IronPDF与GrapeCity PDF Viewer之间的比较

using System;
using System.IO;
using System.Drawing;
using System.Text;
using GrapeCity.Documents.Text;
using GrapeCity.Documents.Common;
using GrapeCity.Documents.Drawing;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Pdf.Structure;
using GrapeCity.Documents.Pdf.MarkedContent;
using GrapeCity.Documents.Pdf.Graphics;
using GrapeCity.Documents.Pdf.Annotations;
using GCTEXT = GrapeCity.Documents.Text;
using GCDRAW = GrapeCity.Documents.Drawing;
namespace GcPdfWeb.Samples.Basics
{
    // This sample shows how to create a PDF/A-3u compliant document.
    public class PdfA
    {
        public void CreatePDF(Stream stream)
        {
            var doc = new GcPdfDocument();
            var date = new DateTime(1961, 4, 12, 6, 7, 0, DateTimeKind.Utc);

            // Mark the document as PDF/A-3u conformant:
            doc.ConformanceLevel = PdfAConformanceLevel.PdfA3u;

            var fnt = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "arial.ttf"));
            var gap = 36;

            // PDF/A-3a requires all content to be tagged so create and populate StructElement when rendering:
            StructElement sePart = new StructElement("Part");
            doc.StructTreeRoot.Children.Add(sePart);

            TextLayout tl = null;
            // Add 3 pages with sample content tagged according to PDF/A rules:
            for (int pageNo = 1; pageNo <= 3; ++pageNo)
            {
                // add page
                var page = doc.Pages.Add();
                var g = page.Graphics;
                float y = 72;
                if (doc.Pages.Count == 1)
                {
                    // Create paragraph element:
                    var seParagraph = new StructElement("P") { DefaultPage = page };
                    // Add it to Part element:
                    sePart.Children.Add(seParagraph);

                    tl = g.CreateTextLayout();
                    tl.MarginAll = 72;
                    tl.MaxWidth = page.Size.Width;

                    tl.DefaultFormat.Font = fnt;
                    tl.DefaultFormat.FontBold = true;
                    tl.DefaultFormat.FontSize = 20;
                    tl.Append("PDF/A-3A Document");

                    // PerformLayout is done automatically in a new TextLayout or after a Clear():
                    //tl.PerformLayout(true);

                    // Draw TextLayout within tagged content:
                    g.BeginMarkedContent(new TagMcid("P", 0));
                    g.DrawTextLayout(tl, PointF.Empty);
                    g.EndMarkedContent();

                    y = tl.ContentRectangle.Bottom + gap;

                    seParagraph.ContentItems.Add(new McidContentItemLink(0));
                }

                // Add some sample paragraphs tagged according to PDF/A rules:
                for (int i = 1; i <= 3; ++i)
                {
                    // Create paragraph element:
                    var seParagraph = new StructElement("P") { DefaultPage = page };
                    // Add it to Part element:
                    sePart.Children.Add(seParagraph);

                    var sb = new StringBuilder();
                    sb.Append(string.Format("Paragraph {0} on page {1}: ", i, pageNo));
                    sb.Append(Common.Util.LoremIpsum(1, 2, 4, 5, 10));
                    var para = sb.ToString();

                    tl.Clear();
                    tl.DefaultFormat.FontSize = 14;
                    tl.DefaultFormat.FontBold = false;
                    tl.MarginTop = y;
                    tl.Append(para);

                    // Draw TextLayout within tagged content:
                    g.BeginMarkedContent(new TagMcid("P", i));
                    g.DrawTextLayout(tl, PointF.Empty);
                    g.EndMarkedContent();

                    y += tl.ContentHeight + gap;

                    // Add content item to paragraph StructElement:
                    seParagraph.ContentItems.Add(new McidContentItemLink(i));

                    // PDF/A-3 allows embedding files into document, but they should be associated with some document element
                    // add embedded file associated with seParagraph:
                    var ef1 = EmbeddedFileStream.FromBytes(doc, Encoding.UTF8.GetBytes(para));
                    // ModificationDate and MimeType should be specified in case of PDF/A:
                    ef1.ModificationDate = date;
                    ef1.MimeType = "text/plain";
                    var fn = string.Format("Page{0}_Paragraph{1}.txt", pageNo, i);
                    var fs1 = FileSpecification.FromEmbeddedStream(fn, ef1);
                    // UnicodeFile.FileName should be specified for PDF/A compliance:
                    fs1.UnicodeFile.FileName = fs1.File.FileName;
                    // Relationship should be specified in case of PDF/A:
                    fs1.Relationship = AFRelationship.Unspecified;
                    doc.EmbeddedFiles.Add(fn, fs1);
                    seParagraph.AssociatedFiles.Add(fs1);
                }
            }

