UpdatePageNumbers

FieldToc.UpdatePageNumbers method

Updates the page numbers for items in this table of contents.

public bool UpdatePageNumbers()

Return Value

true if the operation is successful. If any of the related TOC bookmarks was removed, false will be returned.

Examples

Shows how to insert a TOC, and populate it with entries based on heading styles.

public void FieldToc()
{
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    builder.StartBookmark("MyBookmark");

    // Insert a TOC field, which will compile all headings into a table of contents.
    // For each heading, this field will create a line with the text in that heading style to the left,
    // and the page the heading appears on to the right.
    FieldToc field = (FieldToc)builder.InsertField(FieldType.FieldTOC, true);

    // Use the BookmarkName property to only list headings
    // that appear within the bounds of a bookmark with the "MyBookmark" name.
    field.BookmarkName = "MyBookmark";

    // Text with a built-in heading style, such as "Heading 1", applied to it will count as a heading.
    // We can name additional styles to be picked up as headings by the TOC in this property and their TOC levels.
    field.CustomStyles = "Quote; 6; Intense Quote; 7";

    // By default, Styles/TOC levels are separated in the CustomStyles property by a comma,
    // but we can set a custom delimiter in this property.
    doc.FieldOptions.CustomTocStyleSeparator = ";";

    // Configure the field to exclude any headings that have TOC levels outside of this range.
    field.HeadingLevelRange = "1-3";

    // The TOC will not display the page numbers of headings whose TOC levels are within this range.
    field.PageNumberOmittingLevelRange = "2-5";

    // Set a custom string that will separate every heading from its page number. 
    field.EntrySeparator = "-";
    field.InsertHyperlinks = true;
    field.HideInWebLayout = false;
    field.PreserveLineBreaks = true;
    field.PreserveTabs = true;
    field.UseParagraphOutlineLevel = false;

    InsertNewPageWithHeading(builder, "First entry", "Heading 1");
    builder.Writeln("Paragraph text.");
    InsertNewPageWithHeading(builder, "Second entry", "Heading 1");
    InsertNewPageWithHeading(builder, "Third entry", "Quote");
    InsertNewPageWithHeading(builder, "Fourth entry", "Intense Quote");

    // These two headings will have the page numbers omitted because they are within the "2-5" range.
    InsertNewPageWithHeading(builder, "Fifth entry", "Heading 2");
    InsertNewPageWithHeading(builder, "Sixth entry", "Heading 3");

    // This entry does not appear because "Heading 4" is outside of the "1-3" range that we have set earlier.
    InsertNewPageWithHeading(builder, "Seventh entry", "Heading 4");

    builder.EndBookmark("MyBookmark");
    builder.Writeln("Paragraph text.");

    // This entry does not appear because it is outside the bookmark specified by the TOC.
    InsertNewPageWithHeading(builder, "Eighth entry", "Heading 1");

    Assert.AreEqual(" TOC  \\b MyBookmark \\t \"Quote; 6; Intense Quote; 7\" \\o 1-3 \\n 2-5 \\p - \\h \\x \\w", field.GetFieldCode());

    field.UpdatePageNumbers();
    doc.UpdateFields();
    doc.Save(ArtifactsDir + "Field.TOC.docx");
}

/// <summary>
/// Start a new page and insert a paragraph of a specified style.
/// </summary>
public void InsertNewPageWithHeading(DocumentBuilder builder, string captionText, string styleName)
{
    builder.InsertBreak(BreakType.PageBreak);
    string originalStyle = builder.ParagraphFormat.StyleName;
    builder.ParagraphFormat.Style = builder.Document.Styles[styleName];
    builder.Writeln(captionText);
    builder.ParagraphFormat.Style = builder.Document.Styles[originalStyle];
}

See Also

FieldToc.UseParagraphOutlineLevel