在 PDF 中使用标题

在标题中应用编号样式

标题是任何文档的重要部分。作者总是试图使标题对读者更加突出和有意义。如果文档中有多个标题，作者有几种选择来组织这些标题。组织标题的最常见方法之一是以编号样式书写标题。

Aspose.PDF for .NET 提供许多预定义的编号样式。这些预定义的编号样式存储在一个枚举中，NumberingStyle。NumberingStyle 枚举的预定义值及其描述如下：

标题类型	描述
NumeralsArabic	阿拉伯类型，例如，1,1.1,…
NumeralsRomanUppercase	罗马大写类型，例如，I,I.II,…
NumeralsRomanLowercase	罗马小写类型，例如，i,i.ii,…
LettersUppercase	英语大写类型，例如，A,A.B,…
LettersLowercase	英语小写类型，例如，a,a.b,…
Aspose.Pdf.Heading 类的 Style 属性用于设置标题的编号样式。

图：预定义编号样式
获取上图所示输出的源代码如下所示。

下一个代码片段也与 Aspose.Drawing 库一起使用。

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void ApplyNumberStyleToPdf()
{
    // The path to the documents directory
    var dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

    // Create PDF document
    using (var document = new Aspose.Pdf.Document())
    {
        document.PageInfo.Width = 612.0;
        document.PageInfo.Height = 792.0;
        document.PageInfo.Margin = new Aspose.Pdf.MarginInfo();
        document.PageInfo.Margin.Left = 72;
        document.PageInfo.Margin.Right = 72;
        document.PageInfo.Margin.Top = 72;
        document.PageInfo.Margin.Bottom = 72;

        // Add page
        var pdfPage = document.Pages.Add();
        pdfPage.PageInfo.Width = 612.0;
        pdfPage.PageInfo.Height = 792.0;
        pdfPage.PageInfo.Margin = new Aspose.Pdf.MarginInfo();
        pdfPage.PageInfo.Margin.Left = 72;
        pdfPage.PageInfo.Margin.Right = 72;
        pdfPage.PageInfo.Margin.Top = 72;
        pdfPage.PageInfo.Margin.Bottom = 72;

        // Create a floating box with the same margin as the page
        var floatBox = new Aspose.Pdf.FloatingBox();
        floatBox.Margin = pdfPage.PageInfo.Margin;

        // Add the floating box to the page
        pdfPage.Paragraphs.Add(floatBox);

        // Add headings with numbering styles
        var heading = new Aspose.Pdf.Heading(1);
        heading.IsInList = true;
        heading.StartNumber = 1;
        heading.Text = "List 1";
        heading.Style = Aspose.Pdf.NumberingStyle.NumeralsRomanLowercase;
        heading.IsAutoSequence = true;
        floatBox.Paragraphs.Add(heading);

        var heading2 = new Aspose.Pdf.Heading(1);
        heading2.IsInList = true;
        heading2.StartNumber = 13;
        heading2.Text = "List 2";
        heading2.Style = Aspose.Pdf.NumberingStyle.NumeralsRomanLowercase;
        heading2.IsAutoSequence = true;
        floatBox.Paragraphs.Add(heading2);

        var heading3 = new Aspose.Pdf.Heading(2);
        heading3.IsInList = true;
        heading3.StartNumber = 1;
        heading3.Text = "the value, as of the effective date of the plan, of property to be distributed under the plan on account of each allowed";
        heading3.Style = Aspose.Pdf.NumberingStyle.LettersLowercase;
        heading3.IsAutoSequence = true;
        floatBox.Paragraphs.Add(heading3);

        // Save PDF document
        document.Save(dataDir + "ApplyNumberStyle_out.pdf");
    }
}