> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/uwp/get-started/samples/elementbuildertest.md). # ElementBuilder Sample C# code to use Apryse SDK's page writing API to generate new pages, embed fonts & images, and copy graphical elements from one page to another. Sample C# code to use Apryse SDK's page writing API to generate new pages, embed fonts & images, and copy graphical elements from one page to another. Learn more about our [UWP SDK](/core/get-started/frameworks/dotnet.md) and [PDF Editing & Manipulation Library](/core/page-manipulation/manipulation.md). {% tabs %} {% tab title="C#" %} {% code lineNumbers="true" %} ```csharp // // Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved. // using System; using System.IO; using System.Threading.Tasks; using Windows.Foundation; using pdftron.Common; using pdftron.Filters; using pdftron.PDF; using pdftron.SDF; using PDFNetUniversalSamples.ViewModels; namespace PDFNetSamples { public sealed class ElementBuilderTest : Sample { public ElementBuilderTest() : base("ElementBuilder", "Illustrates how to use PDFNet page writing API, how to embed fonts and images and how to copy graphical elements from one page to another.") { } public override IAsyncAction RunAsync() { return Task.Run(new System.Action(async () => { WriteLine("--------------------------------"); WriteLine("Starting ElementBuilder Test..."); WriteLine("--------------------------------\n"); try { PDFDoc doc = new PDFDoc(); ElementBuilder eb = new ElementBuilder(); // ElementBuilder is used to build new Element objects ElementWriter writer = new ElementWriter(); // ElementWriter is used to write Elements to the page // Start a new page ------------------------------------ // Position an image stream on several places on the page pdftron.PDF.Page page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 612, 794)); writer.Begin(page); // begin writing to this page // Create an Image that can be reused multiple times in the document or // multiple on the same page. MappedFile img_file = new MappedFile(Path.Combine(InputPath, "peppers.jpg")); FilterReader img_data = new FilterReader(img_file); pdftron.PDF.Image img = pdftron.PDF.Image.Create(new SDFDoc(doc), img_data, 400, 600, 8, ColorSpace.CreateDeviceRGB(), pdftron.PDF.ImageInputFilter.e_jpeg); Element element = eb.CreateImage(img, new Matrix2D(200, -145, 20, 300, 200, 150)); writer.WritePlacedElement(element); GState gstate = element.GetGState(); // use the same image (just change its matrix) gstate.SetTransform(200, 0, 0, 300, 50, 450); writer.WritePlacedElement(element); // use the same image again (just change its matrix). writer.WritePlacedElement(eb.CreateImage(img, 300, 600, 200, -150)); writer.End(); // save changes to the current page doc.PagePushBack(page); // Start a new page ------------------------------------ // Construct and draw a path object using different styles page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 612, 794)); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset GState to default eb.PathBegin(); // start constructing the path eb.MoveTo(306, 396); eb.CurveTo(681, 771, 399.75, 864.75, 306, 771); eb.CurveTo(212.25, 864.75, -69, 771, 306, 396); eb.ClosePath(); element = eb.PathEnd(); // the path is now finished element.SetPathFill(true); // the path should be filled // Set the path color space and color gstate = element.GetGState(); gstate.SetFillColorSpace(ColorSpace.CreateDeviceCMYK()); gstate.SetFillColor(new ColorPt(1, 0, 0, 0)); // cyan gstate.SetTransform(0.5, 0, 0, 0.5, -20, 300); writer.WritePlacedElement(element); // Draw the same path using a different stroke color element.SetPathStroke(true); // this path is should be filled and stroked gstate.SetFillColor(new ColorPt(0, 0, 1, 0)); // yellow gstate.SetStrokeColorSpace(ColorSpace.CreateDeviceRGB()); gstate.SetStrokeColor(new ColorPt(1, 0, 0)); // red gstate.SetTransform(0.5, 0, 0, 0.5, 280, 300); gstate.SetLineWidth(20); writer.WritePlacedElement(element); // Draw the same path with with a given dash pattern element.SetPathFill(false); // this path is should be only stroked gstate.SetStrokeColor(new ColorPt(0, 0, 1)); // blue gstate.SetTransform(0.5, 0, 0, 0.5, 280, 0); double[] dash_pattern = { 30 }; gstate.SetDashPattern(dash_pattern, 0); writer.WritePlacedElement(element); // Use the path as a clipping path writer.WriteElement(eb.CreateGroupBegin()); // Save the graphics state // Start constructing a new path (the old path was lost when we created // a new Element using CreateGroupBegin()). eb.PathBegin(); eb.MoveTo(306, 396); eb.CurveTo(681, 771, 399.75, 864.75, 306, 771); eb.CurveTo(212.25, 864.75, -69, 771, 306, 396); eb.ClosePath(); element = eb.PathEnd(); // path is now built element.SetPathClip(true); // this path is a clipping path element.SetPathStroke(true); // this path is should be filled and stroked gstate = element.GetGState(); gstate.SetTransform(0.5, 0, 0, 0.5, -20, 0); writer.WriteElement(element); writer.WriteElement(eb.CreateImage(img, 