使用项目符号和编号，可以让文档的层次结构更清晰、更有条理，也更容易突出重点。在编辑文档的过程中，我个人也比较偏爱项目标号来标注文章重点信息。在之前的文章中，介绍了如何在Word中来创建项目标号和编号列表，在本篇文章中，将介绍创建PDF项目符号列表和多级编号列表的方法。
借助工具： Spire.PDF.dll
PS：dll可以直接在安装路径下的Bin文件夹中获取。
1.创建PDF符号列表
C#
using System; using System.Drawing; using Spire.Pdf; using Spire.Pdf.Graphics; using Spire.Pdf.Lists; namespace CreateList_PDF { class Program { static void Main(string[] args) { //创建一个PDF文档 PdfDocument doc = new PdfDocument(); //添加一页A4大小的页面 PdfPageBase page = doc.Pages.Add(PdfPageSize.A4); float y = 10; //创建标题并设置格式，包括字体、字号、颜色 PdfBrush brush1 = PdfBrushes.Black; PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("楷体", 18f, FontStyle.Regular), true); PdfStringFormat format1 = new PdfStringFormat(PdfTextAlignment.Center); page.Canvas.DrawString("Categories List（项目列表）", font1, brush1, page.Canvas.ClientSize.Width / 2, y, format1); y = y + font1.MeasureString("Categories List（项目列表）", format1).Height; y = y + 5; //创建列表文字并设置格式 RectangleF rctg = new RectangleF(new PointF(0, 0), page.Canvas.ClientSize); PdfLinearGradientBrush brush = new PdfLinearGradientBrush(rctg, Color.SteelBlue, Color.Blue, PdfLinearGradientMode.Vertical); PdfTrueTypeFont font2 = new PdfTrueTypeFont(new Font("宋体", 15f, FontStyle.Regular), true); String formatted = "Part 1 Listening（听力部分） \n Part 2 Speaking（口语部分） \n Part 3 Reading（阅读部分） \n Part 4 Writing（写作部分）" + "\n Part 5 Test（测试） 1 \n Part 6 Test（测试） 2 \n Part 7 Test Answers（测试答案）"; //创建PdfList 类对象，并设置列表及样式 PdfList list = new PdfList(formatted); list.Font = font2; list.Indent = 8; list.TextIndent = 5; list.Brush = brush; PdfLayoutResult result = list.Draw(page, 0, y); y = result.Bounds.Bottom; //保存并打开文档 doc.SaveToFile("List.pdf"); System.Diagnostics.Process.Start("List.pdf"); } } }
测试结果：
VB.NET
Imports System Imports System.Drawing Imports Spire.Pdf Imports Spire.Pdf.Graphics Imports Spire.Pdf.Lists Namespace CreateList_PDF Class Program Private Shared Sub Main(ByVal args As String()) Dim doc As PdfDocument = New PdfDocument() Dim page As PdfPageBase = doc.Pages.Add(PdfPageSize.A4) Dim y As Single = 10 Dim brush1 As PdfBrush = PdfBrushes.Black Dim font1 As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("楷体", 18F, FontStyle.Regular), True) Dim format1 As PdfStringFormat = New PdfStringFormat(PdfTextAlignment.Center) page.Canvas.DrawString("Categories List（项目列表）", font1, brush1, page.Canvas.ClientSize.Width / 2, y, format1) y = y + font1.MeasureString("Categories List（项目列表）", format1).Height y = y + 5 Dim rctg As RectangleF = New RectangleF(New PointF(0, 0), page.Canvas.ClientSize) Dim brush As PdfLinearGradientBrush = New PdfLinearGradientBrush(rctg, Color.SteelBlue, Color.Blue, PdfLinearGradientMode.Vertical) Dim font2 As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("宋体", 15F, FontStyle.Regular), True) Dim formatted As String = "Part 1 Listening（听力部分） " & vbLf & " Part 2 Speaking（口语部分） " & vbLf & " Part 3 Reading（阅读部分） " & vbLf & " Part 4 Writing（写作部分）" & vbLf & " Part 5 Test（测试） 1 " & vbLf & " Part 6 Test（测试） 2 " & vbLf & " Part 7 Test Answers（测试答案）" Dim list As PdfList = New PdfList(formatted) list.Font = font2 list.Indent = 8 list.TextIndent = 5 list.Brush = brush Dim result As PdfLayoutResult = list.Draw(page, 0, y) y = result.Bounds.Bottom doc.SaveToFile("List.pdf") System.Diagnostics.Process.Start("List.pdf") End Sub End Class End Namespace
2.创建PDF多级编号列表
Spire.Pdf.dll支持多种类型的编号类型：
C#
