Itextsharp can't extract pdf unicode content in c#

Question

I am trying to get the content of pdf file using itextsharp as you can see :

static void Main(string[] args)
{
    StringBuilder text = new StringBuilder();
    using (PdfReader reader = new PdfReader(@"D:a.pdf"))
    {
        for (int i = 1; i <= reader.NumberOfPages; i++)
        {
            text.Append(PdfTextExtractor.GetTextFromPage(reader, i));
        }
    }
    System.IO.File.WriteAllText(@"c:/a.txt",text.ToString());
    Console.ReadLine();
}

My pdf content is written in Persian ,and after running the above code to result is like this :

But this is not correct result.should i set any option in itextsharp

Answer 1

It is hard to say without an original file but in case you have characters/words incorrectly placed then you should try to use LocationTextExtractionStrategy like this:

text.Append(PdfTextExtractor.GetTextFromPage(reader, i, new LocationTextExtractionStrategy());