PM> Install-Package Spire.Presentation

using Spire.Presentation;
using System.IO;
using System.Text;
namespace ExtractText
{
    class Program
    {
        static void Main(string[] args)
        {
            //初始化 Presentation 類的實(shí)例
            Presentation presentation = new Presentation();
 
            //加載示例 PowerPoint 文檔
            presentation.LoadFromFile("Island.pptx");
            //加載示例 PowerPoint 文檔
            StringBuilder sb = new StringBuilder();
 
            //遍歷文檔中的每一張幻燈片
            foreach (ISlide slide in presentation.Slides)
            {
                //遍歷每張幻燈片中的每個(gè)形狀
                foreach (IShape shape in slide.Shapes)
                {
                    //判斷形狀是否屬于 IAutoShape 類型
                    if (shape is IAutoShape)
                    {
                        //遍歷每個(gè)形狀中的所有段落
                        foreach (TextParagraph tp in (shape as IAutoShape).TextFrame.Paragraphs)
                        {
                            //提取文本并保存到 StringBuilder 實(shí)例中
                            sb.AppendLine(tp.Text);
                        }
                    }
                }
            }
            //創(chuàng)建一個(gè)新的 txt 文件來保存提取的文本
            File.WriteAllText("ExtractText.txt", sb.ToString());
        }
    }
}