            // PDF/A-3 allows transparency drawing in PDF file, add some:
            var gpage = doc.Pages [0].Graphics;
            gpage.FillRectangle(new RectangleF(20, 20, 200, 200), Color.FromArgb(40, Color.Red));

            // PDF/A-3 allows using FormXObjects, add one with transparency:
            var r = new RectangleF(0, 0, 144, 72);
            var fxo = new FormXObject(doc, r);
            var gfxo = fxo.Graphics;
            gfxo.FillRectangle(r, Color.FromArgb(40, Color.Violet));
            TextFormat tf = new TextFormat()
            {
                Font = fnt,
                FontSize = 16,
                ForeColor = Color.FromArgb(100, Color.Black),
            };
            gfxo.DrawString("FormXObject", tf, r, TextAlignment.Center, ParagraphAlignment.Center);
            gfxo.DrawRectangle(r, Color.Blue, 3);
            gpage.DrawForm(fxo, new RectangleF(300, 250, r.Width, r.Height), null, ImageAlign.ScaleImage);

            // PDF/A-3 allows using embedded files, but each embedded file must be associated with a document's element:
            EmbeddedFileStream ef = EmbeddedFileStream.FromFile(doc, Path.Combine("Resources", "WordDocs", "ProcurementLetter.docx"));
            // ModificationDate and MimeType should be specified for EmbeddedFile in PDF/A:
            ef.ModificationDate = date;
            ef.MimeType = "application/msword";
            var fs = FileSpecification.FromEmbeddedFile(ef);
            fs.UnicodeFile.FileName = fs.File.FileName;
            fs.Relationship = AFRelationship.Unspecified;
            doc.EmbeddedFiles.Add("ProcurementLetter.docx", fs);
            // Associate embedded file with the document:
            doc.AssociatedFiles.Add(fs);

            // Add an attachment associated with an annotation:
            var sa = new StampAnnotation()
            {
                UserName = "Minerva",
                Font = fnt,
                Rect = new RectangleF(300, 36, 220, 72),
            };
            sa.Flags |= AnnotationFlags.Print;
            // Use a FormXObject to represent the stamp annotation:
            var stampFxo = new FormXObject(doc, new RectangleF(PointF.Empty, sa.Rect.Size));
            var gstampFxo = stampFxo.Graphics;
            gstampFxo.FillRectangle(stampFxo.Bounds, Color.FromArgb(40, Color.Green));
            gstampFxo.DrawString("Stamp Annotation\nassociated with minerva.jpg", tf, stampFxo.Bounds, TextAlignment.Center, ParagraphAlignment.Center);
            gstampFxo.DrawRectangle(stampFxo.Bounds, Color.Green, 3);
            //
            sa.AppearanceStreams.Normal.Default = stampFxo;
            doc.Pages [0].Annotations.Add(sa);
            ef = EmbeddedFileStream.FromFile(doc, Path.Combine("Resources", "Images", "minerva.jpg"));
            ef.ModificationDate = date;
            ef.MimeType = "image/jpeg";
            fs = FileSpecification.FromEmbeddedFile(ef);
            fs.UnicodeFile.FileName = fs.File.FileName;
            fs.Relationship = AFRelationship.Unspecified;
            doc.EmbeddedFiles.Add("minerva.jpg", fs);
            sa.AssociatedFiles.Add(fs);

            // Mark the document as conforming to Tagged PDF conventions (required for PDF/A):
            doc.MarkInfo.Marked = true;

            // Metadata.CreatorTool and DocumentInfo.Creator should be the same for a PDF/A document:
            doc.Metadata.CreatorTool = doc.DocumentInfo.Creator;
            // A title should be specified for PDF/A document:
            doc.Metadata.Title = "GcPdf Document";
            doc.ViewerPreferences.DisplayDocTitle = true;

