267 lines
10 KiB
C#
267 lines
10 KiB
C#
using static System.Net.Mime.MediaTypeNames;
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using iText.Kernel.Pdf;
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using iText.Kernel.Geom;
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using iText.IO.Image;
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using iText.Layout.Element;
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using Image = iText.Layout.Element.Image;
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using iText.Layout.Properties;
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using iText.Layout;
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using iText.Kernel.Font;
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using iText.IO.Font;
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using iText.Kernel.Colors;
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namespace PDFGenerateApi
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{
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public class PdfOptHelper
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{
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/// <summary>
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///
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/// </summary>
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/// <param name="pagetitle"></param>
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/// <param name="headers"></param>
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/// <param name="majors"></param>
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/// <param name="dataModels"></param>
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/// <returns></returns>
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public static MemoryStream CreatePdf(string pagetitle, List<string> headers, List<string> majors, List<dataModel> dataModels,DateTime dtnow)
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{
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// 创建内存流
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using (var stream = new MemoryStream())
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{
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// 创建 PDF Writer
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PdfWriter writer = new PdfWriter(stream, new WriterProperties().SetCompressionLevel(CompressionConstants.BEST_COMPRESSION));
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PdfDocument pdf = new PdfDocument(writer);
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// 设置页面大小为横向 A4
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PageSize pageSize = PageSize.A4.Rotate();
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// 设置页面大小为 A4
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pdf.SetDefaultPageSize(pageSize);
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Document document = new Document(pdf);
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// 加载中文字体
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string fontsPath = System.IO.Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "fonts", "AlimamaDongFangDaKai-Regular.otf");
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//if (!File.Exists(fontsPath))
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//{
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// bool aa = true;
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// // _logger.LogError($"Font file not found at path: {fontsPath}");
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// // return NotFound("Font file not found.");
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//}
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PdfFont font = PdfFontFactory.CreateFont(fontsPath, PdfEncodings.IDENTITY_H, PdfFontFactory.EmbeddingStrategy.PREFER_EMBEDDED);
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// 加载 logo 图像
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string logoPath = "https://i5.youzy.cn/util4y/media/files/20231026/7840b6f1f30c413eade15babc70be26e_%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20230811154443.png"; // 确保 logo.png 放在 wwwroot 目录下
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ImageData imageData = ImageDataFactory.Create(logoPath);
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Image logo = new Image(imageData);
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logo.SetWidth(124);
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logo.SetHeight(40);
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// 将 logo 添加到文档中
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document.Add(logo);
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Paragraph title = CreateTitle(font, pagetitle);
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document.Add(title);
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// 添加标题下方内容
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Paragraph subtitle = CreateSubTitle(font, string.Format("最后修改时间:{0}", dtnow.ToString("yyyy-MM-dd HH:mm")));
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document.Add(subtitle);
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dataModels.ForEach(a =>
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{
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Table universitytable = HeaderTable(font, 9, headers, new List<dataModel>() { a });
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universitytable.SetMarginTop(20);
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document.Add(universitytable);
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Table majortable = MajorTable(font, 9, majors, a.majorModels);
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document.Add(majortable);
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// 手动分页并添加新的表格，不带表头
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// document.Add(new AreaBreak(AreaBreakType.NEXT_PAGE));
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});
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//专业
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// 关闭文档
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document.Close();
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// 返回 PDF 文件
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return stream;
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}
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}
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/// <summary>
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/// 标题
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/// </summary>
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/// <param name="font"></param>
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/// <param name="titletext"></param>
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/// <returns></returns>
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private static Paragraph CreateTitle(PdfFont font, string titletext)
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{
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Paragraph title = new Paragraph(titletext)
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.SetTextAlignment(TextAlignment.CENTER)
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.SetFont(font)
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.SetBold()
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.SetFontSize(16)
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.SetMarginTop(20)
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.SetMarginBottom(5);
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return title;
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}
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/// <summary>
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/// 创建副标
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/// </summary>
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/// <param name="font"></param>
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/// <param name="titletext"></param>
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/// <returns></returns>
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private static Paragraph CreateSubTitle(PdfFont font, string titletext)
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{
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Paragraph title = new Paragraph(titletext)
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.SetTextAlignment(TextAlignment.CENTER)
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.SetFont(font)
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.SetFontColor(ColorConstants.GRAY) // 设置字体颜色为灰色
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.SetFontSize(12)
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.SetMarginBottom(20);
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return title;
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}
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/// <summary>
