如何使用C#处理ASP.NET核心Web API中传入的pdf？

[HttpPost]
public IActionResult ProcessPdf([FromForm] IFormFile file)
{
    // 处理PDF文件的代码
    return Ok();
}

using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;

public IActionResult ProcessPdf([FromForm] IFormFile file)
{
    using (var reader = new PdfReader(file.OpenReadStream()))
    {
        var text = new StringBuilder();

        for (int i = 1; i <= reader.NumberOfPages; i++)
        {
            var strategy = new SimpleTextExtractionStrategy();
            var currentText = PdfTextExtractor.GetTextFromPage(reader, i, strategy);
            text.Append(currentText);
        }

        // 对提取到的文本进行处理或其他操作
        var processedText = ProcessText(text.ToString());

        return Ok(processedText);
    }
}