            // Done:
            doc.Save(stream);
        }
    }
}

Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports System.Drawing
Imports System.Text
Imports GrapeCity.Documents.Text
Imports GrapeCity.Documents.Common
Imports GrapeCity.Documents.Drawing
Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Pdf.Structure
Imports GrapeCity.Documents.Pdf.MarkedContent
Imports GrapeCity.Documents.Pdf.Graphics
Imports GrapeCity.Documents.Pdf.Annotations
Imports GCTEXT = GrapeCity.Documents.Text
Imports GCDRAW = GrapeCity.Documents.Drawing
Namespace GcPdfWeb.Samples.Basics
	' This sample shows how to create a PDF/A-3u compliant document.
	Public Class PdfA
		Public Sub CreatePDF(ByVal stream As Stream)
			Dim doc = New GcPdfDocument()
			Dim [date] = New DateTime(1961, 4, 12, 6, 7, 0, DateTimeKind.Utc)

			' Mark the document as PDF/A-3u conformant:
			doc.ConformanceLevel = PdfAConformanceLevel.PdfA3u

			Dim fnt = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "arial.ttf"))
			Dim gap = 36

			' PDF/A-3a requires all content to be tagged so create and populate StructElement when rendering:
			Dim sePart As New StructElement("Part")
			doc.StructTreeRoot.Children.Add(sePart)

			Dim tl As TextLayout = Nothing
			' Add 3 pages with sample content tagged according to PDF/A rules:
			For pageNo As Integer = 1 To 3
				' add page
				Dim page = doc.Pages.Add()
				Dim g = page.Graphics
				Dim y As Single = 72
				If doc.Pages.Count = 1 Then
					' Create paragraph element:
					Dim seParagraph = New StructElement("P") With {.DefaultPage = page}
					' Add it to Part element:
					sePart.Children.Add(seParagraph)

					tl = g.CreateTextLayout()
					tl.MarginAll = 72
					tl.MaxWidth = page.Size.Width

					tl.DefaultFormat.Font = fnt
					tl.DefaultFormat.FontBold = True
					tl.DefaultFormat.FontSize = 20
					tl.Append("PDF/A-3A Document")

					' PerformLayout is done automatically in a new TextLayout or after a Clear():
					'tl.PerformLayout(true);

					' Draw TextLayout within tagged content:
					g.BeginMarkedContent(New TagMcid("P", 0))
					g.DrawTextLayout(tl, PointF.Empty)
					g.EndMarkedContent()

					y = tl.ContentRectangle.Bottom + gap

					seParagraph.ContentItems.Add(New McidContentItemLink(0))
				End If

				' Add some sample paragraphs tagged according to PDF/A rules:
				For i As Integer = 1 To 3
					' Create paragraph element:
					Dim seParagraph = New StructElement("P") With {.DefaultPage = page}
					' Add it to Part element:
					sePart.Children.Add(seParagraph)

					Dim sb = New StringBuilder()
					sb.Append(String.Format("Paragraph {0} on page {1}: ", i, pageNo))
					sb.Append(Common.Util.LoremIpsum(1, 2, 4, 5, 10))
					Dim para = sb.ToString()

					tl.Clear()
					tl.DefaultFormat.FontSize = 14
					tl.DefaultFormat.FontBold = False
					tl.MarginTop = y
					tl.Append(para)

					' Draw TextLayout within tagged content:
					g.BeginMarkedContent(New TagMcid("P", i))
					g.DrawTextLayout(tl, PointF.Empty)
					g.EndMarkedContent()

					y += tl.ContentHeight + gap

					' Add content item to paragraph StructElement:
					seParagraph.ContentItems.Add(New McidContentItemLink(i))

					' PDF/A-3 allows embedding files into document, but they should be associated with some document element
					' add embedded file associated with seParagraph:
					Dim ef1 = EmbeddedFileStream.FromBytes(doc, Encoding.UTF8.GetBytes(para))
					' ModificationDate and MimeType should be specified in case of PDF/A:
					ef1.ModificationDate = [date]
					ef1.MimeType = "text/plain"
					Dim fn = String.Format("Page{0}_Paragraph{1}.txt", pageNo, i)
					Dim fs1 = FileSpecification.FromEmbeddedStream(fn, ef1)
					' UnicodeFile.FileName should be specified for PDF/A compliance:
					fs1.UnicodeFile.FileName = fs1.File.FileName
					' Relationship should be specified in case of PDF/A:
					fs1.Relationship = AFRelationship.Unspecified
					doc.EmbeddedFiles.Add(fn, fs1)
					seParagraph.AssociatedFiles.Add(fs1)
				Next i
			Next pageNo

