如何将ASP.NET MVC上的搜索结果打印成pdf？

// 引入iTextSharp命名空间
using iTextSharp.text;
using iTextSharp.text.pdf;

public ActionResult PrintPdf()
{
    // 获取搜索结果数据
    var searchResults = GetSearchResults();

    // 创建PDF文档
    Document document = new Document();
    MemoryStream ms = new MemoryStream();
    PdfWriter writer = PdfWriter.GetInstance(document, ms);
    
    // 打开文档
    document.Open();

    // 创建字体样式
    Font titleFont = FontFactory.GetFont(FontFactory.HELVETICA_BOLD, 18);
    Font contentFont = FontFactory.GetFont(FontFactory.HELVETICA, 12);

    // 添加标题
    Paragraph title = new Paragraph("Search Results", titleFont);
    document.Add(title);

    // 添加搜索结果内容
    foreach (var result in searchResults)
    {
        Paragraph content = new Paragraph(result, contentFont);
        document.Add(content);
    }

    // 关闭文档
    document.Close();

    // 设置响应内容类型
    Response.ContentType = "application/pdf";
    // 设置响应头，将文件名设为"search_results.pdf"
    Response.AddHeader("content-disposition", "attachment;filename=search_results.pdf");
    // 将PDF文件发送给用户进行下载
    Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
    Response.OutputStream.Flush();
    Response.OutputStream.Close();

    return null;
}