PM> Install-Package Spire.PDF

using Spire.Pdf;
using Spire.Pdf.Graphics;
using System;
using System.Drawing;
using System.IO;

namespace CreatePdfDocument
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建PdfDocument对象
            PdfDocument doc = new PdfDocument();

            //添加页面
            PdfPageBase page = doc.Pages.Add(PdfPageSize.A4, new PdfMargins(35f));

            //指定标题文本
            String titleText = "什么是AI？";

            //创建实体笔刷
            PdfSolidBrush titleBrush = new PdfSolidBrush(new PdfRGBColor(Color.Blue));
            PdfSolidBrush paraBrush = new PdfSolidBrush(new PdfRGBColor(Color.Black));

            //创建true type字体
            PdfTrueTypeFont titleFont = new PdfTrueTypeFont(new Font("宋体", 18f, FontStyle.Bold), true);
            PdfTrueTypeFont paraFont = new PdfTrueTypeFont(new Font("宋体", 12f, FontStyle.Regular), true);

            //通过PdfStringFormat类设置文本对齐方式
            PdfStringFormat format = new PdfStringFormat();
            format.Alignment = PdfTextAlignment.Center;

            //在页面中心绘制标题
            page.Canvas.DrawString(titleText, titleFont, titleBrush, page.Canvas.ClientSize.Width / 2, 20, format);

            //从.txt文件中获取段落内容
            string paraText = File.ReadAllText("C:\\Users\\Administrator\\Desktop\\文本.txt");

            //创建一个PdfTextWidget对象来保存段落内容
            PdfTextWidget widget = new PdfTextWidget(paraText, paraFont, paraBrush);

            //创建一个放置段落内容的矩形
            RectangleF rect = new RectangleF(0, 50, page.Canvas.ClientSize.Width, page.Canvas.ClientSize.Height);

            //将PdfLayoutType设置为Paginate以使内容自动分页
            PdfTextLayout layout = new PdfTextLayout();
            layout.Layout = PdfLayoutType.Paginate;

            //在页面上绘制小部件
            widget.Draw(page, rect, layout);

            //保存文件
            doc.SaveToFile("创建PDF文档.pdf");
            doc.Dispose();
        }
    }
}

Imports Spire.Pdf
Imports Spire.Pdf.Graphics
Imports System.Drawing
Imports System.IO

Namespace CreatePdfDocument
    Friend Class Program
        Private Shared Sub Main(ByVal args As String())
            '创建PdfDocument对象
            Dim doc As PdfDocument = New PdfDocument()

            '添加页面
            Dim page As PdfPageBase = doc.Pages.Add(PdfPageSize.A4, New PdfMargins(35F))

            '指定标题文本
            Dim titleText = "什么是AI？"

            '创建实体笔刷
            Dim titleBrush As PdfSolidBrush = New PdfSolidBrush(New PdfRGBColor(Color.Blue))
            Dim paraBrush As PdfSolidBrush = New PdfSolidBrush(New PdfRGBColor(Color.Black))

            '创建true type字体
            Dim titleFont As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("宋体", 18F, FontStyle.Bold), True)
            Dim paraFont As PdfTrueTypeFont = New PdfTrueTypeFont(New Font("宋体", 12F, FontStyle.Regular), True)

            '通过PdfStringFormat类设置文本对齐方式
            Dim format As PdfStringFormat = New PdfStringFormat()
            format.Alignment = PdfTextAlignment.Center

            '在页面中心绘制标题
            page.Canvas.DrawString(titleText, titleFont, titleBrush, page.Canvas.ClientSize.Width / 2, 20, format)

            '从.txt文件中获取段落内容
            Dim paraText = File.ReadAllText("C:\Users\Administrator\Desktop\文本.txt")

            '创建一个PdfTextWidget对象来保存段落内容
            Dim widget As PdfTextWidget = New PdfTextWidget(paraText, paraFont, paraBrush)

            '创建一个放置段落内容的矩形
            Dim rect As RectangleF = New RectangleF(0, 50, page.Canvas.ClientSize.Width, page.Canvas.ClientSize.Height)

            '将PdfLayoutType设置为Paginate以使内容自动分页
            Dim layout As PdfTextLayout = New PdfTextLayout()
            layout.Layout = PdfLayoutType.Paginate

            '在页面上绘制小部件
            widget.Draw(page, rect, layout)

            '保存文件
            doc.SaveToFile("创建PDF文档.pdf")
            doc.Dispose()
        End Sub
    End Class
End Namespace