PDF not opening as part of iTextSharp API : The Official Microsoft ASP.NET Forums

Reply

PDF not opening as part of iTextSharp API

Mar 25, 2012 01:15 AM|LINK

Hi,

I am using the following code on button click to return the current web page as a pdf:

<%@ Control Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Web.UI" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Text.RegularExpressions" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="iTextSharp.text" %>
<%@ Import Namespace="iTextSharp.text.pdf" %>
<%@ Import Namespace="iTextSharp.text.html" %>
<%@ Import Namespace="iTextSharp.text.html.simpleparser" %>
<%@ Import Namespace="iTextSharp.text.xml" %>

<script runat="server">

    private void buttonPDF_Click(object sender, System.EventArgs e)
    {
        string currentURL = Request.Url.ToString();
        
        //Set content type to PDF
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-disposition", "attachment;filename=" + currentURL + ".pdf");
        
        //Create new objects
        Document pdfDocument = new Document();
        StringWriter strWriter = new StringWriter();
        
        //Create HTML Text Writer allowing us to write HTML
        HtmlTextWriter htmlTextWriter = new HtmlTextWriter(strWriter);

        //Create a writer that listens to the document
        PdfWriter.GetInstance(pdfDocument, Response.OutputStream);
        pdfDocument.Open();

        //Create String Reader to read parts of strings
        StringReader strReader = new StringReader(strWriter.ToString());

        //Create HTML Worker for parsing simple HTML
        HTMLWorker htmlWorker = new HTMLWorker(pdfDocument);
        htmlWorker.Parse(strReader);
        
        //Stop processing script and return current result
        Response.End();
    }
</script>

<asp:Button runat="server" ID="buttonPDF" OnClick="buttonPDF_Click" CssClass="button" Text="PDF"></asp:Button>

The pdf is being created successfully but Adobe Acrobat reader says it cannot open the file? I think the file is corrupt and not correct?

Can anybody please help?

Thanks,

Moved by mbanavige on Mar 25, 2012 01:17 PM

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 03:06 AM|LINK

I think I am missing adding to the pdfDocument file? Any help would be much appreciated...

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 03:16 AM|LINK

You are not writing anything in stream that why this error is happening,

StringWriter strWriter = new StringWriter();

strWriter.Write("I am Foobar");

Let me know if it works

Please 'Mark as Answer' if my post helped you

Thanks and Regards,
Paritosh

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 03:21 AM|LINK

Once a file open it should be closed.

try

pdfDocument.Close();

if(Hard_Work && Luck)
Response.Write("Success");

Best Of Luck
Shival Thakur

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 03:32 AM|LINK

I tried adding strWriter.Write("I am a Foobar");

But that still give me the same error when trying to open the document...

When i open in Notepad++ I can only see:

%PDF-1.4
%âãÏÓ

Any ideas?

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 03:33 AM|LINK

Also when I add a pdfDocument.Close() when I click on the button click, I get a webpage not found message?

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 11:02 AM|LINK

I have nearly got this working, I ghav changed to code to the below:

<%@ Control Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Web.UI" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Text.RegularExpressions" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="iTextSharp.text" %>
<%@ Import Namespace="iTextSharp.text.pdf" %>
<%@ Import Namespace="iTextSharp.text.html" %>
<%@ Import Namespace="iTextSharp.text.html.simpleparser" %>
<%@ Import Namespace="iTextSharp.text.xml" %>
<%@ Import Namespace="log4net" %>

<script runat="server">

    // Setup logging
    private static readonly ILog Log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
    
    private void buttonPDF_Click(object sender, System.EventArgs e)
    {
        //Get page URL
        string currentURL = Request.Url.ToString();

        //Create new objects
        MemoryStream MStream = new MemoryStream();
        Document document = new Document();
        
        //Attempt to create writer that listens to the document
        try
        {
            PdfWriter writer = PdfWriter.GetInstance(document, MStream);
            document.Open();
            document.Add(new iTextSharp.text.Paragraph("This is a test and must work"));
            document.Close();
        }
        
        //If unsuccessful throw an exception
        catch
        {
            Log.Debug("There has been an error creating a PDF");
        }

        //Set content type to PDF and create filename
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.ClearContent();
        HttpContext.Current.Response.ClearHeaders();
        HttpContext.Current.Response.ContentType = "application/pdf";
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + currentURL + ".pdf");
        HttpContext.Current.Response.BinaryWrite(MStream.GetBuffer());
        HttpContext.Current.Response.End();
    }

</script>

<asp:Button runat="server" ID="buttonPDF" OnClick="buttonPDF_Click" CssClass="button" Text="PDF"></asp:Button>

When I click the button a PDF is created and the text appears "This is a test and must work"

Now all I need to do is instead of writing out that text, I need to return the current web page as a PDF. So this line:

document.Add(new iTextSharp.text.Paragraph("This is a test and must work"));

I need to render out the page, how can I do this?

