概述
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:
1.通过添加新的一页,在新建的页面上来添加页眉页脚
2.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
使用工具
free spire.pdf for .net 4.3(社区版)
示例代码(供参考)
1.新建一页来添加页眉页脚
1.1 添加页眉
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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:
1.2添加页脚
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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:
2.给现有pdf文档添加页眉页脚
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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类型变量 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类型变量 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:
注意事项
安装之后,添加引用spire.pdf.dll文件到项目程序即可,dll文件可在安装路径下的bin文件夹中获取。
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。
原文链接:https://segmentfault.com/a/1190000016209249