MergeOptions option= new MergeOptions();
PdfMerger.Merge(new string[] { file1, file2, file2, file2 }, output, option);

 from spire.pdf import *

  pdf = PdfDocument()
  builder = PdfContentBuilder(pdf)

  template = PdfPageTemplate()
  template.SetHeader("Product Manual", PdfTextAlignment.Center)
  template.SetFooter("Page {page} of {totalPages}", PdfTextAlignment.Center)
  section = builder.AddSection(template)

  section.AddHeading1("1. Introduction")
  section.AddParagraph("Content flows across pages automatically.")
  section.AddBulletList(["Fast", "Stable", "Easy to use"])

  builder.Build()
  pdf.SaveToFile("output.pdf")
  pdf.Close()

ConvertOptions options = new ConvertOptions();
options.setAllowedFonts(new String[] { "Times New Roman", "Arial" });
converter.convertToPdf(input, output, options);

PdfDocument doc = new PdfDocument();
        PdfPageBase page = doc.getPages().add();

        PdfGrid grid = new PdfGrid();
        grid.getStyle().setCellSpacing(1.0f);
        PdfGridRow row = grid.getRows().add();
        grid.getColumns().add(2);

        float width = (float) page.getCanvas().getClientSize().getWidth()-(grid.getColumns().getCount() + 1);

        grid.getColumns().get(0).setWidth(width * 0.8f);
        PdfGridCell pdfGridCell = row.getCells().get(0);
        PdfGridCellStyle pdfGridStyle =new PdfGridCellStyle();
        PdfPen pen = PdfPens.getGreen();
        pdfGridStyle.setTextPen(pen);
        pdfGridStyle.setTextBrush(PdfBrushes.getBlack());
        Font font=new Font("方正仿宋_GBK", Font.PLAIN, 12);
        PdfTrueTypeFont trueTypeFont = new PdfTrueTypeFont(font, true);
        pdfGridStyle.setFont(trueTypeFont);
        pdfGridCell.setStyle(pdfGridStyle);
        pdfGridCell.setValue("Thank you for interest in Spire.PDF.");



        PdfGridCellContentList lst = new PdfGridCellContentList();
        PdfGridCellContent textAndStyle = new PdfGridCellContent();
        textAndStyle.setText("Thank you for interest in Spire.PDF.");
        textAndStyle.setFont(trueTypeFont);
        textAndStyle.setPen(PdfPens.Green());
        textAndStyle.setBrush(PdfBrushes.getGreen());
        lst.getList().add(textAndStyle);
        row.getCells().get(1).setValue(lst);

        PdfLayoutResult result = grid.draw(page, new Point2D.Float(10, 100));
        doc.saveToFile("result_Bold.pdf", FileFormat.PDF);

SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 6.0.0
HarfBuzzSharp >=8.3.0.1

SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 9.0.0
HarfBuzzSharp >=8.3.0.1

SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 10.0.0
HarfBuzzSharp >=8.3.0.1

using (Image image = doc.SaveAsImage )
{ image.Save(fileName, System.Drawing.Imaging.ImageFormat.Png); }

using (var image = doc.SaveAsImage )
{ string filename = String.Format(outputFile + i + ".png"); 
System.IO.FileStream fileStream = new 
System.IO.FileStream(fileName, 
System.IO.FileMode.Create, System.IO.FileAccess.Write);
image.CopyTo(fileStream); fileStream.Flush(); }

net6.0 Has external reference to SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 6.0.0
HarfBuzzSharp >=8.3.0.1
net9.0 Has external reference to SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 9.0.0
HarfBuzzSharp >=8.3.0.1
net10.0 Has external reference to SkiaSharp >= 3.116.1
Microsoft.Win32.Registry >= 5.0.0
System.Buffers >= 4.5.1
System.Memory >= 4.5.5
System.Text.Encoding.CodePages >= 10.0.0
HarfBuzzSharp >=8.3.0.1

Image img = document.SaveToImages(0, ImageType.Bitmap);
img.Save("sample.png", ImageFormat.Png);

SkiaSharp.SKImage images = document.SaveToImages(0, ImageType.Bitmap);
FileStream fileStream = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
images.Encode(SkiaSharp.SKEncodedImageFormat.Png, 100).SaveTo(fileStream);
fileStream.Flush();

// Create a new document and apply the theme
Document doc = new Document();

// Configure a custom theme
Theme theme = doc.Theme;
theme.MajorFonts.Latin = "Courier New";  // Set the heading font to Courier New
theme.MinorFonts.Latin = "Agency FB";    // Set the body font to Agency FB

