安装

nuget 安装 itext7

注册自定义字体

下载字体文件 .ttc或.ttf到项目目录,设置更新则拷贝到输出目录,这样构建的时候会把字体文件拷贝过去

windows系统自带黑体, 可以直接复制到项目目录, 其路径是

C:WindowsFontssimhei.ttf

因为字体注册只需要一次,所以建议放到StartUp中. 其中的simhei.ttf换为你的字体文件

iText.Kernel.Font.PdfFontFactory.Register("simhei.ttf");

新建pdf文档

using PdfWriter writer = new ("list.pdf");
PdfDocument pdf = new (writer);
Document doc = new (pdf);

PdfWriter可以传入pdf文件目标路径或者Stream,如果不想保存到本地,那用MemoryStream保存在内存中即可. 后边的例子我们就是直接用MemoryStream来保存数据

设置字体

PdfFont sysFont = PdfFontFactory.CreateRegisteredFont("simhei", PdfEncodings.IDENTITY_H, PdfFontFactory.EmbeddingStrategy.PREFER_EMBEDDED, true);
doc.SetFont(sysFont)
   .SetFontSize(12);//设置字体大小

示例

public class OrderDto
    {
        public string Name { get; set; }

        public string Gender { get; set; }

        public string Address { get; set; }

        public string Phone { get; set; }

        public List<ProductDto> Products { get; set; }

        public string Remark { get; set; }
    }

    public class ProductDto
    {
        public string Code { get; set; }

        public string Name { get; set; }

        public string Category { get; set; }

        public string Unit { get; set; }

        public string Sku { get; set; }

        public decimal Price { get; set; }

        public int Quantity { get; set; }
    }

        [HttpGet("pdf")]
        public IActionResult ExportPdf()
        {
            MemoryStream stream = new ();
            PdfWriter writer = new (stream);
            PdfDocument pdf = new (writer);
            Document doc = new (pdf);
            
            //黑体
            PdfFont sysFont = PdfFontFactory.CreateRegisteredFont("simhei", PdfEncodings.IDENTITY_H, PdfFontFactory.EmbeddingStrategy.PREFER_EMBEDDED, true);
            doc.SetFont(sysFont)
                .SetFontSize(12);//设置字体大小

            doc.Add(new Paragraph("订单列表")
                .SetBold()//粗体
                .SetTextAlignment(iText.Layout.Properties.TextAlignment.CENTER)//居中
                );

            var headerTexts = new[] {
                "序号", "姓名", "性别",  "居住地址", "联系电话",
                "货号", "产品名称", "分类", "单位", "规格", "售价", "数量",
                "备注"
            };
            var table = new Table(headerTexts.Length)  // 设置表格列数
                .SetTextAlignment(iText.Layout.Properties.TextAlignment.CENTER)
                ;
            //添加表头
            foreach (var header in headerTexts)
            {
                table.AddHeaderCell(new Cell()
                    .Add(new Paragraph(header))
                    .SetBold()//设置粗体
                    );
            }
　　　　　　　
　　　　　　　　

            var orders = new[]
            {
                new OrderDto
                {
                    Name =  "法外", Gender = "男", Address =  "江苏省南京市江宁区梧桐路325号", Phone = "13545781245", Remark = "就这?",
                    Products = new List<ProductDto>{ new ProductDto { Code="XGRD102", Name = "格子衫", Category = "男装", Unit = "件", Sku = "紫色", Price = 39, Quantity = 1} }
                },
                new OrderDto
                {
                    Name =  "狂徒", Gender = "男", Address =  "重庆市江北区朝鸽大道北777号", Phone = "15845568956", Remark = "代码敲得好,备胎当到老",
                    Products = new List<ProductDto>
                    {
                        new ProductDto { Code="FUS458", Name = "Amd R7 5800X", Category = "电子产品", Unit = "个", Sku = "盒装", Price = 2499, Quantity = 1},
                        new ProductDto { Code="TFES982", Name = "程序员帽子", Category = "配饰", Unit = "件", Sku = "绿色", Price = 666, Quantity = 1},
                    }
                },
                new OrderDto
                {
                    Name =  "张三", Gender = "女", Address =  "辽宁省大连市甘井子区伞兵路2333号", Phone = "15952415263", Remark = "rnm, 退钱!!!",
                    Products = new List<ProductDto>{ new ProductDto { Code="TOP10", Name = "Rnm,退钱同款长袖", Category = "男装", Unit = "件", Sku = "红色", Price = 69, Quantity = 1} }
                },
            };

