แยกไฟล์แนบจาก PDF ผ่าน C#

// Open document
Document pdfDocument = new Document(dataDir + "GetAlltheAttachments.pdf");

// Get embedded files collection
EmbeddedFileCollection embeddedFiles = pdfDocument.EmbeddedFiles;

// Get count of the embedded files
Console.WriteLine("Total files : {0}", embeddedFiles.Count);

int count = 1;

// Loop through the collection to get all the attachments
foreach (FileSpecification fileSpecification in embeddedFiles)
{
    Console.WriteLine("Name: {0}", fileSpecification.Name);
    Console.WriteLine("Description: {0}",
    fileSpecification.Description);
    Console.WriteLine("Mime Type: {0}", fileSpecification.MIMEType);

    // Check if parameter object contains the parameters
    if (fileSpecification.Params != null)
    {
        Console.WriteLine("CheckSum: {0}",
        fileSpecification.Params.CheckSum);
        Console.WriteLine("Creation Date: {0}",
        fileSpecification.Params.CreationDate);
        Console.WriteLine("Modification Date: {0}",
        fileSpecification.Params.ModDate);
        Console.WriteLine("Size: {0}", fileSpecification.Params.Size);
    }

    // Get the attachment and write to file or stream
    byte[] fileContent = new byte[fileSpecification.Contents.Length];
    fileSpecification.Contents.Read(fileContent, 0,
    fileContent.Length);
    FileStream fileStream = new FileStream(dataDir + count + "_out" + ".txt",
    FileMode.Create);
    fileStream.Write(fileContent, 0, fileContent.Length);
    fileStream.Close();
    count+=1;
}