Spire.PDF provides developers two methods to detect if a PDF file is PDF/A. The one is to use PdfDocument.Conformance property, the other is to use PdfDocument.XmpMetaData property. The following examples demonstrate how we can detect if a PDF file is PDF/A using these two methods.
Below is the screenshot of the sample file we used for demonstration:
Using PdfDocument.Conformance
using Spire.Pdf;
using System;
namespace Detect
{
class Program
{
static void Main(string[] args)
{
//Initialize a PdfDocument object
PdfDocument pdf = new PdfDocument();
//Load the PDF file
pdf.LoadFromFile("Example.pdf");
//Get the conformance level of the PDF file
PdfConformanceLevel conformance = pdf.Conformance;
Console.WriteLine("This PDF file is " + conformance.ToString());
}
}
}
Output:
