text);
return map;
}
/// <summary>
/// 生成一维条形码
/// </summary>
/// <param name="text">内容</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
/// <returns></returns>
public static Bitmap Generate2(string text, int width, int height)
{
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_39;
EncodingOptions options = new EncodingOptions()
{
Width = width,
Height = height,
Margin = 2
};
writer.Options = options;
Bitmap map = writer.Write(text);
return map;
}
/// <summary>
/// 生成带Logo的二维码
/// </summary>
/// <param name="text">内容</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
public static Bitmap Generate3(string text, int width, int height)
{
//Logo 图片
string logoPath = System.AppDomain.CurrentDomain.BaseDirectory + @"\img\logo.png";
Bitmap logo = new Bitmap(logoPath);
//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);
//hint.Add(EncodeHintType.MARGIN, 2);//旧版本不起作用,需要手动去除白边
//生成二维码
BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, width + 30, height + 30, hint);
bm = deleteWhite(bm);
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), logo.Width);
int middleH = Math.Min((int)(rectangle[3] / 3), logo.Height);
int middleL = (map.Width - middleW) / 2;
int middleT = (map.Height - middleH) / 2;
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, width, height);
//白底将二维码插入图片
g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
g.DrawImage(logo, middleL, middleT, middleW, middleH);
}
return bmpimg;
}
/// <summary>
/// 删除默认对应的空白
/// </summary>
/// <param name="matrix"></param>
/// <returns></returns>
private static BitMatrix deleteWhite(BitMatrix matrix)
{
int[] rec = matrix.getEnclosingRectangle();
int resWidth = rec[2] + 1;
int resHeight = rec[3] + 1;
BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
resMatrix.clear();
for (int i = 0; i < resWidth; i++)
{
for (int j = 0; j < resHeight; j++)
{
if (matrix[i + rec[0], j + rec[1]])
resMatrix[i, j] = true;
}
}
return resMatrix;
}
}
}
public ActionResult GenerateBarCode(string contents)使用方法二(保存为文件):
{
MemoryStream ms = new MemoryStream();
Bitmap bitmap = BarcodeHelper.Generate2(contents, 270, 50);
Graphics g = Graphics.FromImage(bitmap);
bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
g.Dispose();
bitmap.Dispose();
return File(ms.ToArray(), "image/jpeg");
}
/// <summary>页而调用:
/// 生成条形码
/// </summary>
/// <param name="code"></param>
/// <returns></returns>
public static string GenerateBarCode(string contents)
{
string fileName = AppDomain.CurrentDomain.BaseDirectory + "BarCode\\" + Guid.NewGuid().ToString() + ".jpg";
fileName = fileName.Replace("\\bin\\Debug", "");
MemoryStream ms = new MemoryStream();
Bitmap bitmap = BarcodeHelper2.Generate2(contents, 270, 50);
Graphics g = Graphics.FromImage(bitmap);
bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
g.Dispose();
bitmap.Dispose();
using (FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write))
{
byte[] buffer = ms.ToArray();//转化为byte格式存储
fs.Write(buffer, 0, buffer.Length);
fs.Flush();
buffer = null;
}
return fileName;
}
- 本文标题: NETCore生成二维码、条形码、带logo的二维码
- 文章分类:【.NET/Web】
- 非特殊说明,本文版权归【胡同里的砖头】个人博客 所有,转载请注明出处.