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/// table表头
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/// </summary>
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/// <param name="tb"></param>
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/// <param name="headers"></param>
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/// <returns></returns>
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private static Table HeaderTable(PdfFont font, int tb, List<string> headers, List<dataModel> dataList)
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{
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float[] columnWidths = { 1, 1, 2, 3, 2, 2, 2, 1, 1 };
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Table table = new Table(columnWidths);
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table.SetWidth(UnitValue.CreatePercentValue(100));
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int h = 0;
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foreach (var header in headers)
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{
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h++;
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if (h == 4)
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{
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table.AddHeaderCell(new Cell().Add(new Paragraph(header).SetWidth(120).SetFont(font).SetBold().SetTextAlignment(TextAlignment.CENTER)));
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}
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else
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{
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table.AddHeaderCell(new Cell().Add(new Paragraph(header).SetWidth(50).SetFont(font).SetBold().SetTextAlignment(TextAlignment.CENTER)));
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}
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}
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dataList.ForEach(a =>
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{
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table.AddCell(new Cell().Add(new Paragraph(a.id.ToString()).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.probability).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.universityCode).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.universityName).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.planCount).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.history).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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a.years.ForEach(a =>
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{
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table.AddCell(new Cell().Add(new Paragraph(a).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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});
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});
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return table;
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}
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private static Table MajorTable(PdfFont font, int tb, List<string> headers, List<dataMajorModel> dataList)
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{
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float[] columnWidths = { 1, 1, 2, 3, 2, 2, 2, 1, 1 };
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Table table = new Table(columnWidths);
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table.SetWidth(UnitValue.CreatePercentValue(100));
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int h = 0;
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foreach (var header in headers)
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{
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h++;
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if (h == 4)
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{
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table.AddCell(new Cell().Add(new Paragraph(header).SetWidth(85).SetFont(font).SetBold().SetTextAlignment(TextAlignment.CENTER)));
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}
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else
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{
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table.AddCell(new Cell().Add(new Paragraph(header).SetFont(font).SetBold().SetTextAlignment(TextAlignment.CENTER)));
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}
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}
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dataList.ForEach(a =>
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{
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table.AddCell(new Cell().Add(new Paragraph(a.id.ToString()).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.probability).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.majorCode).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.mjaorName).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.planCount).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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table.AddCell(new Cell().Add(new Paragraph(a.history).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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a.years.ForEach(a =>
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{
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table.AddCell(new Cell().Add(new Paragraph(a).SetFont(font).SetTextAlignment(TextAlignment.CENTER)));
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});
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});
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return table;
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}
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public class dataModel
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{
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public int id { get; set; }
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/// <summary>
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///
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/// </summary>
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public string probability { get; set; }
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/// <summary>
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///
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/// </summary>
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public string universityCode { get; set; }
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/// <summary>
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///
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/// </summary>
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public string universityName { get; set; }
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public string planCount { get; set; }
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public string history { get; set; }
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public List<string> years { get; set; }
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/// <summary>
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///
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/// </summary>
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public List<dataMajorModel> majorModels { get; set; }
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}
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public class dataMajorModel
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{
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public int id { get; set; }
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/// <summary>
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///
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/// </summary>
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public string probability { get; set; }
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/// <summary>
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///
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/// </summary>
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public string majorCode { get; set; }
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/// <summary>
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///
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/// </summary>
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public string mjaorName { get; set; }
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public string planCount { get; set; }
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public string history { get; set; }
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public List<string> years { get; set; }
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}
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}
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}
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