CODEWITHSUNDEEP
c#pdfitextpdf-generation
tumsd923
tumsd923

Reputation: 28

C#, iTextSharp 5.5.10 Shown "Cannot access a closed file." on document close command

I don't know how to solve this because the document seem close before the actual command even I put command to open it again. Please help.

This is my code. When I click the button it will do this and the error will occur at doc.close() line. It shown "Cannot access a closed file." Even I put doc.open() above.

private void run_Click(object sender, EventArgs e)
    {
        Document doc = new Document(PageSize.A4);

        using(FileStream op = new FileStream("text.pdf", FileMode.Create))
        {
            PdfWriter wri = PdfWriter.GetInstance(doc, op);
            Paragraph p = new Paragraph("test");
            doc.Open();
            doc.Add(p);
        }

        using (FileStream op = new FileStream("text.pdf", FileMode.Append, FileAccess.Write))
        {

            PdfWriter wri = PdfWriter.GetInstance(doc, op);
            Paragraph p = new Paragraph("test2");
            doc.Open();
            doc.Add(p);
            doc.Close();
        }

    }

Upvotes: 0

Views: 1531

Answers (1)

Han Zhao
Han Zhao

Reputation: 2062

First of all, it is not a correct way to add some contents to an existing PDF by appending a PDF file. If you want to add contents to an existing PDF, please check ITextSharp insert text to an existing pdf.

However, if you just want it to work, you just need to create a new Document instance every time.

private void run_Click(object sender, EventArgs e)
{
    Document doc = new Document(PageSize.A4);

    using(FileStream op = new FileStream("text.pdf", FileMode.Create))
    {
        PdfWriter wri = PdfWriter.GetInstance(doc, op);
        Paragraph p = new Paragraph("test");
        doc.Open();
        doc.Add(p);
    }

    using (FileStream op = new FileStream("text.pdf", FileMode.Append, FileAccess.Write))
    {
        doc = new Document(PageSize.A4); // this is the fix
        PdfWriter wri = PdfWriter.GetInstance(doc, op);
        Paragraph p = new Paragraph("test2");
        doc.Open();
        doc.Add(p);
        doc.Close();
    }
}

Upvotes: 1

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