C#/VB.NET 创建PDF项目符号列表和多级编号列表

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：Free Spire.PDF for .NET
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

Csharp

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

Csharp

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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