Solved

Download file from Database generating PageRequestManagerParserErrorException

Posted on 2012-12-24
1
557 Views
Last Modified: 2012-12-24
I am trying to download a file from my database to my webform. The file downloads fine, but when I click a link on the page to go to another page, I'm getting this error:

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.

I've tried two different methods of displaying the file.

1) Using a .ashx IHttpHandler with:
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest

      Dim id As Integer = CInt(context.Request.QueryString("ID"))
      context.Response.Clear()
      context.Response.ClearContent()
      context.Response.ClearHeaders()

<snip code to retrieve from dbf>

         context.Response.ContentType = contentType
         context.Response.AddHeader("Content-Disposition", "attachment; filename=" + UploadedFileName)
         context.Response.BinaryWrite(data)
         context.Response.Flush()
         context.Response.[End]()

Open in new window


And 2)
With a webform page and this in code behind (snipped):

   Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

      ' Get the file id from the query string
      Dim id As Integer = Convert.ToInt16(Request.QueryString("ID"))

<snip code to retrieve from dbf>

         ' Send the file to the browser
         Response.AddHeader("Content-type", contentType)
         Response.AddHeader("Content-Disposition", "attachment; filename=" + UploadedFileName)
         Response.BinaryWrite(data)
         Response.Flush()
         Response.[End]()

Open in new window


Again, it is downloading the file perfectly. It's just when I attempt to click my grid to load another record, it errors as above.

Any ideas?

thanks!
0
Comment
Question by:Starr Duskk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 2

Accepted Solution

by:
Starr Duskk earned 0 total points
ID: 38719516
I was using a LinkButton in my grid and the postback generated the error.

I changed it to a simply label a href / hyperlink and it works fine now.

thanks!
0

Featured Post

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question