本文介绍如何使用Spire.PDF for .NET将PDF转为符合PDF/A-1A, 2A, 3A, 1B, 2B和3B标准的PDF。

using System;
using Spire.Pdf.Conversion;

namespace ConvertPdf2PdfA
{
    class Program
    {
        static void Main(string[] args)
        {
            //指定输入文档路径
            String inputFile = @"C:\Users\Administrator\Desktop\sample.pdf";

            //指定输出文档的存放文件夹
            String outputFolder = @"C:\Users\Administrator\Desktop\Output\";

            //创建PdfStandardsConverter对象，传入输入文档路径
            PdfStandardsConverter converter = new PdfStandardsConverter(inputFile);

            //转换为PdfA1A
            converter.ToPdfA1A(outputFolder + "ToPdfA1A.pdf");

            //转换为PdfA1B
            converter.ToPdfA1B(outputFolder + "ToPdfA1B.pdf");

            //转换为PdfA2A
            converter.ToPdfA2A(outputFolder + "ToPdfA2A.pdf");

            //转换为PdfA2B
            converter.ToPdfA2B(outputFolder + "ToPdfA2B.pdf");

            //转换为PdfA3A
            converter.ToPdfA3A(outputFolder + "ToPdfA3A.pdf");

            //转换为PdfA3B
            converter.ToPdfA3B(outputFolder + "ToPdfA3B.pdf");
        }
    }
}

Imports System
Imports Spire.Pdf.Conversion
 
Namespace ConvertPdf2PdfA
    Class Program
        Shared  Sub Main(ByVal args() As String)
            '指定输入文档路径
            Dim inputFile As String =  "C:\Users\Administrator\Desktop\sample.pdf" 
 
            '指定输出文档的存放文件夹
            Dim outputFolder As String =  "C:\Users\Administrator\Desktop\Output\" 
 
            '创建PdfStandardsConverter对象，传入输入文档路径
            Dim converter As PdfStandardsConverter =  New PdfStandardsConverter(inputFile) 
 
            '转换为PdfA1A
            converter.ToPdfA1A(outputFolder + "ToPdfA1A.pdf")
 
            '转换为PdfA1B
            converter.ToPdfA1B(outputFolder + "ToPdfA1B.pdf")
 
            '转换为PdfA2A
            converter.ToPdfA2A(outputFolder + "ToPdfA2A.pdf")
 
            '转换为PdfA2B
            converter.ToPdfA2B(outputFolder + "ToPdfA2B.pdf")
 
            '转换为PdfA3A
            converter.ToPdfA3A(outputFolder + "ToPdfA3A.pdf")
 
            '转换为PdfA3B
            converter.ToPdfA3B(outputFolder + "ToPdfA3B.pdf")
        End Sub
    End Class
End Namespace