该文将详细介绍在保存Excel工作簿到PDF文档时，在 PDF 结果文档中添加页码。

using Spire.Xls;

namespace ExcelDemo
{
    class Program
    {
        static void Main(string[] args)
        {

            //加载示例文档
            Workbook wbk = new Workbook();
            wbk.LoadFromFile("Sample.xlsx");

            foreach (Worksheet sheet in wbk.Worksheets)
            {
            //&P 指Page Number, &N 指总页数
            sheet.PageSetup.RightFooter = "&P/&N";
            }

            //保存文档
            wbk.SaveToFile("Result.pdf", FileFormat.PDF);

        }
    }
}

Imports Spire.Xls

Namespace ExcelDemo
    
    Class Program
        
        Private Shared Sub Main(ByVal args() As String)
            '加载示例文档
            Dim wbk As Workbook = New Workbook
            wbk.LoadFromFile("Sample.xlsx")
            For Each sheet As Worksheet In wbk.Worksheets
                '&P 指Page Number, &N 指总页数
                sheet.PageSetup.RightFooter = "&P/&N"
            Next
            '保存文档
            wbk.SaveToFile("Result.pdf", FileFormat.PDF)
        End Sub
    End Class
End Namespace

效果图：