C# QuestPDF常规使用

以下是demo 代码 环境是在  api中

    public class TestModel
    {
        public string Name { get; set; } = "测试";
        public decimal Price { get; set; } = 1;
        public int Quantity { get; set; } = 2;
    }

    [Route("api/[controller]")]
    [ApiController]
    public class IndexController : ControllerBase
    {
        [HttpPost("TestPDF")]
        public IActionResult TestPDF()
        {
            string path_file = @"F:\Users\Administrator\Desktop\" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf";
            //测试样式
            var titleStyle = TextStyle.Default.FontSize(36).SemiBold().FontColor(Colors.Blue.Medium);

            //整合对象
            var pdf_obj = Document.Create(container =>
              {
                  container.Page(page =>
                  {
                      page.Size(PageSizes.A4);
                      page.Margin(2, Unit.Centimetre);
                      page.Background(Colors.White);
                      //字体默认大小20号字体
                      page.DefaultTextStyle(x => x.FontSize(20));

                      //页眉部分
                      page.Header()
                            .Background(Colors.Blue.Accent1)
                            .Row(row =>
                            {
                                row.RelativeItem().Column(column =>
                                {
                                    column.Item().Text("测试标题1").FontFamily("simhei").Style(titleStyle);
                                    column.Item().Text("测试标题2").FontFamily("simhei");
                                });
                            });
                      //.SemiBold().FontSize(36).FontColor(Colors.Blue.Medium);//此处为整体设置

                      //内容部分
                      page.Content()
                          .PaddingVertical(1, Unit.Centimetre)
                          .Column(x =>
                          {
                              x.Spacing(20);
                              x.Item().Text(Placeholders.LoremIpsum());
                              x.Item().Image(Placeholders.Image(200, 100));
                              x.Item().Image(@"F:\Users\Administrator\Desktop\QQ图片20220223154742.jpg");


                              //表格
                              x.Item().Table(table =>
                              {
                                  //设置表头的列参数占比
                                  table.ColumnsDefinition(columns =>
                                  {
                                      columns.ConstantColumn(30);
                                      columns.RelativeColumn();
                                      columns.RelativeColumn();
                                      columns.RelativeColumn();
                                      columns.RelativeColumn();
                                  });

                                  // 表头
                                  table.Header(header =>
                                  {
                                      header.Cell().Text("#").FontFamily("simhei");
                                      header.Cell().Text("商品").FontFamily("simhei");
                                      header.Cell().AlignRight().Text("价格").FontFamily("simhei");
                                      header.Cell().AlignRight().Text("数量").FontFamily("simhei");
                                      header.Cell().AlignRight().Text("总价").FontFamily("simhei");

                                      header.Cell().ColumnSpan(5)
                                          .PaddingVertical(5).BorderBottom(1).BorderColor(Colors.Black);
                                  });


                                  var list = new List<TestModel>();
                                  list.Add(new TestModel());
                                  list.Add(new TestModel());
                                  list.Add(new TestModel());
                                  list.Add(new TestModel());
                                  list.Add(new TestModel());

                                  //数据组合
                                  for (int i = 0; i < list.Count; i++)
                                  {
                                      table.Cell().Element(CellStyle).Text(i + 1).FontFamily("simhei");
                                      table.Cell().Element(CellStyle).Text(list[i].Name).FontFamily("simhei");
                                      table.Cell().Element(CellStyle).AlignRight().Text($"{list[i].Price}$").FontFamily("simhei").Style(titleStyle);
                                      table.Cell().Element(CellStyle).AlignRight().Text(list[i].Quantity).FontFamily("simhei");
                                      table.Cell().Element(CellStyle).AlignRight().Text($"{list[i].Price * list[i].Quantity}$").FontFamily("simhei");

                                      static IContainer CellStyle(IContainer container)
                                      {
                                          return container.BorderBottom(1).BorderColor(Colors.Grey.Lighten2).PaddingVertical(5);
                                      }
                                  }

                              });

                          });

                      //页脚部分
                      page.Footer()
                          .AlignCenter()
                          .Text(x =>
                          {
                              x.Span("Page");
                              x.CurrentPageNumber();
                          });
                  });
              });
            
            byte[] byte_pdf = pdf_obj.GeneratePdf();
            //.GeneratePdf(path_file);//这个是保存道对应目录地址

            //这个是返回对应文件
            return File(byte_pdf, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", $"{DateTime.Now:G}.pdf");
        }