using Spire.Pdf; using Spire.Pdf.Graphics; using Spire.Pdf.Lists; using System; using System.Drawing; namespace List2 { class Program { static void Main(string[] args) { //新建PDF文档，并添加一页A4大小的空白页面 PdfDocument doc = new PdfDocument(); PdfPageBase page = doc.Pages.Add(PdfPageSize.A4); float y = 10; //添加标题并设置文本和格式 PdfBrush brush1 = PdfBrushes.Black; PdfTrueTypeFont font1 = new PdfTrueTypeFont(new Font("宋体", 18f, FontStyle.Regular), true); PdfStringFormat format1 = new PdfStringFormat(PdfTextAlignment.Center); page.Canvas.DrawString("目录一览", font1, brush1, page.Canvas.ClientSize.Width / 2, y, format1); y = y + font1.MeasureString("目录一览", format1).Height; y = y + 5; //添加文本并设置字体 RectangleF rctg = new RectangleF(new PointF(0, 0), page.Canvas.ClientSize); PdfLinearGradientBrush brush = new PdfLinearGradientBrush(rctg, Color.DarkBlue, Color.Brown, PdfLinearGradientMode.Vertical); PdfTrueTypeFont font2 = new PdfTrueTypeFont(new Font("宋体", 15f, FontStyle.Regular), true); String formatted1 = "第一章 总 论"; String formatted2 = "第一节 经济法概述 "; String formatted3 = "第二节 经济法主体 "; String formatted4 = "第二章 公司法律制度"; //设置编号列表样式 PdfOrderedMarker marker1 = new PdfOrderedMarker(PdfNumberStyle.Numeric, new PdfFont(PdfFontFamily.Helvetica, 15f)); PdfOrderedMarker marker2 = new PdfOrderedMarker(PdfNumberStyle.LowerRoman, new PdfFont(PdfFontFamily.Helvetica, 12f)); //为第一级编号列表设置格式 PdfSortedList list1 = new PdfSortedList(font2); list1.Indent = 0; list1.TextIndent = 5; list1.Brush = brush; list1.Marker = marker1; //为第二级编号列表设置格式 PdfSortedList list2 = new PdfSortedList(font2); list2.Marker = marker2; list2.Brush = brush; list2.TextIndent = 10; //应用编号列表格式到指定文本 PdfListItem item = list1.Items.Add(formatted1); item.SubList = list2; list2.Items.Add(formatted2); list2.Items.Add(formatted3); list1.Items.Add(formatted4); //设置PDF文档布局和位置 PdfTextLayout textLayout = new PdfTextLayout(); textLayout.Break = PdfLayoutBreakType.FitPage; textLayout.Layout = PdfLayoutType.Paginate; list1.Draw(page, new PointF(0, y), textLayout); //保存文件 doc.SaveToFile("多级列表.pdf"); System.Diagnostics.Process.Start("多级列表.pdf"); } } }
测试结果：
VB.NET
Imports Spire.Pdf Imports Spire.Pdf.Graphics Imports Spire.Pdf.Lists Imports System Imports System.Drawing Namespace List2 Class Program Private Shared Sub Main(ByVal args As String()) Dim doc As PdfDocument = New PdfDocument() Dim page As PdfPageBase = doc.Pages.Add(PdfPageSize.A4) Dim y As Single = 10 Dim brush1 As PdfBrush = PdfBrushes.Black Dim font1 As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("宋体", 18F, FontStyle.Regular), True) Dim format1 As PdfStringFormat = New PdfStringFormat(PdfTextAlignment.Center) page.Canvas.DrawString("目录一览", font1, brush1, page.Canvas.ClientSize.Width / 2, y, format1) y = y + font1.MeasureString("目录一览", format1).Height y = y + 5 Dim rctg As RectangleF = New RectangleF(New PointF(0, 0), page.Canvas.ClientSize) Dim brush As PdfLinearGradientBrush = New PdfLinearGradientBrush(rctg, Color.DarkBlue, Color.Brown, PdfLinearGradientMode.Vertical) Dim font2 As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("宋体", 15F, FontStyle.Regular), True) Dim formatted1 As String = "第一章 总 论" Dim formatted2 As String = "第一节 经济法概述 " Dim formatted3 As String = "第二节 经济法主体 " Dim formatted4 As String = "第二章 公司法律制度" Dim marker1 As PdfOrderedMarker = New PdfOrderedMarker(PdfNumberStyle.Numeric, NewPdfFont(PdfFontFamily.Helvetica, 15F)) Dim marker2 As PdfOrderedMarker = New PdfOrderedMarker(PdfNumberStyle.LowerRoman, NewPdfFont(PdfFontFamily.Helvetica, 12F)) Dim list1 As PdfSortedList = New PdfSortedList(font2) list1.Indent = 0 list1.TextIndent = 5 list1.Brush = brush list1.Marker = marker1 Dim list2 As PdfSortedList = New PdfSortedList(font2) list2.Marker = marker2 list2.Brush = brush list2.TextIndent = 10 Dim item As PdfListItem = list1.Items.Add(formatted1) item.SubList = list2 list2.Items.Add(formatted2) list2.Items.Add(formatted3) list1.Items.Add(formatted4) Dim textLayout As PdfTextLayout = New PdfTextLayout() textLayout.Break = PdfLayoutBreakType.FitPage textLayout.Layout = PdfLayoutType.Paginate list1.Draw(page, New PointF(0, y), textLayout) doc.SaveToFile("多级列表.pdf") System.Diagnostics.Process.Start("多级列表.pdf") End Sub End Class End Namespace
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