// // This code is part of Document Solutions for PDF demos. // Copyright (c) MESCIUS inc. All rights reserved. // using System; using System.IO; using System.Drawing; using GrapeCity.Documents.Pdf; using GrapeCity.Documents.Text; namespace DsPdfWeb.Demos.Basics { // This sample shows how to prevent a page break between a paragraph // and the next one when splitting a TextLayout. // Splitting of text in this sample is similar to that in PaginatedText, // see comments in PaginatedText for more info on text handling. public class KeepWithNext { public int CreatePDF(Stream stream) { const int NPAR = 40; var doc = new GcPdfDocument(); var tl = new TextLayout(72) { FirstLineIndent = 72 / 2, MaxWidth = doc.PageSize.Width, MaxHeight = doc.PageSize.Height, MarginAll = 72, }; tl.DefaultFormat.Font = StandardFonts.Times; tl.DefaultFormat.FontSize = 12; // Text format for paragraphs kept together with next one: var tf = new TextFormat(tl.DefaultFormat) { FontSize = tl.DefaultFormat.FontSize + 2, FontBold = true }; // We add a number of random 'lorem ipsum' paragraphs to this document, // adding a 'caption' before each paragraph which is kept together // with the following 'lorem ipsum' paragraph: for (int i = 0; i < NPAR; i++) { // 'Caption' kept together with the next paragraph: tl.Append("Caption kept together with the next paragraph. No page break after this.", tf); // AppendParagraphBreak adds a paragraph break but prevents a page break between the two paragraphs: tl.AppendParagraphBreak(); // Random paragraph after 'caption': tl.Append(Common.Util.LoremIpsum(1)); } tl.PerformLayout(true); // We force all paragraph lines to stay on the same page, // this makes it more obvious that 'caption' and following paragraph // are kept on the same page: var to = new TextSplitOptions(tl) { KeepParagraphLinesTogether = true, }; // In a loop, split and render the text: while (true) { // 'rest' will accept the text that did not fit: var splitResult = tl.Split(to, out TextLayout rest); doc.Pages.Add().Graphics.DrawTextLayout(tl, PointF.Empty); if (splitResult != SplitResult.Split) break; tl = rest; } // Done: doc.Save(stream); return doc.Pages.Count; } } }