100, 300, 400, 600)); writer.WriteElement(eb.CreateGroupEnd()); // Restore the graphics state writer.End(); // save changes to the current page doc.PagePushBack(page); // Start a new page ------------------------------------ page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 612, 794)); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset GState to default // Begin writing a block of text element = eb.CreateTextBegin(Font.Create(doc.GetSDFDoc(), FontStandardType1Font.e_times_roman), 12); writer.WriteElement(element); string data = "Hello World!"; element = eb.CreateTextRun(data); element.SetTextMatrix(10, 0, 0, 10, 0, 600); element.GetGState().SetLeading(15); // Set the spacing between lines writer.WriteElement(element); writer.WriteElement(eb.CreateTextNewLine()); // New line element = eb.CreateTextRun(data); gstate = element.GetGState(); gstate.SetTextRenderMode(GStateTextRenderingMode.e_stroke_text); gstate.SetCharSpacing(-1.25); gstate.SetWordSpacing(-1.25); writer.WriteElement(element); writer.WriteElement(eb.CreateTextNewLine()); // New line element = eb.CreateTextRun(data); gstate = element.GetGState(); gstate.SetCharSpacing(0); gstate.SetWordSpacing(0); gstate.SetLineWidth(3); gstate.SetTextRenderMode(GStateTextRenderingMode.e_fill_stroke_text); gstate.SetStrokeColorSpace(ColorSpace.CreateDeviceRGB()); gstate.SetStrokeColor(new ColorPt(1, 0, 0)); // red gstate.SetFillColorSpace(ColorSpace.CreateDeviceCMYK()); gstate.SetFillColor(new ColorPt(1, 0, 0, 0)); // cyan writer.WriteElement(element); writer.WriteElement(eb.CreateTextNewLine()); // New line // Set text as a clipping path to the image. element = eb.CreateTextRun(data); gstate = element.GetGState(); gstate.SetTextRenderMode(GStateTextRenderingMode.e_clip_text); writer.WriteElement(element); // Finish the block of text writer.WriteElement(eb.CreateTextEnd()); // Draw an image that will be clipped by the above text writer.WriteElement(eb.CreateImage(img, 10, 100, 1300, 720)); writer.End(); // save changes to the current page doc.PagePushBack(page); // Start a new page ------------------------------------ // // The example illustrates how to embed the external font in a PDF document. // The example also shows how ElementReader can be used to copy and modify // Elements between pages. ElementReader reader = new ElementReader(); // Start reading Elements from the last page. We will copy all Elements to // a new page but will modify the font associated with text. reader.Begin(doc.GetPage(doc.GetPageCount())); page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 1300, 794)); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset GState to default // Embed an external font in the document. Font font = Font.CreateTrueTypeFont(doc, Path.Combine(InputPath, "font.ttf")); while ((element = reader.Next()) != null) // Read page contents { if (element.GetType() == ElementType.e_text) { element.GetGState().SetFont(font, 12); } writer.WriteElement(element); } reader.End(); writer.End(); // save changes to the current page doc.PagePushBack(page); // Start a new page ------------------------------------ // // The example illustrates how to embed the external font in a PDF document. // The example also shows how ElementReader can be used to copy and modify // Elements between pages. // Start reading Elements from the last page. We will copy all Elements to // a new page but will modify the font associated with text. reader.Begin(doc.GetPage(doc.GetPageCount())); page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 1300, 794)); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset GState to default // Embed an external font in the document. Font font2 = Font.CreateType1Font(doc, Path.Combine(InputPath, "Misc-Fixed.pfa")); while ((element = reader.Next()) != null) // Read page contents { if (element.GetType() == ElementType.e_text) { element.GetGState().SetFont(font2, 12); } writer.WriteElement(element); } reader.End(); writer.End(); // save changes to the current page doc.PagePushBack(page); // Start a new page ------------------------------------ page = doc.PageCreate(); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset GState to default // Begin writing a block of text //System.Drawing.Font sys_font = new System.Drawing.Font("Comic Sans MS", 12); //Font my_font = Font.CreateTrueTypeFont(doc, sys_font, false, false); Font my_font = Font.Create(doc, pdftron.PDF.FontStandardType1Font.e_times_roman); element = eb.CreateTextBegin(my_font, 12); element.SetTextMatrix(1.5, 0, 0, 1.5, 50, 600); element.GetGState().SetLeading(15); // Set the spacing between lines writer.WriteElement(element); string para = "A PDF text object consists of operators that can show " + "text strings, move the text position, and set text state and certain " + "other parameters. In addition, there are three parameters that are " + "defined only within a text object and do not persist from one text " + "object to the next: