每行阅读PDF

如何使用iText5 for .NET读取PDF文件line by line ?我在网上搜索过，但我只发现阅读PDF文件每页内容。

请参见下面的代码。

public string ReadPdfFile(object Filename)
{
    string strText = string.Empty;
    try
    {
        PdfReader reader = new PdfReader((string)Filename);
        for (int page = 1; page <= reader.NumberOfPages; page++)
        {
            ITextExtractionStrategy its = new iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy();
            String s = PdfTextExtractor.GetTextFromPage(reader, page, its);
            s = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(s)));
            strText = strText + s;
        }
        reader.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
    return strText;
}