C# 在PDF文档中插入页眉页脚的2种方法

页眉页脚是一篇完整、精致的文档的重要组成部分。在页眉页脚处,可以呈现的内容很多,如公司名称、页码、工作表名、日期、图片,如LOGO、标记等。在下面的文章中,将介绍如何在PDF中添加页眉页脚。通过代码测试,添加页眉页脚可以分两种情况来实现效果:

  • 通过添加新的一页,在新建的页面上来添加页眉页脚
  • 通过给现有文档直接添加页眉页脚
    下面将根据这两种情况介绍具体的C#代码操作
    (示例供参考)
    使用工具:Free Spire.PDF for .NET 4.3(社区版)

    1.新建一页来添加页眉页脚

    1.1 添加页眉

    【C#】

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System.Drawing;
using System;

namespace AddHeader_PDF
{
    class Program
    {
        static void Main(string[] args)
        {
            //新建一个PdfDocument类对象,并添加一页
            PdfDocument pdf = new PdfDocument();
            PdfPageBase page = pdf.Pages.Add();

            //设置margin
            PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
            PdfMargins margin = new PdfMargins();
            margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Bottom = margin.Top;
            margin.Left = unitCvtr.ConvertUnits(4.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Right = margin.Left;

            //调用AddHeader()方法添加页眉
            AddHeader(pdf, PdfPageSize.A4, margin);

            //保存并打开文档
            pdf.SaveToFile("PDF页眉.pdf");
            System.Diagnostics.Process.Start("PDF页眉.pdf");
        }

        static void AddHeader(PdfDocument doc, SizeF pageSize, PdfMargins margin)
        {
            //初始化一个PdfPageTemplateElement对象,用于创建页眉
            PdfPageTemplateElement headerSpace = new PdfPageTemplateElement(pageSize.Width, margin.Top);
            headerSpace.Foreground = true;
            doc.Template.Top = headerSpace;

            //在页眉部分绘入文字
            PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial Unicode MS", 10f), true);
            PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Right);
            String headerText = "WORLD TRADE ORGANIZATION, WTO \n THE INTERNATIONAL ORGANIZATION THAT REGULATES INTERNATIONAL TRADE";
            float x = PdfPageSize.A4.Width;
            float y = 0;
            headerSpace.Graphics.DrawString(headerText, font, PdfBrushes.Black, x, y, format);

            //在页眉部分绘入图片
            PdfImage headerImage = PdfImage.FromFile(@"C:\Users\Administrator\Desktop\1.png");
            float width = headerImage.Width / 2;
            float height = headerImage.Height / 3;
            headerSpace.Graphics.DrawImage(headerImage, 0, 0, width, height);

        }
    }
}

页眉添加效果:
C# 在PDF文档中插入页眉页脚的2种方法

1.2添加页脚

【C#】

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System.Drawing;
using System;
using Spire.Pdf.AutomaticFields;

namespace AddFooter_PDF
{
    class Program
    {
        static void Main(string[] args)
        {
            //新建一个PdfDocument类对象,添加一页
            PdfDocument doc = new PdfDocument();
            PdfPageBase page = doc.Pages.Add();

            //设置margin
            PdfUnitConvertor unitCvtr = new PdfUnitConvertor();
            PdfMargins margin = new PdfMargins();
            margin.Top = unitCvtr.ConvertUnits(2.54f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Bottom = margin.Top;
            margin.Left = unitCvtr.ConvertUnits(4.17f, PdfGraphicsUnit.Centimeter, PdfGraphicsUnit.Point);
            margin.Right = margin.Left;

            //调用AddFooter()方法添加页脚
            AddFooter(doc, PdfPageSize.A4, margin);

            //调用AddPageNumber()方法添加页码
            AddPageNumber(doc, margin);

            //保存并打开文档
            doc.SaveToFile("PDF页脚.pdf");
            System.Diagnostics.Process.Start("PDF页脚.pdf");
        }

        static void AddFooter(PdfDocument doc, SizeF pageSize, PdfMargins margin)
        {
            //初始化一个PdfPageTemplateElement对象,用于创建页脚
            PdfPageTemplateElement footerSpace = new PdfPageTemplateElement(pageSize.Width, margin.Bottom);
            footerSpace.Foreground = true;
            doc.Template.Bottom = footerSpace;

