ค้นหาไฟล์ PDF ด้วย C#

    //Search Text from All the Pages of PDF Document
    Document pdfDocument = new Document("SearchAndGetTextFromAll.pdf");

    // Create TextAbsorber object to find all instances of the input search phrase
    TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("text");

    // Accept the absorber for all the pages
    pdfDocument.Pages.Accept(textFragmentAbsorber);

    // Get the extracted text fragments
    TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;

    // Loop through the fragments
    foreach (TextFragment textFragment in textFragmentCollection)
    {

        Console.WriteLine("Text : {0} ", textFragment.Text);
        Console.WriteLine("Position : {0} ", textFragment.Position);
        Console.WriteLine("XIndent : {0} ", textFragment.Position.XIndent);
        Console.WriteLine("YIndent : {0} ", textFragment.Position.YIndent);
        Console.WriteLine("Font - Name : {0}", textFragment.TextState.Font.FontName);
        Console.WriteLine("Font - IsAccessible : {0} ", textFragment.TextState.Font.IsAccessible);
        Console.WriteLine("Font - IsEmbedded : {0} ", textFragment.TextState.Font.IsEmbedded);
        Console.WriteLine("Font - IsSubset : {0} ", textFragment.TextState.Font.IsSubset);
        Console.WriteLine("Font Size : {0} ", textFragment.TextState.FontSize);
        Console.WriteLine("Foreground Color : {0} ", textFragment.TextState.ForegroundColor);
    }