iTextSharp 读取 PDF 替代方案（开发人员教程）

using IronPdf;

// Begin the comparison of IronPDF and iTextSharp for reading PDFs in C#
Console.WriteLine("Comparison of IronPDF And iTextSharp Read PDF Files in C#");

// Read PDF using IronPDF
ReadUsingIronPDF.Read();

public class ReadUsingIronPDF
{
    public static void Read()
    {
        // Specify the path to the PDF document
        string filename = "C:\\code\\articles\\ITextSharp\\ITextSharpIronPdfDemo\\Example.pdf";

        // Create a PDF Reader instance to read the PDF
        var pdfReader = PdfDocument.FromFile(filename);

        // Extract all text from the PDF
        var allText = pdfReader.ExtractAllText();
        Console.WriteLine("------------------Text From PDF-----------------");
        Console.WriteLine(allText);
        Console.WriteLine("------------------Text From PDF-----------------");

        // Extract all images from the PDF
        var allImages = pdfReader.ExtractAllImages();
        Console.WriteLine("------------------Image Count From PDF-----------------");
        Console.WriteLine($"Total Images = {allImages.Count()}");
        Console.WriteLine("------------------Image Count From PDF-----------------");

        // Iterate through each page to extract text from them
        Console.WriteLine("------------------One Page Text From PDF-----------------");
        var pageCount = pdfReader.PageCount;
        for (int page = 0; page < pageCount; page++)
        {
            string text = pdfReader.ExtractTextFromPage(page);
            Console.WriteLine(text);
        }
    }
}

Imports IronPdf

' Begin the comparison of IronPDF and iTextSharp for reading PDFs in C#
Console.WriteLine("Comparison of IronPDF And iTextSharp Read PDF Files in C#")

' Read PDF using IronPDF
ReadUsingIronPDF.Read()

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'public class ReadUsingIronPDF
'{
'	public static void Read()
'	{
'		' Specify the path to the PDF document
'		string filename = "C:\code\articles\ITextSharp\ITextSharpIronPdfDemo\Example.pdf";
'
'		' Create a PDF Reader instance to read the PDF
'		var pdfReader = PdfDocument.FromFile(filename);
'
'		' Extract all text from the PDF
'		var allText = pdfReader.ExtractAllText();
'		Console.WriteLine("------------------Text From PDF-----------------");
'		Console.WriteLine(allText);
'		Console.WriteLine("------------------Text From PDF-----------------");
'
'		' Extract all images from the PDF
'		var allImages = pdfReader.ExtractAllImages();
'		Console.WriteLine("------------------Image Count From PDF-----------------");
'		Console.WriteLine(string.Format("Total Images = {0}", allImages.Count()));
'		Console.WriteLine("------------------Image Count From PDF-----------------");
'
'		' Iterate through each page to extract text from them
'		Console.WriteLine("------------------One Page Text From PDF-----------------");
'		var pageCount = pdfReader.PageCount;
'		for (int page = 0; page < pageCount; page++)
'		{
'			string text = pdfReader.ExtractTextFromPage(page);
'			Console.WriteLine(text);
'		}
'	}
'}

using IronPdf;
using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Canvas.Parser.Listener;
using iText.Kernel.Pdf.Canvas.Parser;

// Begin the comparison of IronPDF and iTextSharp for reading PDFs in C#
Console.WriteLine("Comparison of IronPDF And iTextSharp Read PDF Files in C#");

// Call method to read PDF using iTextSharp library
ReadUsingITextSharp.Read();

public class ReadUsingITextSharp
{
    public static void Read()
    {
        // Specify the path to the PDF document
        string pdfFile = "C:\\code\\articles\\ITextSharp\\ITextSharpIronPdfDemo\\Example.pdf";

        // Create a PDF Reader instance
        PdfReader pdfReader = new PdfReader(pdfFile);

        // Initialize a new PDF Document
        iText.Kernel.Pdf.PdfDocument pdfDocument = new iText.Kernel.Pdf.PdfDocument(pdfReader);

        // Use a text extraction strategy to extract plain text from the PDF
        LocationTextExtractionStrategy strategy = new LocationTextExtractionStrategy();
        string pdfText = PdfTextExtractor.GetTextFromPage(pdfDocument.GetPage(1), strategy);

        // Display the extracted text
        Console.WriteLine(pdfText);
    }
}

Imports IronPdf
Imports iText.Kernel.Pdf
Imports iText.Kernel.Pdf.Canvas.Parser.Listener
Imports iText.Kernel.Pdf.Canvas.Parser

' Begin the comparison of IronPDF and iTextSharp for reading PDFs in C#
Console.WriteLine("Comparison of IronPDF And iTextSharp Read PDF Files in C#")

' Call method to read PDF using iTextSharp library
ReadUsingITextSharp.Read()

'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'public class ReadUsingITextSharp
'{
'	public static void Read()
'	{
'		' Specify the path to the PDF document
'		string pdfFile = "C:\code\articles\ITextSharp\ITextSharpIronPdfDemo\Example.pdf";
'
'		' Create a PDF Reader instance
'		PdfReader pdfReader = New PdfReader(pdfFile);
'
'		' Initialize a new PDF Document
'		iText.Kernel.Pdf.PdfDocument pdfDocument = New iText.Kernel.Pdf.PdfDocument(pdfReader);
'
'		' Use a text extraction strategy to extract plain text from the PDF
'		LocationTextExtractionStrategy strategy = New LocationTextExtractionStrategy();
'		string pdfText = PdfTextExtractor.GetTextFromPage(pdfDocument.GetPage(1), strategy);
'
'		' Display the extracted text
'		Console.WriteLine(pdfText);
'	}
'}