c#从PDF读取行

using System;
using TencentCloud.Common;
using TencentCloud.Common.Profile;
using TencentCloud.Pdf.V20201123;
using TencentCloud.Pdf.V20201123.Models;

public class PdfDemo
{
    public static void Main(string[] args)
    {
        try
        {
            // 必要参数
            string secretId = "YOUR_SECRET_ID";
            string secretKey = "YOUR_SECRET_KEY";
            string bucketName = "YOUR_BUCKET_NAME";
            string pdfFile = "YOUR_PDF_FILE_PATH";

            // 初始化
            Credential cred = new Credential { SecretId = secretId, SecretKey = secretKey };
            ClientProfile clientProfile = new ClientProfile();
            HttpProfile httpProfile = new HttpProfile();
            httpProfile.Endpoint = "pdf.tencentcloudapi.com";
            clientProfile.HttpProfile = httpProfile;

            // 实例化客户端
            PdfClient client = new PdfClient(cred, "ap-guangzhou", clientProfile);

            // 调用接口
            ExtractPdfTextRequest req = new ExtractPdfTextRequest();
            req.SrcType = "URL";
            req.SrcUrl = "https://" + bucketName + ".cos." + "ap-guangzhou" + ".myqcloud.com/" + pdfFile;
            ExtractPdfTextResponse resp = client.ExtractPdfText(req);

            // 输出结果
            Console.WriteLine("PDF文件内容：");
            foreach (var line in resp.Text)
            {
                Console.WriteLine(line);
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("错误：" + e.Message);
        }
    }
}