export byte array to PDF : The Official Microsoft ASP.NET Forums

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export byte array to PDF

Apr 13, 2010 12:01 PM|LINK

Hi All,

I am trying to export a byte array to PDF. I can't find the problem but, I am getting a blank PDF page? My code is

response.ClearContent();
response.ClearHeaders();
response.ContentType = "application/pdf";
response.AddHeader("Content-Disposition", "inline; filename=my.pdf");
 int count = 0;
do
{
      count = stream.Read(buffer, 0, buffer.Length);
      response.BinaryWrite(buffer);
      response.Flush();
} while (count!=0);


stream.Close();
response.End();
response.Close();

Plz some one help me...

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Re: export byte array to PDF

Apr 13, 2010 02:28 PM|LINK

I have no idea abt your stream object,,try the following code

<div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.ClearContent();</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.ClearHeaders();</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.ContentType = "application/pdf";</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.AddHeader("Content-Disposition", "inline; filename=my.pdf");</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"></div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> int StreamLength;</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> StreamLength = (int)stream.Length;</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Byte[] buffer = new Byte[StreamLength];</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"></div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"></div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> stream.Read(buffer, 0, StreamLength);</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.BinaryWrite(buffer);</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.Flush();</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"></div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> stream.Close();</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.End();</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> Response.Close();</div>

Response.ClearContent();

Response.ClearHeaders();

Response.ContentType = "application/pdf";

Response.AddHeader("Content-Disposition", "inline; filename=my.pdf");

int StreamLength;

StreamLength = (int)stream.Length;

Byte[] buffer = new Byte[StreamLength];

stream.Read(buffer, 0, StreamLength);

Response.BinaryWrite(buffer);

Response.Flush();

stream.Close();

Response.End();

Response.Close();

Nivash Ramachandran

Edited by rnivash on Apr 13, 2010 02:35 PM
Edited by rnivash on Apr 13, 2010 02:41 PM

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bhappy

Member

28 Points

221 Posts

Re: export byte array to PDF

Apr 14, 2010 05:22 AM|LINK

Hi,

I am getting an image in the form of byte array and i need to export that image into PDF.

byte[] buffer = null;
MemoryStream stream = new MemoryStream();
buffer = ToByteArray(Request.Form["data"]);
Response.ClearContent();
        Response.ClearHeaders();
        Response.ContentType = "application/pdf";
        Response.AddHeader("Content-Disposition", "inline; filename=my.pdf");
        int count = 0;
        do
        {
            count = stream.Read(buffer, 0, buffer.Length);
            Response.BinaryWrite(buffer);
            Response.Flush();
        } while (count!=0);
       stream.Close();
        Response.End();
        Response.Close();

The above code is not working!!!. I am getting a blank screen?

Plz help me...

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AffineMesh94...

Member

6 Points

3 Posts

Re: export byte array to PDF

Apr 16, 2010 07:08 AM|LINK

You might need to specify 'content-length' in the header.

Note that server-side debugging can sometimes insert extra data into the content stream. While this would not cause a problem for HTML, it can corrupt a PDF.

HTTP compression can also compressed the content stream in ways that web browsers understand, but might cause problems for Acrobat.

To diagnose corruption you could try changing the 'content-disposition' to 'attachment', then download the file to see if it will open in Acrobat.

Here is some example code I use for ABCpdf - perhaps you could adapt it to suit your purpose?

<% @Page Language="C#" %>
<% @Import Namespace="WebSupergoo.ABCpdf7" %>
<%
Doc theDoc = new Doc();
theDoc.FontSize = 96;
theDoc.AddText("Hello World");
byte[] theData = theDoc.GetData();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "inline; filename=MyPDF.PDF");
Response.AddHeader("content-length", theData.Length.ToString());
Response.BinaryWrite(theData);
Response.End();
%>

Edited by AffineMesh94464 on Apr 16, 2010 07:10 AM

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bhappy

Member

28 Points

221 Posts

Re: export byte array to PDF

Apr 16, 2010 12:54 PM|LINK

Hi,

I tried your code by specifying content-length but, I got the error 'File does not begin with %PDF-'.

Please help me.

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rnivash

Member

312 Points

62 Posts

Re: export byte array to PDF

Apr 16, 2010 03:40 PM|LINK

Hi,

Can you tell me more details about the form element "data". because you used Request.Form["data"]

and

if the buffer is a byte array of your image then what are you trying to do with stream.Read() . you can pass the buffer to Response.BinaryWrite straightly..right?.

Regards,

Nivash R

Nivash Ramachandran

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DuoDimension

Member

32 Points

35 Posts

Re: export byte array to PDF

Apr 19, 2010 03:10 AM|LINK

Try to google PDF creator. I think it will be more easier way to put image into the pdf file.

Edited by DuoDimension on Apr 19, 2010 03:21 AM

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DuoDimension

Member

32 Points

35 Posts

Re: export byte array to PDF

Apr 19, 2010 03:14 AM|LINK

After presaving data you can use PDF Duo .NET converter/creator .NET component. It converts HTML to PDF. It up to you how you want to represent the PDF file. You can save the PDF on the disk or convert HTML to PDF and show PDF in the browser window with saving.

So you can use image tag with your picture as a parameter.

// create an instance of converter object
DuoDimension.HtmlToPdf conv = new DuoDimension.HtmlToPdf();
string sHtml = "<img src='yourimage.jpg' width=500 height=300 />";
conv.ImageInfo.ImageScale = 0.8f;


// open the html string and convert it into the pdf
conv.OpenHTML(sHtml );
// that string saves pdf on the disk
// conv.SavePDF("testfifle.pdf");


// show pdf without saving on the disd
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "inline; filename=testfifle.pdf");
Response.BinaryWrite(conv.SavePdf());
Response.Flush();
Response.End();
Response.Close();

Home page of the component: http://www.duodimension.com/html_pdf_asp.net/component_html_pdf.aspx

Edited by Song-Tian - MSFT on Apr 19, 2010 03:24 AM
Edited by bhappy on Apr 19, 2010 09:04 AM

Reply

bhappy

Member

28 Points

221 Posts

Re: export byte array to PDF

Apr 19, 2010 09:03 AM|LINK

Hi,

Actualy I have generated a report in Flex. On click of Export to PDF button, I am taking snapshot of the report in Flex and converting it into ByteArray. I am sending the resulting ByteArray to my .net application. In my .net application I am getting the results as Request.Form["data"] as bytearray. Later I am trying to display this bytearray in PDF.

Plz help me...

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bhappy

export byte array to PDF

rnivash

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bhappy

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AffineMesh94...

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bhappy

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rnivash

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DuoDimension

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DuoDimension

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bhappy

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