public static class Pinyin

 {

 public static string ConvertEncoding(string text, Encoding srcEncoding, Encoding dstEncoding);

 public static string GetChineseText(string pinyin);

 public static string GetChineseText(string pinyin, Encoding encoding);

 public static string GetInitials(string text);

 public static string GetInitials(string text, Encoding encoding);

 public static string GetPinyin(string text);

 public static string GetPinyin(string text, Encoding encoding);

 public static string GetPinyin(char ch);

 public static string GetPinyin(char ch, Encoding encoding);

 }
https://www.nuget.org/packages/HxfPinYin/

string sFileName = $"{Guid.NewGuid()}.xlsx";

  FileInfo file = new FileInfo(sFileName);

  string[] title = { "货品编号",

  "货品名称",

  "条码",

  "规格",

  "基本单位",

  "当前库存",

  "库存下限",

  "库存上限"

  };

  using (ExcelPackage package = new ExcelPackage(file))

  {

  ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("库存信息");

  int index = 1;

  foreach (string t in title)

  {

   worksheet.Cells[1, index++].Value = t;

  }

  index = 2;

  foreach (var d in list)

  {

   worksheet.Cells[index,1].Value = d.ProductCode;

   worksheet.Cells[index, 2].Value = d.ProductName;

   worksheet.Cells[index, 3].Value = d.BarCode;

   worksheet.Cells[index, 4].Value = d.SpecValues;

   worksheet.Cells[index, 5].Value = d.BaseUnit;

   worksheet.Cells[index, 6].Value = d.Quantity;

   worksheet.Cells[index, 7].Value = d.DownLimitQuantity;

   worksheet.Cells[index, 8].Value = d.UpLimitQuantity;

   index++;

  }

  package.Save();

  }
https://www.nuget.org/packages/EPPlus.Core/

string tempFilePath = $"{Guid.NewGuid()}.pdf";

  string[] title = { "货品编号",

  "货品名称",

  "条码",

  "规格",

  "基本单位",

  "当前库存",

  "库存下限",

  "库存上限"

  };

  using (FileStream wfs = new FileStream(tempFilePath, FileMode.OpenOrCreate)) {

  //PageSize.A4.Rotate();当需要把PDF纸张设置为横向时

  Document docPDF = new Document(PageSize.A4,10, 10, 20,20);

  PdfWriter write = PdfWriter.GetInstance(docPDF, wfs);

  docPDF.Open();

  //在这里需要注意的是，itextsharp不支持中文字符，想要显示中文字符的话需要自己设置字体

  BaseFont bsFont = BaseFont.CreateFont(@"C:\Windows\Fonts\simsun.ttc,0", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

  Font font = new Font(bsFont);

  float[] clos = new float[] { 40,40,40,20,20,30,30,30};// 宽度

  PdfPTable tablerow1 = new PdfPTable(clos);

  foreach (string t in title)

  {

   PdfPCell cell = new PdfPCell(new Paragraph(t, font));

   cell.MinimumHeight = 4f;

   tablerow1.AddCell(cell);

  }

  foreach (var d in list)

  {

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.ProductCode, font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.ProductName, font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.BarCode, font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.SpecValues, font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.BaseUnit, font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.Quantity.ToString(), font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.DownLimitQuantity.ToString(), font)));

   tablerow1.AddCell(new PdfPCell(new Paragraph(d.UpLimitQuantity.ToString(), font)));

  }

  docPDF.Add(tablerow1);//将表格添加到pdf文档中

  docPDF.Close();//关闭

  write.Close();

  wfs.Close();

  }
https://www.nuget.org/packages/iTextSharp.LGPLv2.Core/