//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Recognition;using GrapeCity.Documents.Text;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos{    // Extract data from a table.    public class GetTablePages    {        public int CreatePDF(Stream stream)        {            const float DPI = 72;            const float margin = 36;            var doc = new GcPdfDocument();
            var tf = new TextFormat()            {                Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSans-Regular.ttf")),                FontSize = 9,                ForeColor = Color.Black            };            var tfHdr = new TextFormat(tf)            {                Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSans-Bold.ttf")),                FontSize = 11,                ForeColor = Color.DarkBlue            };            var tfRed = new TextFormat(tf) { ForeColor = Color.Red };
            using (var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "product-list.pdf")))            {                var page = doc.NewPage();                page.Landscape = true;                var g = page.Graphics;
                var rc = Common.Util.AddNote(                    "This sample loads a PDF that contains a table split between several pages (a product price list), " +                    "and extracts the tables on all pages using the Page.GetTable() method. " +                    "The extracted data is printed as a list of rows and cells. " +                    "The source product list PDF is appended to the generated document for reference.",                    page,                    new RectangleF(margin, margin, page.Bounds.Width - margin * 2, page.Bounds.Height - margin * 2));
                var tl = g.CreateTextLayout();                tl.MaxWidth = page.Bounds.Width;                tl.MaxHeight = page.Bounds.Height;                tl.MarginAll = margin;                tl.MarginTop = rc.Bottom;                tl.DefaultTabStops = 165;
                var docSrc = new GcPdfDocument();                docSrc.Load(fs);
                for (int i = 0; i < docSrc.Pages.Count; ++i)                {                    // TableExtractOptions allow you to fine-tune table recognition accounting for                    // specifics of the table formatting:                    var teo = new TableExtractOptions();                    var GetMinimumDistanceBetweenRows = teo.GetMinimumDistanceBetweenRows;                    // In this particular case, we slightly increase the minimum distance between rows                    // to make sure cells with wrapped text are not mistaken for two cells:                    teo.GetMinimumDistanceBetweenRows = (list) => {                        var res = GetMinimumDistanceBetweenRows(list);                        return res * 1.2f;                    };                    var top = i == 0 ? DPI * 2 : DPI;                    // Get the table at the specified bounds:                    var itable = docSrc.Pages[i].GetTable(new RectangleF(DPI * 0.25f, top, DPI * 8, DPI * 10.5f - top), teo);
                    // Add table data to the text layout:                    tl.Append($"\nTable on page {i + 1} of the source document has {itable.Cols.Count} column(s) and {itable.Rows.Count} row(s), table data is:", tfHdr);                    tl.AppendParagraphBreak();                    for (int row = 0; row < itable.Rows.Count; ++row)                    {                        var tfmt = row == 0 ? tfHdr : tf;                        for (int col = 0; col < itable.Cols.Count; ++col)                        {                            var cell = itable.GetCell(row, col);                            if (col > 0)                                tl.Append("\t", tfmt);                            if (cell == null)                                tl.Append("<no cell>", tfRed);                            else                                tl.Append(cell.Text, tfmt);                        }                        tl.AppendLine();                    }                }
                // Print the extracted data:                var to = new TextSplitOptions(tl) { RestMarginTop = margin, MinLinesInFirstParagraph = 2, MinLinesInLastParagraph = 2 };                tl.PerformLayout(true);                while (true)                {                    var splitResult = tl.Split(to, out TextLayout rest);                    doc.Pages.Last.Graphics.DrawTextLayout(tl, PointF.Empty);                    if (splitResult != SplitResult.Split)                        break;                    tl = rest;                    doc.NewPage().Landscape = true;                }
                // Append the original document for reference:                doc.MergeWithDocument(docSrc);
                doc.Save(stream);                return doc.Pages.Count;            }        }    }}