ThemeColors colors = theme.Colors;
colors.Dark1 = Color.MidnightBlue;
colors.Light1 = Color.PaleGreen;
colors.Dark2 = Color.Indigo;
colors.Light2 = Color.Khaki;
colors.Accent1 = Color.OrangeRed;
colors.Accent2 = Color.LightSalmon;
colors.Accent3 = Color.Yellow;
colors.Accent4 = Color.Gold;
colors.Accent5 = Color.BlueViolet;
colors.Accent6 = Color.DarkViolet;
colors.Hyperlink = Color.Black;
colors.FollowedHyperlink = Color.Gray;

Section section = doc.AddSection();

// Create a heading and apply MajorFonts and the Accent1 color
Paragraph heading = section.AddParagraph();
heading.AppendText("Document Theme Test");
heading.ApplyStyle(BuiltinStyle.Heading1);

// Link the heading style to MajorFonts
ParagraphStyle heading1Style = (ParagraphStyle)doc.Styles["Heading 1"];
heading1Style.CharacterFormat.ThemeFont = ThemeFont.Major;  // Use the Major theme font (heading font)
heading1Style.CharacterFormat.ThemeColor = ThemeColor.Accent1; // Use the Accent1 theme color

// Create a body paragraph and apply MinorFonts
Paragraph body = section.AddParagraph();
body.AppendText("This document uses a custom theme created programmatically.");

// Link the Normal style to MinorFonts
ParagraphStyle normalStyle = (ParagraphStyle)doc.Styles["Normal"];
normalStyle.CharacterFormat.ThemeFont = ThemeFont.Minor;  // Use the Minor theme font (body font)
normalStyle.CharacterFormat.ThemeColor = ThemeColor.Text1; // Use the default text color
                                                           // Add a test paragraph to verify the theme color
Paragraph colorTest = section.AddParagraph();
TextRange textRange = colorTest.AppendText("Accent1 Color Test");
textRange.CharacterFormat.ThemeColor = ThemeColor.Accent1; // Use the Accent1 theme color directly

doc.SaveToFile(outputFile, FileFormat.Docx);
doc.Close();

// Load the source document and get its theme
Document sourceDoc = new Document();
sourceDoc.LoadFromFile("Theme.docx");
Theme sourceTheme = sourceDoc.Theme;

// Create a destination document
Document newDoc = new Document();

// Copy the source document's theme (theme fonts and colors) to the destination document
sourceDoc.CloneThemesTo(newDoc);

newDoc.SaveToFile("CopyTheme.docx", FileFormat.Docx);

Document doc = new Document();

// Set the font faces of the document theme
doc.Theme.MinorFonts.Latin = "Algerian";
doc.Theme.MinorFonts.EastAsian = "Aharoni";
doc.Theme.MinorFonts.ComplexScript = "Andalus";

// Set the theme font and theme color of the style's character format
CharacterFormat font = ((ParagraphStyle)doc.Styles["Normal"]).CharacterFormat;
font.ThemeFont = ThemeFont.Minor;
font.ThemeColor = ThemeColor.Accent2;

// Get the theme font and theme color
ThemeFont themeFont = font.ThemeFont;
string fontName = font.FontName;
Color textColor = font.TextColor;

doc.SaveToFile("ThemeAttributes.docx", FileFormat.Docx);

doc.setEmbedFontsInFile(true);
doc.setSaveSubsetFonts(true); 

// Create a document and add a column chart
Document doc = new Document();
Section section = doc.AddSection();
ShapeObject shape = section.AddParagraph().AppendChart(ChartType.Column, 500, 300);
Chart chart = shape.Chart;
chart.Series.Clear();
chart.Series.Add("Sales", new string[] { "Q1", "Q2", "Q3", "Q4" }, new double[] { 120, 90, 160, 200 });

// Chart area - solid fill
chart.Format.Fill.FillType = FillType.Solid;
chart.Format.Fill.Color = Color.OrangeRed;
chart.Format.Fill.Transparency = 0.3;

// Data points of the first series - linear gradient fill
Fill seriesFill = chart.Series[0].DataPoints.Format.Fill;
seriesFill.FillType = FillType.Shade;
seriesFill.GradientType = GradientFillType.Linear;
seriesFill.SetGradientDirection(GradientFillDirection.LinearUp);
seriesFill.GradientStops.Add(new GradientStop(0, Color.White));
seriesFill.GradientStops.Add(new GradientStop(1, Color.OrangeRed));

