使用C#删除PDF文档中的空页

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

string filePath = "path/to/pdf/document.pdf";
PdfReader reader = new PdfReader(filePath);

int pageCount = reader.NumberOfPages;
for (int i = pageCount; i >= 1; i--)
{
    // 获取当前页的内容
    string pageContent = PdfTextExtractor.GetTextFromPage(reader, i);

    // 检查当前页是否为空页
    if (string.IsNullOrWhiteSpace(pageContent))
    {
        // 删除空页
        reader.RemovePage(i);
    }
}

string outputFilePath = "path/to/output/document.pdf";
using (FileStream fs = new FileStream(outputFilePath, FileMode.Create))
{
    using (Document document = new Document())
    {
        using (PdfCopy copy = new PdfCopy(document, fs))
        {
            document.Open();
            for (int i = 1; i <= reader.NumberOfPages; i++)
            {
                PdfImportedPage page = copy.GetImportedPage(reader, i);
                copy.AddPage(page);
            }
            document.Close();
        }
    }
}