DEMOMySql/MicroServices/Business/Business.Core/Utilities/QRcodeHelper.cs

using SharpCompress.Common;
//using Spire.Barcode;
using Spire.Pdf;
using Spire.Pdf.Barcode;
using Spire.Pdf.Graphics;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ThoughtWorks.QRCode.Codec;
using static System.Formats.Asn1.AsnWriter;

namespace Business.Core.Utilities
{
    /// <summary>
    /// 二维码生成工具
    /// </summary>
    public class QRcodeHelper
    {
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="context">二维码内容</param>
        /// <param name="x">x轴偏移量</param>
        /// <param name="y">y轴偏移量</param>
        public void GenerateQrCode(string filePath, string context,int x,int y)
        {
            PdfDocument pdf = new PdfDocument();
            //读取文件
            pdf.LoadFromFile(filePath);
            PdfPageBase pb = pdf.Pages.Add();
            pdf.Pages.Remove(pb);

            //生成二维码
            QRCodeEncoder qRCode = new QRCodeEncoder();
            qRCode.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;          //编码方式(注意：BYTE能支持中文，ALPHA_NUMERIC扫描出来的都是数字)
            qRCode.QRCodeScale = 2;                                            //大小(值越大生成的二维码图片像素越高)-值越大，二维码图片越大
            qRCode.QRCodeVersion = 0;                                          //版本(注意：设置为0主要是防止编码的字符串太长时发生错误)
            qRCode.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;      //错误效验、错误更正(有4个等级)
            qRCode.QRCodeBackgroundColor = Color.White;                        //背景色
            qRCode.QRCodeForegroundColor = Color.Black;                        //前景色
            System.Drawing.Bitmap bt = qRCode.Encode(context, Encoding.UTF8);
            
            //循环每一页，绘制二维码图形到PDF
            PdfImage pdfImage = PdfImage.FromImage(bt);
            for (int i = 0; i < pdf.Pages.Count; i++)
            {
                var page = pdf.Pages[i];
                //位于页面右上角
                //page.Canvas.DrawImage(pdfImage, page.Size.Width - pdfImage.Width - 20, 10);
                //自定义位置
                page.Canvas.DrawImage(pdfImage, x, y);
            }
            //保存文档
            pdf.SaveToFile(filePath);
        }

        /// <summary>
        /// 生成条形码
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="context">挑衅码内容</param>
        /// <param name="x">x轴偏移量</param>
        /// <param name="y">y轴偏移量</param>
        public void GenerateBarcode(string filePath, string context, int x, int y)
        {
            PdfDocument pdf = new PdfDocument();
            //读取文件
            pdf.LoadFromFile(filePath);
            PdfPageBase pb = pdf.Pages.Add();
            pdf.Pages.Remove(pb);

            PdfCode39Barcode pdfCode = new PdfCode39Barcode(context);
            pdfCode.BarcodeToTextGapHeight = 2f;
            pdfCode.TextDisplayLocation = TextLocation.Bottom;
            pdfCode.BarHeight = 40;
            pdfCode.NarrowBarWidth = 0.5f;
            pdfCode.TextColor = Color.Black;

            //绘制二维码图形到PDF
            for (int i = 0; i < pdf.Pages.Count; i++)
            {
                var page = pdf.Pages[i];
                //位于页面底部中间
                //pdfCode.Draw(page, new Point((int)(page.Size.Width / 2 - pdfCode.Size.Width / 2), (int)(page.Size.Height - pdfCode.Size.Height)));
                //自定义位置
                pdfCode.Draw(page, new Point(x, y));
            }

            //保存文档
            pdf.SaveToFile(filePath);
        }

        #region spire.barcode生成二维码和条形吗
        ///// <summary>
        ///// 生成二维码
        ///// </summary>
        ///// <param name="filePath"></param>
        ///// <param name="context"></param>
        //public void GenerateQrCode(string filePath, string context)
        //{
        //    PdfDocument pdf = new PdfDocument();
        //    //读取文件
        //    pdf.LoadFromFile(filePath);
        //    PdfPageBase pb = pdf.Pages.Add();
        //    pdf.Pages.Remove(pb);

        //    //使用Spire.Barcode的BarcodeSettings和BarcodeGenerator类创建二维码图形
        //    Spire.Barcode.BarcodeSettings settings = new BarcodeSettings();
        //    settings.Type = BarCodeType.QRCode;
        //    settings.Data = context;
        //    settings.Data2D = context;
        //    settings.X = 0.7f;
        //    settings.LeftMargin = 0;
        //    settings.ShowText = false;
        //    settings.AutoResize=true;
        //    settings.ShowCheckSumChar = false;
        //    settings.QRCodeECL = QRCodeECL.Q;
        //    settings.QRCodeDataMode = QRCodeDataMode.Numeric;
        //    Spire.Barcode.BarCodeGenerator generator = new BarCodeGenerator(settings);
        //    Image image = generator.GenerateImage(new Size(20,20));

        //    //绘制二维码图形到PDF
        //    PdfImage pdfImage = PdfImage.FromImage(image);
        //    for (int i = 0; i < pdf.Pages.Count; i++)
        //    {
        //        var page = pdf.Pages[i];
        //        page.Canvas.DrawImage(pdfImage, page.Size.Width - pdfImage.Width + 9, 0);
        //    }

        //    //保存文档
        //    pdf.SaveToFile(filePath);
        //}

        ///// <summary>
        ///// 生成条形码
        ///// </summary>
        ///// <param name="filePath"></param>
        ///// <param name="context"></param>
        //public void GenerateBarcode(string filePath, string context, string savePath)
        //{
        //PdfDocument pdf = new PdfDocument();
        ////读取文件
        //pdf.LoadFromFile(filePath);
        //PdfPageBase pb = pdf.Pages.Add();
        //pdf.Pages.Remove(pb);

        ////使用Spire.Barcode的BarcodeSettings和BarcodeGenerator类创建条形码图形
        //Spire.Barcode.BarcodeSettings settings = new BarcodeSettings();
        //settings.Type = BarCodeType.Codabar;
        //settings.Data = context;
        //settings.Data2D = context;
        //settings.ShowText = false;
        //settings.ShowTopText = false;
        //settings.ShowTextOnBottom = false;
        //settings.ShowCheckSumChar = false;
        //Spire.Barcode.BarCodeGenerator generator = new BarCodeGenerator(settings);
        //Image image = generator.GenerateImage(new Size(40,20));

        ////绘制二维码图形到PDF
        //PdfImage pdfImage = PdfImage.FromImage(image);
        //for (int i = 0; i < pdf.Pages.Count; i++)
        //{
        //    var page = pdf.Pages[i];
        //    page.Canvas.DrawImage(pdfImage, page.Size.Width / 2 - pdfImage.Width / 2, page.Size.Height - pdfImage.Height);
        //}

        ////保存文档
        //pdf.SaveToFile(savePath);
        //}
        #endregion
    }
}