// Data labels - enable and use a solid fill
chart.Series[0].HasDataLabels = true;
chart.Series[0].DataLabels.Format.Fill.FillType = FillType.Solid;
chart.Series[0].DataLabels.Format.Fill.Color = Color.LightYellow;

doc.SaveToFile("ChartFill.docx", FileFormat.Docx);

// Create a document and add a line chart
Document doc = new Document();
Section section = doc.AddSection();
ShapeObject shape = section.AddParagraph().AppendChart(ChartType.Line, 500, 300);
Chart chart = shape.Chart;
chart.Series.Clear();
chart.Series.Add("Trend", new string[] { "Cat1", "Cat2", "Cat3", "Cat4" }, new double[] { 4.3, 2.4, 3.1, 5.2 });

// Chart area - border weight, dash style and solid color
chart.Format.Stroke.Weight = 2;
chart.Format.Stroke.DashStyle = DashStyle.Dash;
chart.Format.Stroke.Fill.FillType = FillType.Solid;
chart.Format.Stroke.Fill.Color = Color.Blue;

// Data series border - set through its data points
chart.Series[0].DataPoints.Format.Stroke.Fill.FillType = FillType.Solid;
chart.Series[0].DataPoints.Format.Stroke.Fill.Color = Color.Red;
chart.Series[0].DataPoints.Format.Stroke.Weight = 1.5;

// Start and end arrows on the axes
chart.AxisX.Format.Stroke.StartArrowType = ArrowType.Arrow;
chart.AxisX.Format.Stroke.EndArrowType = ArrowType.Arrow;
chart.AxisY.Format.Stroke.StartArrowType = ArrowType.Arrow;
chart.AxisY.Format.Stroke.EndArrowType = ArrowType.Arrow;

doc.SaveToFile("ChartStroke.docx", FileFormat.Docx);

using Spire.Doc;
using Spire.Doc.Importing;

var importOptions = new ImportOptions { Password = "123456" };
var doc = new Document();
doc.LoadFromFile("encrypted.docx", importOptions);

using Spire.Doc;
using Spire.Doc.Importing;

// Implement the asset loading callback
public class MyAssetLoader : IAssetLoadingCallback
{
    public AssetLoadingAction AssetLoading(AssetLoadingArgs args)
    {
        // Block tracking images
        if (args.Url.Contains("tracker"))
            return AssetLoadingAction.Block;

        // Provide custom image data with authentication
        if (args.AssetType == AssetType.Image && args.Url.StartsWith("https://api."))
        {
            var data = LoadWithAuth(args.Url);
            args.SetData(data);
            return AssetLoadingAction.Custom;
        }

        // Redirect CDN addresses
        if (args.Url.Contains("cdn.example.com"))
        {
            args.Url = args.Url.Replace("cdn.example.com", "local.mirror.com");
            return AssetLoadingAction.Download;
        }

        // Default behavior: download from the original URL
        return AssetLoadingAction.Download;
    }
}

// Load a document using the callback
var doc = new Document();
var options = new ImportOptions
{
    AssetLoadingCallback = new MyAssetLoader()
};
doc.LoadFromFile("document.html", options);

using Spire.Doc;
using Spire.Doc.Exporting;

var doc = new Document();
doc.LoadFromFile("input.docx");

// Use the default DOC format
//var options = new DocExportOptions();
// Use the default DOCX format
var options = new DocxExportOptions();
doc.SaveToFile("output.docx", options);

// Specify Word 2019 format
doc.SaveToFile("output.docx", new DocxExportOptions(FileFormat.Docx2019));

using Spire.Doc;
using Spire.Doc.Exporting;

// 1. Implement the progress callback interface
public class ProgressReporter : IExportingProgressCallback
{
    public void OnProgress(ExportingProgressArgs args)
    {
        // EstimatedProgressPercentage ranges from 0 to 100
        Console.WriteLine($"Progress: {args.EstimatedProgressPercentage:F1}%");

        // Throw an exception here if you need to abort the saving process
    }
}

// 2. Set the callback and export
var doc = new Document();
doc.LoadFromFile("large-document.docx");

var options = new DocxExportOptions(FileFormat.Docx)
{
    ProgressCallback = new ProgressReporter()
};

doc.SaveToFile("output.docx", options);

Document doc = ConvertUtil.GetNewEngineDocument();
            Section section = doc.AddSection();