Tm, the text matrix, Tlm, the text line matrix, " + "Trm, the text rendering matrix, actually just an intermediate result " + "that combines the effects of text state parameters, the text matrix " + "(Tm), and the current transformation matrix"; int para_end = para.Length; int text_run = 0; int text_run_end; double para_width = 300; // paragraph width is 300 units double cur_width = 0; while (text_run < para_end) { text_run_end = para.IndexOf(' ', text_run); if (text_run_end < 0) text_run_end = para_end - 1; string text = para.Substring(text_run, text_run_end - text_run + 1); element = eb.CreateTextRun(text); if (cur_width + element.GetTextLength() < para_width) { writer.WriteElement(element); cur_width += element.GetTextLength(); } else { writer.WriteElement(eb.CreateTextNewLine()); // New line text = para.Substring(text_run, text_run_end - text_run + 1); element = eb.CreateTextRun(text); cur_width = element.GetTextLength(); writer.WriteElement(element); } text_run = text_run_end + 1; } // Draw the same strings using direct content output... writer.Flush(); // flush pending Element writing operations. // You can also write page content directly to the content stream using // ElementWriter.WriteString(...) and ElementWriter.WriteBuffer(...) methods. // Note that if you are planning to use these functions you need to be familiar // with PDF page content operators (see Appendix A in PDF Reference Manual). // Because it is easy to make mistakes during direct output we recommend that // you use ElementBuilder and Element interface instead. writer.WriteString("T* T* T* "); // New Lines writer.WriteElement(eb.CreateTextNewLine()); writer.WriteString("(Direct output to PDF page content stream:) Tj T* "); writer.WriteString("(AWAY) Tj T* "); writer.WriteString("[(A)140(W)140(A)115(Y again)] TJ "); // Finish the block of text writer.WriteElement(eb.CreateTextEnd()); writer.End(); // save changes to the current page doc.PagePushBack(page); // Transparency sample ---------------------------------- // Start a new page ------------------------------------- page = doc.PageCreate(); writer.Begin(page); // begin writing to this page eb.Reset(); // Reset the GState to default // Write some transparent text at the bottom of the page. element = eb.CreateTextBegin(Font.Create(doc.GetSDFDoc(), FontStandardType1Font.e_times_roman), 100); // Set the text knockout attribute. Text knockout must be set outside of // the text group. gstate = element.GetGState(); gstate.SetTextKnockout(false); gstate.SetBlendMode(GStateBlendMode.e_bl_difference); writer.WriteElement(element); element = eb.CreateTextRun("Transparency"); element.SetTextMatrix(1, 0, 0, 1, 30, 30); gstate = element.GetGState(); gstate.SetFillColorSpace(ColorSpace.CreateDeviceCMYK()); gstate.SetFillColor(new ColorPt(1, 0, 0, 0)); gstate.SetFillOpacity(0.5); writer.WriteElement(element); // Write the same text on top the old; shifted by 3 points element.SetTextMatrix(1, 0, 0, 1, 33, 33); gstate.SetFillColor(new ColorPt(0, 1, 0, 0)); gstate.SetFillOpacity(0.5); writer.WriteElement(element); writer.WriteElement(eb.CreateTextEnd()); // Draw three overlapping transparent circles. eb.PathBegin(); // start constructing the path eb.MoveTo(459.223, 505.646); eb.CurveTo(459.223, 415.841, 389.85, 343.04, 304.273, 343.04); eb.CurveTo(218.697, 343.04, 149.324, 415.841, 149.324, 505.646); eb.CurveTo(149.324, 595.45, 218.697, 668.25, 304.273, 668.25); eb.CurveTo(389.85, 668.25, 459.223, 595.45, 459.223, 505.646); element = eb.PathEnd(); element.SetPathFill(true); gstate = element.GetGState(); gstate.SetFillColorSpace(ColorSpace.CreateDeviceRGB()); gstate.SetFillColor(new ColorPt(0, 0, 1)); // Blue Circle gstate.SetBlendMode(GStateBlendMode.e_bl_normal); gstate.SetFillOpacity(0.5); writer.WriteElement(element); // Translate relative to the Blue Circle gstate.SetTransform(1, 0, 0, 1, 113, -185); gstate.SetFillColor(new ColorPt(0, 1, 0)); // Green Circle gstate.SetFillOpacity(0.5); writer.WriteElement(element); // Translate relative to the Green Circle gstate.SetTransform(1, 0, 0, 1, -220, 0); gstate.SetFillColor(new ColorPt(1, 0, 0)); // Red Circle gstate.SetFillOpacity(0.5); writer.WriteElement(element); writer.End(); // save changes to the current page doc.PagePushBack(page); // End page ------------------------------------ String output_file_path = Path.Combine(OutputPath, "element_builder.pdf"); await doc.SaveAsync(output_file_path, SDFDocSaveOptions.e_remove_unused); doc.Destroy(); WriteLine("Done. Result saved in " + output_file_path); await AddFileToOutputList(output_file_path).ConfigureAwait(false); } catch (Exception e) { WriteLine(GetExceptionMessage(e)); } WriteLine("\n--------------------------------"); WriteLine("Done ElementBuilder Test."); WriteLine("--------------------------------\n"); })).AsAsyncAction(); } } } ``` {% endcode %} {% endtab %} {% endtabs %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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