cannot redirect after http headers have been sent

Question

1.00/5 (1 vote)

See more:

Hello

I am getting this error Message "cannot redirect after http headers have been sent"
when I am calling response.redirect ("home.aspx").

this error occured after downloading file from gridview which is infragistic control.following code to downloading file..

so how can i redirect to the page. ~~Its urgent~~..

C#

string fileName=this.Controller.Model.SessionDataContext.FileAttachmentRowData.PhysicalFileName;
            byte[] array = this.Controller.Model.SessionDataContext.FileAttachmentRowData.FileContents;
            Response.Clear();
            Response.Buffer = true;
            Response.AddHeader("Content-disposition", "attachment; filename=" + fileName);
            Response.AddHeader("Content-Length", array.Length.ToString());
            Response.ContentType = "application/pdf";
            Response.OutputStream.Write(array, 0, array.Length);
            Response.Flush();
            Response.Clear();

Posted 17-Apr-12 0:28am

Ajay ghosalkar

Updated 27-Feb-20 19:46pm

phil.o

v4

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Deepak_Sharma_ · Answer 1 · 2012-04-17T00:38:00

Solution 1

Hi,

You may have used Response.Redirect twice continuously which causes this error.
Refer to :
http://stackoverflow.com/questions/5646762/i-am-getting-exception-cannot-redirect-after-http-headers-have-been-sent-when[^]

Posted 17-Apr-12 0:38am

Deepak_Sharma_

Comments

Ajay ghosalkar 17-Apr-12 10:07am

if removed response.flush then page will be redirected but i am not able to download file..page has to be redirected after downloading file. so what to do that..pls give me right solution

jjackie1 18-Sep-13 7:07am

Have you got the answer for this probelm?? if so can you explain it here.

kapil7852 · Answer 2 · 2021-05-13T19:38:00

Solution 3

Hi, Just try the following code. Sometimes the request execute twise at same time with different header. Bellow code prevent the error and take first request.
if (!Response.IsRequestBeingRedirected)
{
Response.Redirect("http://www.yoururl.com");
}
Hope this will help other also

Posted 13-May-21 19:38pm

kapil7852

Updated 13-May-21 19:48pm

Comments

OriginalGriff 14-May-21 1:49am

While I applaud your urge to help people, it's a good idea to stick to new questions, rather than 9 year old ones. After that amount of time, it's unlikely that the original poster is at all interested in the problem any more! (Particularly when he originally considered it "urgent"...)
Answering old questions can be seen as rep-point hunting, which is a form of site abuse. The more trigger happy amongst us will start the process of banning you from the site if you aren't careful. Stick to new questions and you'll be fine.