Is this possible?

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 12:52 PM|LINK

paritoshmmec

You are not writing anything in stream that why this error is happening,

StringWriter strWriter = new StringWriter();

strWriter.Write("I am Foobar");

Let me know if it works

Any ideas on my updated code? I just need to somehow export the web page and add it to the document?

If I add this:

//Attempt to create writer that listens to the document
        try
        {
            strWriter.Write("Hello");
            
            PdfWriter writer = PdfWriter.GetInstance(document, MStream);
            document.Open();
            document.Add(new iTextSharp.text.Paragraph(strWriter.ToString()));
            document.Close();
        }

The PDF opens and shows "Hello", so I just need to change this for the webpage content somehow...

How can I do this?

Edited by billy_111 on Mar 25, 2012 12:55 PM

Reply

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 01:56 PM|LINK

wrap your html content around a div or panel which can give you an inner html(if you have already then don't put it)Something like this:-

//html control

</div>

StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
dvHtml.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());

Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();

then rest you know

Please let me know in case of any concerns.

Please 'Mark as Answer' if my post helped you

Thanks and Regards,
Paritosh

Reply

billy_111

Member

333 Points

878 Posts

Re: PDF not opening as part of iTextSharp API

Mar 25, 2012 02:35 PM|LINK

Hi,

The problem is that I am using this as a control. So I have one control where I reference this control like so...

~\controls\controlA.ascx

<!-- User control for PDF generator -->
        <form runat="server" id="pdfFormTag" action="index.aspx" method="post">
            <rcuk:pdfgenerator ID="pdfgenerator" runat="server"/>
        </form>

Then in ~\controls\pdfgenerator.ascx

<%@ Control Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Web.UI" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="System.Linq" %>
<%@ Import Namespace="System.Text.RegularExpressions" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="iTextSharp.text" %>
<%@ Import Namespace="iTextSharp.text.pdf" %>
<%@ Import Namespace="iTextSharp.text.html" %>
<%@ Import Namespace="iTextSharp.text.html.simpleparser" %>
<%@ Import Namespace="log4net" %>

<script runat="server">

    // Setup logging
    private static readonly ILog Log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); 
    
    private void buttonPDF_Click(object sender, System.EventArgs e)
    {               
        //Get page URL
        string currentURL = Request.Url.ToString();

        //Create new objects
        MemoryStream MStream = new MemoryStream();
        Document document = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
        StringWriter strWriter = new StringWriter();

        //Create HTML Text Writer allowing us to write HTML
        HtmlTextWriter htmlTextWriter = new HtmlTextWriter(strWriter);
        
        //Render page here??

        StringReader sr = new StringReader(strWriter.ToString());
        
        //Attempt to create writer that listens to the document
        try
        {
            HTMLWorker htmlparser = new HTMLWorker(document);
            PdfWriter.GetInstance(document, Response.OutputStream);
            document.Open();
            htmlparser.Parse(sr);
            document.Close();
        }
        
        //If unsuccessful throw an exception
        catch
        {
            Log.Debug("There has been an error creating a PDF");
        }

        //Clear headers, set content type to PDF and create filename
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.ClearContent();
        HttpContext.Current.Response.ClearHeaders();
        HttpContext.Current.Response.ContentType = "application/pdf";
        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + currentURL + ".pdf");
        HttpContext.Current.Response.BinaryWrite(MStream.GetBuffer());
        HttpContext.Current.Response.End();
    }

</script>

<asp:Button runat="server" ID="buttonPDF" OnClick="buttonPDF_Click" CssClass="button" Text="PDF"></asp:Button>

So I don't think dvHtml.RenderControl(hw); will work?

Any ideas how I can do this?

Thanks

PDF not opening as part of iTextSharp API RSS

13 replies

billy_111

PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

paritoshmmec

Re: PDF not opening as part of iTextSharp API

shivalthakur

Re: PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

paritoshmmec

paritoshmmec

Re: PDF not opening as part of iTextSharp API

billy_111

Re: PDF not opening as part of iTextSharp API

This site is managed for Microsoft by Neudesic, LLC. | © 2013 Microsoft. All rights reserved.

Follow Us On:

Microsoft