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

static void SetDocumentTemplate(PdfDocument doc, SizeF pageSize, PdfMargins margin)
{
 //创建PDF模板
 PdfPageTemplateElement topSpace = new PdfPageTemplateElement(pageSize.Width, margin.Top);
 topSpace.Foreground = true;
 doc.Template.Top = topSpace;
 //添加文本页眉
 PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("宋体", 15f), true);
 PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Right);
 String Text = "PDF文本页眉";
 float y = 0;
 float x = PdfPageSize.A4.Width;
 topSpace.Graphics.DrawString(Text, font1, PdfBrushes.PaleVioletRed, x, y, format); 
 //添加图片页眉
 PdfImage headerImage = PdfImage.FromFile(@"logo.png");
 float width = headerImage.Width;
 float height = headerImage.Height;
 PointF pageLeftTop = new PointF(0 , 0);
 topSpace.Graphics.DrawImage(headerImage,0,0,width/2,height/2); 
}

PdfDocument doc = new PdfDocument();

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;

SetDocumentTemplate(doc, PdfPageSize.A4, margin);

PdfPageBase page = doc.Pages.Add();
doc.Pages.Add();

doc.SaveToFile("页眉.pdf");
System.Diagnostics.Process.Start("页眉.pdf");

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

namespace PDF添加页眉
{
 class Program
 {
 static void Main(string[] args)
 {
 PdfDocument doc = new PdfDocument();

 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;

 SetDocumentTemplate(doc, PdfPageSize.A4, margin);
 PdfPageBase page = doc.Pages.Add();
 doc.Pages.Add();

 doc.SaveToFile("页眉.pdf");
 System.Diagnostics.Process.Start("页眉.pdf");
 }

 static void SetDocumentTemplate(PdfDocument doc, SizeF pageSize, PdfMargins margin)
 {
 PdfPageTemplateElement topSpace = new PdfPageTemplateElement(pageSize.Width, margin.Top);
 topSpace.Foreground = true;
 doc.Template.Top = topSpace;
 
 PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("宋体", 15f), true);
 PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Right);
 String Text = "PDF文本页眉";
 float y = 0;
 float x = PdfPageSize.A4.Width;
 topSpace.Graphics.DrawString(Text, font1, PdfBrushes.PaleVioletRed, x, y, format);
 
 PdfImage headerImage = PdfImage.FromFile(@"C:\Users\Administrator\Pictures\under_construction.jpg");
 float width = headerImage.Width;
 float height = headerImage.Height;
 PointF pageLeftTop = new PointF(0, 0);
 topSpace.Graphics.DrawImage(headerImage, 0, 0, width / 2, height / 2);
 }
 }
}