c#/vb.net 将页码添加到现有 pdf 文档-k8凯发天生赢家

pm> install-package spire.pdf

using spire.pdf;
using spire.pdf.automaticfields;
using spire.pdf.graphics;
using system.drawing;
namespace addpagenumbers
{
    class program
    {
        static void main(string[] args)
        {
            //初始化 pdfdocument 类的实例
            pdfdocument pdf = new pdfdocument();
            //加载示例文档
            pdf.loadfromfile("示例文档.pdf");
            //设置页码字体样式
            pdftruetypefont font = new pdftruetypefont(new font("宋体", 10f, fontstyle.regular), true);
            //初始化 pdfpagenumberfield 类的实例
            pdfpagenumberfield pagenumber = new pdfpagenumberfield();
            //初始化pdfpagecountfield 类的实例
            pdfpagecountfield pagecount = new pdfpagecountfield();
            //初始化pdfcompositefield 类的实例
            pdfcompositefield compositefield = new pdfcompositefield(font, pdfbrushes.black, "第{0}页，共{1}页", pagenumber, pagecount);
            //设置复合字段的文本对齐方式
            compositefield.stringformat = new pdfstringformat(pdftextalignment.left, pdfverticalalignment.top);
            //循环遍历页面
            for (int i = 0; i < pdf.pages.count; i  )
            {
                //在页面的特定位置绘制复合字段
                compositefield.draw(pdf.pages[i].canvas, pdf.pages[i].size.width / 4 - 20, pdf.pages[i].size.height / 2- 20);
            }
            //保存结果文档
            pdf.savetofile("添加页码.pdf");
        }
    }
}

imports spire.pdf
imports spire.pdf.automaticfields
imports spire.pdf.graphics
namespace addpagenumbers
    friend class program
        private shared sub main(byval args as string())
            '初始化 pdfdocument 类的实例
            dim pdf as pdfdocument = new pdfdocument()
            '加载示例文档
            pdf.loadfromfile("示例文档.pdf")
            '设置页码字体样式
            dim font as pdftruetypefont = new pdftruetypefont(new font("宋体", 10f, fontstyle.regular), true)
            '初始化 pdfpagenumberfield 类的实例
            dim pagenumber as pdfpagenumberfield = new pdfpagenumberfield()
            '初始化pdfpagecountfield 类的实例
            dim pagecount as pdfpagecountfield = new pdfpagecountfield()
            '初始化pdfcompositefield 类的实例
            dim compositefield as pdfcompositefield = new pdfcompositefield(font, pdfbrushes.black, "第{0}页，共{1}页", pagenumber, pagecount)
            '设置复合字段的文本对齐方式
            compositefield.stringformat = new pdfstringformat(pdftextalignment.left, pdfverticalalignment.top)
            '循环遍历页面
            for i as integer = 0 to pdf.pages.count - 1
                '在页面的特定位置绘制复合字段
                compositefield.draw(pdf.pages(i).canvas, pdf.pages(i).size.width / 4 - 20, pdf.pages(i).size.height / 2 - 20)
            next
            '保存结果文档
            pdf.savetofile("添加页码.pdf")
        end sub
    end class
end namespace