            for (int i = 0; i < orders.Length; i++)
            {
                int rowSpan = orders[i].Products.Count;//商品行有多少个,基本信息列就要跨对应多少行
                table.StartNewRow();//第一列开启新行
                table
                  .AddCell(new Cell(rowSpan,1).Add(new Paragraph((i + 1).ToString()))//序号
                      .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE))
                  
                  .AddCell(new Cell(rowSpan, 1).Add(new Paragraph(orders[i].Name)).SetMinWidth(25)//姓名  设置最小列宽25,方便名字横向显示
                      .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE))
                  
                  .AddCell(new Cell(rowSpan, 1).Add(new Paragraph(orders[i].Gender))//性别
                      .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE))
                  
                  .AddCell(new Cell(rowSpan, 1).Add(new Paragraph(orders[i].Address))//居住地址
                      .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE))
                  
                  .AddCell(new Cell(rowSpan, 1).Add(new Paragraph(orders[i].Phone))//联系电话
                      .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE));


                //添加一行商品信息 (因为table只能按顺序从左到右一个cell一个cell地加)
                table
                    .AddCell(new Cell(1,1).SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Code)//货号
                    ))

                    .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Name)//产品名称
                    ))

                    .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Category))
                    .SetMinWidth(25)
                    )//分类

                    .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Unit)//单位
                    ))

                    .AddCell(new Cell()
                    .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Sku)//规格
                    .SetMinWidth(25)
                    ))

                    .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Price.ToString("0.00"))//售价
                    ))

                    .AddCell(new Cell()
                    .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Products[0].Quantity.ToString())//数量
                    ))

                    .AddCell(new Cell(rowSpan, 1).SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                    .Add(new Paragraph(orders[i].Remark))
                    );//备注

                //商品行大于1, 需要添加多行商品信息
                if (orders[i].Products.Count > 1)
                {
                    for (int j = 1; j < orders[i].Products.Count; j++)
                    {
                        table
                            .AddCell(new Cell(1, 1).SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Code)//货号
                            ))

                            .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Name)//产品名称
                            ))

                            .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Category))
                            .SetMinWidth(25)
                            )//分类

                            .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Unit)//单位
                            ))

                            .AddCell(new Cell()
                            .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Sku)//规格
                            .SetMinWidth(25)
                            ))

                            .AddCell(new Cell().SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Price.ToString("0.00"))//售价
                            ))

                            .AddCell(new Cell()
                            .SetVerticalAlignment(iText.Layout.Properties.VerticalAlignment.MIDDLE)
                            .Add(new Paragraph(orders[i].Products[j].Quantity.ToString())//数量
                            ));
                    }
                }
            }

            doc.Add(table);
            pdf.Close();//记得关闭PdfDocument和PdfWriter
            writer.Close();
            return File(stream.ToArray(), "application/pdf");
        }

结果如下

有几个要点

单元格合并是通过跨行或跨列来实现的, new Cell(2, 2)表示此单元格跨2行 2列
单元格设置居中最好是放在Add(new Paragraph("xx"))之前
添加单元格只能从左到右一个一个地加,所以有合并行的时候要把第一行全部添加完再添加下边的几行,如图所示.
新的一行要先调用table.StartNewRow() 然后table.AddCell()才会添加到新行
表格的列数是在new Table(13) 时传入的, 传入13就表示有13列