            //在页脚部分绘入文字
            PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial Unicode MS", 10f), true);
            PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Center);
            String headerText = "Website : www.wto.org";
            float x = PdfPageSize.A4.Width / 2;
            float y = 0;
            footerSpace.Graphics.DrawString(headerText, font, PdfBrushes.Black, x, y, format);
        }
        static void AddPageNumber(PdfDocument doc, PdfMargins margin)
        {
            //添加页码到页脚部分
            foreach (PdfPageBase page in doc.Pages)
            {
                PdfStringFormat format1 = new PdfStringFormat(PdfTextAlignment.Left);
                int x1 = Convert.ToInt32(page.Canvas.ClientSize.Width / 2);
                int y1 = Convert.ToInt32(page.Canvas.ClientSize.Height - margin.Bottom + 20);
                Rectangle bounds = new Rectangle(x1, y1, 20, 20);
                PdfPageNumberField field = new PdfPageNumberField();
                PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial Unicode MS", 10f), true);
                field.Font = font;
                field.StringFormat = format1;
                field.Brush = PdfBrushes.Black;
                field.Bounds = bounds;
                field.Draw(page.Canvas);
            }

        }
    }
}

页脚添加效果:
C# 在PDF文档中插入页眉页脚的2种方法

2.给现有PDF文档添加页眉页脚

【C#】

using Spire.Pdf;
using Spire.Pdf.AutomaticFields;
using Spire.Pdf.Graphics;
using System;
using System.Drawing;

namespace PdfHeader
{
    class Program
    {
        static void Main(string[] args)
        {
            //加载一个测试文档
            PdfDocument existingPdf = new PdfDocument();
            existingPdf.LoadFromFile("Test.pdf");

            //调用DrawHeader方法在现有文档添加页眉
            DrawHeader(existingPdf);

            //调用DrawFooter方法在现有文档添加页脚
            DrawFooter(existingPdf);

            //保存并打开文档
            existingPdf.SaveToFile("output.pdf");
            System.Diagnostics.Process.Start("output.pdf");

        }
        //在页面上方空白部位绘制页眉
        static void DrawHeader(PdfDocument doc)
        {
            //获取页面大小
            SizeF pageSize = doc.Pages[0].Size;

            //声明x,y两个float型变量
            float x = 90;
            float y = 20;

            for (int i = 0; i < doc.Pages.Count; i++)
            {
                //在每一页的指定位置绘制图片
                PdfImage headerImage = PdfImage.FromFile("logo.png");
                float width = headerImage.Width / 7;
                float height = headerImage.Height / 7;
                doc.Pages[i].Canvas.DrawImage(headerImage, x, y, width, height);

                //在每一页的指定位置绘制横线
                PdfPen pen = new PdfPen(PdfBrushes.Gray, 0.5f);
                doc.Pages[i].Canvas.DrawLine(pen, x, y + height + 2, pageSize.Width - x, y + height + 2);
            }
        }

        //在页面下方空白部位绘制页脚
        static void DrawFooter(PdfDocument doc)
        {
            //获取页面大小
            SizeF pageSize = doc.Pages[0].Size;

            //声明x,y两个float型变量
            float x = 90;
            float y = pageSize.Height - 72;

            for (int i = 0; i < doc.Pages.Count; i++)
            {
                //在每一页的指定位置绘制横线
                PdfPen pen = new PdfPen(PdfBrushes.Gray, 0.5f);
                doc.Pages[i].Canvas.DrawLine(pen, x, y, pageSize.Width - x, y);

                //在每一页的指定位置绘制文字
                y = y + 5;
                PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("黑体", 10f, FontStyle.Bold), true);
                PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Left);
                String footerText = " Website\n https://g20.org/";
                doc.Pages[i].Canvas.DrawString(footerText, font, PdfBrushes.Black, x, y, format);                 
                //在每一页的指定位置当前页码和总页码
                PdfPageNumberField number = new PdfPageNumberField();
                PdfPageCountField count = new PdfPageCountField();
                PdfCompositeField compositeField = new PdfCompositeField(font, PdfBrushes.Black, "{0}/{1}", number, count);
                compositeField.StringFormat = new PdfStringFormat(PdfTextAlignment.Right, PdfVerticalAlignment.Top);
                SizeF size = font.MeasureString(compositeField.Text);
                compositeField.Bounds = new RectangleF(pageSize.Width - x - size.Width, y, size.Width, size.Height);
                compositeField.Draw(doc.Pages[i].Canvas);
            }
        }
    }
}

测试效果:
C# 在PDF文档中插入页眉页脚的2种方法以上是本次关于C#添加PDF页眉页脚的全部内容,两种情况中的示例方法,可以选择参考使用。本文完。(如需转载,请注明出处)

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