			' PDF/A-3 allows transparency drawing in PDF file, add some:
			Dim gpage = doc.Pages (0).Graphics
			gpage.FillRectangle(New RectangleF(20, 20, 200, 200), Color.FromArgb(40, Color.Red))

			' PDF/A-3 allows using FormXObjects, add one with transparency:
			Dim r = New RectangleF(0, 0, 144, 72)
			Dim fxo = New FormXObject(doc, r)
			Dim gfxo = fxo.Graphics
			gfxo.FillRectangle(r, Color.FromArgb(40, Color.Violet))
			Dim tf As New TextFormat() With {
				.Font = fnt,
				.FontSize = 16,
				.ForeColor = Color.FromArgb(100, Color.Black)
			}
			gfxo.DrawString("FormXObject", tf, r, TextAlignment.Center, ParagraphAlignment.Center)
			gfxo.DrawRectangle(r, Color.Blue, 3)
			gpage.DrawForm(fxo, New RectangleF(300, 250, r.Width, r.Height), Nothing, ImageAlign.ScaleImage)

			' PDF/A-3 allows using embedded files, but each embedded file must be associated with a document's element:
			Dim ef As EmbeddedFileStream = EmbeddedFileStream.FromFile(doc, Path.Combine("Resources", "WordDocs", "ProcurementLetter.docx"))
			' ModificationDate and MimeType should be specified for EmbeddedFile in PDF/A:
			ef.ModificationDate = [date]
			ef.MimeType = "application/msword"
			Dim fs = FileSpecification.FromEmbeddedFile(ef)
			fs.UnicodeFile.FileName = fs.File.FileName
			fs.Relationship = AFRelationship.Unspecified
			doc.EmbeddedFiles.Add("ProcurementLetter.docx", fs)
			' Associate embedded file with the document:
			doc.AssociatedFiles.Add(fs)

			' Add an attachment associated with an annotation:
			Dim sa = New StampAnnotation() With {
				.UserName = "Minerva",
				.Font = fnt,
				.Rect = New RectangleF(300, 36, 220, 72)
			}
			sa.Flags = sa.Flags Or AnnotationFlags.Print
			' Use a FormXObject to represent the stamp annotation:
			Dim stampFxo = New FormXObject(doc, New RectangleF(PointF.Empty, sa.Rect.Size))
			Dim gstampFxo = stampFxo.Graphics
			gstampFxo.FillRectangle(stampFxo.Bounds, Color.FromArgb(40, Color.Green))
			gstampFxo.DrawString("Stamp Annotation" & vbLf & "associated with minerva.jpg", tf, stampFxo.Bounds, TextAlignment.Center, ParagraphAlignment.Center)
			gstampFxo.DrawRectangle(stampFxo.Bounds, Color.Green, 3)
			'
			sa.AppearanceStreams.Normal.Default = stampFxo
			doc.Pages (0).Annotations.Add(sa)
			ef = EmbeddedFileStream.FromFile(doc, Path.Combine("Resources", "Images", "minerva.jpg"))
			ef.ModificationDate = [date]
			ef.MimeType = "image/jpeg"
			fs = FileSpecification.FromEmbeddedFile(ef)
			fs.UnicodeFile.FileName = fs.File.FileName
			fs.Relationship = AFRelationship.Unspecified
			doc.EmbeddedFiles.Add("minerva.jpg", fs)
			sa.AssociatedFiles.Add(fs)

			' Mark the document as conforming to Tagged PDF conventions (required for PDF/A):
			doc.MarkInfo.Marked = True

			' Metadata.CreatorTool and DocumentInfo.Creator should be the same for a PDF/A document:
			doc.Metadata.CreatorTool = doc.DocumentInfo.Creator
			' A title should be specified for PDF/A document:
			doc.Metadata.Title = "GcPdf Document"
			doc.ViewerPreferences.DisplayDocTitle = True

			' Done:
			doc.Save(stream)
		End Sub
	End Class
End Namespace