object reference error while implement itextsharp

Question

i am a beginner to implement itextsharp, as i try this static code but getting error 'Object reference not set to an instance'.

Aravind Govindaraj · Answer

I assume, there may be some issue in the stream object. could you kindly check this link which may helps you to implement html to pdf https://stackoverflow.com/questions/25164257/how-to-convert-html-to-pdf-using-itextsharp

Garima Bansal · Answer

protected void Unnamed1_Click(object sender, EventArgs e) { string HTMLContent = " S.No. Name 1 ABC "; Response.Clear(); Response.ContentType = "application/pdf"; Response.AddHeader("content-disposition", "attachment;filename=" + "Project Report.pdf"); Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.BinaryWrite(GetPDF(HTMLContent)); Response.End(); } public byte[] GetPDF(string pHTML) { byte[] bPDF; MemoryStream ms = new MemoryStream(); TextReader txtReader = new StringReader(pHTML); // 1: create object of a itextsharp document class Document doc = new Document(PageSize.A4, 25, 25, 25, 25); // 2: we create a itextsharp pdfwriter that listens to the document and directs a XML-stream to a file PdfWriter PdfWriterr = PdfWriter.GetInstance(doc, ms); // 3: we create a worker parse the document HTMLWorker htmlWorker = new HTMLWorker(doc); // 4: we open document and start the worker on the document doc.Open(); htmlWorker.StartDocument(); // 5: parse the html into the document htmlWorker.Parse(txtReader); // 6: close the document and the worker htmlWorker.EndDocument(); htmlWorker.Close(); doc.Close(); bPDF = ms.ToArray(); return bPDF; }

Garima Bansal · Answer

System.NullReferenceException' in itextsharp.dll Object reference not set to an instance of an object. but i have already add itextsharp.dll reference,still getting error PdfWriter PdfWriterr = PdfWriter.GetInstance(doc, ms); in this line

Garima Bansal · Answer

Aravind Govindaraj PdfWriter.GetInstance(doc, Response.OutputStream); // in lthis line getting error

Aravind Govindaraj · Answer

may i know which line you are getting this error ?

Patricia Hernandez · Answer

I think saw an article in W3schools explaining that but I am not sure where.

object reference error while implement itextsharp

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Answers (6)