            ParagraphStyle heading1 = (ParagraphStyle)doc.Styles["Heading 1"];
            Assert.IsFalse(heading1.ParagraphFormat.NoSpaceBetweenSameStyle);
            heading1.ParagraphFormat.NoSpaceBetweenSameStyle = true;

            Spire.Doc.Documents.Paragraph sameStyle1 = AddParagraph(section, SameStyleText1, BuiltinStyle.Heading1);
            Spire.Doc.Documents.Paragraph sameStyle2 = AddParagraph(section, SameStyleText2, BuiltinStyle.Heading1);
            Spire.Doc.Documents.Paragraph otherStyle = AddParagraph(section, OtherStyleText, BuiltinStyle.Heading2);
            doc.SaveToFile(outputFile_temp, FileFormat.Docx);

Document doc = new Document();
    Section sec = doc.AddSection();
    Paragraph para = sec.AddParagraph();
    para.AppendHTML("<p style=\"color:hsl(0,75%,60%)\">Hello</p>");
    doc.SaveToFile("HtmlTest_hsl.docx");

Document doc = new Document();
            doc.LoadFromFile(@"input.docx");

            foreach (Paragraph para in doc.Sections[0].Paragraphs)
            {
                foreach (DocumentObject obj in para.ChildObjects)
                {
                    if (obj is ShapeObject shape && shape.Chart != null)
                    {
                        Chart chart = shape.Chart;

                        // Remove the border of the chart area
                        chart.Format.Stroke.Fill.FillType = FillType.NoFill;
                    }
                }
            }

            doc.SaveToFile("NoBorder.docx", FileFormat.Docx);

sheet.Range["F1:H4"].FormulaArray = "=TRANSPOSE(A2:D4)";  

Presentation ppt = new Presentation();
 IAutoShape autoShape = ppt.Slides[0].Shapes.AppendShape(ShapeType.Rectangle, new RectangleF(100, 100, 300, 200));
 string txtContent = File.ReadAllText(inputFile);
 autoShape.TextFrame.Paragraphs.AppendOfficeMathML(txtContent);
 ppt.SaveToFile(outputFile, FileFormat.Pptx2013);        
 ppt.Dispose(); 

// Create a pdf document
PdfDocument pdf = new PdfDocument();

// Create a content builder
PdfContentBuilder builder = new PdfContentBuilder(pdf);

// Add the first section
var s1 = builder.AddSection();
s1.AddHeading1("Section One");
s1.AddParagraph("First flowing paragraph.");

// Add the second section
var s2 = builder.AddSection();
s2.AddHeading1("Section Two");
s2.AddParagraph("Second flowing paragraph.");

// Add the third section (paragraph only)
var s3 = builder.AddSection();
s3.AddParagraph("Third section, only a paragraph.");

// Add the fourth section with headings and navigation entries
var s4 = builder.AddSection();
var h1 = s4.AddHeading(1, "Alpha Chapter");
var h2 = s4.AddHeading(2, "Beta Section");
var h3 = s4.AddHeading(3, "Gamma Subsection");
h1.AsNavigationEntry("Alpha Chapter", 1);
h2.AsNavigationEntry("Beta Section", 2);
h3.AsNavigationEntry("Gamma Subsection", 3);
s4.AddParagraph("Body copy under the headings.");

// Build the document
var result = builder.Build();

// Save the document
String outputFile = "Bug_1_MultipleSections.pdf";
pdf.SaveToFile(outputFile);
pdf.Close();

PdfDocument doc = new PdfDocument();
PdfPageBase page = doc.Pages.Add();
RectangleF rect = new RectangleF(140, 689, 80, 1);
PdfLineAnnotation lineAnnotation = new PdfLineAnnotation(page, rect, new PointF(140, 690), new PointF(220, 690));
lineAnnotation.Contents = "This is the first line annotation";
// New way
PdfAnnotationCollection anmotationCollection = PdfAnnotationCollection.Create(page);
anmotationCollection.Add(lineAnnotation);
// Old way
//page.AnnotationsV2.Add(lineAnnotation);

TextWatermark wm = new TextWatermark(document);
wm.setText("Watermark");
// Automatic font size
wm.setFontSize(0); 
document.setWatermark(wm);

/ Add rich text
cellContent1.setRichText("<html><body><p style='color:black; font-size:14pt;'>Hello World</p></body></html>");

InputStream fileStream = new FileInputStream(inputFile);
PdfToWordConverter convert = new PdfToWordConverter(fileStream);
convert.saveToDocx(outputFile);