How do I refresh the page in ASP.NET? (Let it reload itself by code)

Question

How do I refresh a page in ASP.NET? (Let it reload itself by code)

I'd rather not use Response.Redirect() because I don't know if the page I will be on, as it's inside a user control inside a webpart inside sharepoint.

I'm not OP, but one reason may be because javascript can be disabled — Nathan Koop, Jul 30 '09 at 13:21
ASP.NET relies on javascript, so if a user has javascript disabled there's a bigger problem ... — jrummell, Jul 30 '09 at 13:25

score 419 · Answer 1 · edited Jul 14 '17 at 00:55

419

In my user controls, after updating data I do:

  Response.Redirect(Request.RawUrl);

That ensures that the page is reloaded, and it works fine from a user control. You use RawURL and not Request.Url.AbsoluteUri to preserve any GET parameters that may be included in the request.

You probably don't want to use: __doPostBack, since many aspx pages behave differently when doing a postback.

edited Jul 14 '17 at 00:55

Noam Hacker

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answered Jul 30 '09 at 13:28

chris

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@chris would you use a second parameter as Response.Redirect(Request.RawUrl, false)? Apparently, it is the best practice when using reponse.redirect. What do you think? – aleafonso Feb 16 '12 at 09:45
@aleafonso: I have never personally used the 2nd parameter, and never had any issues as a consequence, so I'm not sure what it buys you. But yes, according to the documentation, you should be using a 2nd parameter, but only if you're going to call CompleteRequest - which I have never bothered with. – chris Feb 16 '12 at 13:21
1

Sometimes you might need AbsoluteUri, when the current page has an Id parameter (like a questionId here on stackoverflow). Or am I wrong? – CularBytes May 05 '15 at 13:06
3

@aleafonso is right - unless you need to halt all processing on the page, which is sometimes indicative of poor design plannning, you should pass a false as the second param. Not passing the 2nd param, or passing true, throws an HttpException and can impact performance and fill up event logs. – Ripside May 23 '15 at 21:44

score 54 · Answer 2 · edited Mar 29 '16 at 18:06

54

This might be late, but I hope it helps someone who is looking for the answer.

You can use the following line to do that:

Server.TransferRequest(Request.Url.AbsolutePath, false);

Try to avoid using Response.Redirect as it increases the steps in the process. What it actually does is:

Sends back the page with redirection header
The Browser redirects to the destination URL.

As you can see, the same outcome takes 2 trips rather than 1 trip.

edited Mar 29 '16 at 18:06

Sergey

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answered Nov 02 '12 at 22:41

dicemaster

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+1 for pointing out that Server.Transfer() is a more efficient way than Response.Redirect() – Krisztián Balla Jan 10 '14 at 12:59
This worked in cases where Response.Redirect did not work correctly. – Ed Bayiates Dec 03 '15 at 18:46
I've found that this does not clear the state of pages, eg the set `.Text` in a `TextBox` or the `.Visible` status of a `Button`. – Cloud Feb 03 '20 at 02:22
Dumb question: where in the source of my ASPX page do I put that line? – David.P Nov 10 '22 at 19:09

score 47 · Accepted Answer · answered Jul 30 '09 at 13:25

47

Once the page is rendered to the client you have only two ways of forcing a refresh. One is Javascript

setTimeout("location.reload(true);", timeout);

The second is a Meta tag:

<meta http-equiv="refresh" content="600">

You can set the refresh intervals on the server side.

answered Jul 30 '09 at 13:25

Ariel Popovsky

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where should i put the setTimeout? – Siti Feb 04 '14 at 02:56
Please see the answer from @gaurav below for a good way to do this in .NET using `Server.TransferRequest`. – sfarbota Jun 02 '15 at 08:28
This may be correct for a page not using Server Side support, however it is wrong in relation to the specified .Net The correct way is to use Response.Redirect. – Phill Healey Nov 27 '15 at 16:09

score 41 · Answer 4 · answered Jul 30 '09 at 13:16

41

Try this:

Response.Redirect(Request.Url.AbsoluteUri);

answered Jul 30 '09 at 13:16

Andrew Hare

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It will just send a redirection page instead of the page, causing a loop that the browser will stop when it sees that it won't ever get a real page... – Guffa Jul 30 '09 at 13:24
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@Guffa that depends entirly on the context in which the redirect is used. If it's used in an action / code block that is specifically called based on an action or condition then it will only fire once every iteration and if coded correctly in isolation. – Phill Healey Nov 27 '15 at 16:10
This can result in loss of session data after the redirect. There's something about fully qualified urls that messes up sessions. – Chris Cudmore Oct 26 '16 at 14:54

score 14 · Answer 5 · answered Jul 30 '09 at 13:24

14

Use javascript's location.reload() method.

<script type="text/javascript">
  function reloadPage()
  {
    window.location.reload()
  }
</script>

answered Jul 30 '09 at 13:24

jrummell

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score 9 · Answer 6 · edited Jul 20 '15 at 14:38

9

There are various method to refresh the page in asp.net like...

Java Script

 function reloadPage()
 {
     window.location.reload()
 }

Code Behind

Response.Redirect(Request.RawUrl)

Meta Tag

<meta http-equiv="refresh" content="600"></meta>

Page Redirection

Response.Redirect("~/default.aspx"); // Or whatever your page url

edited Jul 20 '15 at 14:38

Brad Larson

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answered Apr 10 '15 at 13:27

Sunil Acharya

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None of these methods reloaded my HTML images from the server. Are these methods all deprecated, or are they not intended to hard reload images? – David.P Nov 15 '22 at 08:17
1

@David.P In that case, you need to check your application/website. If Meta Tag and java script is not working then its issue... check it once. – Sunil Acharya Mar 24 '23 at 11:49

score 7 · Answer 7 · answered Jul 30 '09 at 13:22

7

If you don't want to do a full page refresh, then how about wrapping what you want to refresh inside of a UpdatePanel and then do an asynchronous postback?

answered Jul 30 '09 at 13:22

Bryan Denny

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score 4 · Answer 8 · answered May 14 '14 at 03:30

I personally need to ensure the page keeps state, so all the text boxes and other input fields retain their values. by doing meta refresh it's like a new post, IsPostBack is always false so all your controls are in the initialized state again. To retain state put this at the end of your Page_Load(). create a hidden button on the page with an event hooked up, something like butRefresh with event butRefresh_Click(...). This code sets a timer on the page to fire a postback just like a user clicked the refresh button themselves. all state and session is retained. Enjoy! (P.S. you may need to put the directive in the @Page header EnableEventValidation="false" if you receive an error on postback.

//tell the browser to post back again in 5 seconds while keeping state of all controls
ClientScript.RegisterClientScriptBlock(this.GetType(), "refresh", "<script>setTimeout(function(){ " + ClientScript.GetPostBackClientHyperlink(butRefresh, "refresh") + " },5000);</script>");

score 3 · Answer 9 · edited Nov 13 '11 at 03:48

You can't do that. If you use a redirect (or any other server technique) you will never send the actual page to the browser, only redirection pages.

You have to either use a meta tag or JavaScript to do this, so that you can reload the page after it has been displayed for a while:

ScriptManager.RegisterStartupScript(this, GetType(), "refresh", "window.setTimeout('window.location.reload(true);',5000);", true);

score 3 · Answer 10 · edited Mar 05 '13 at 22:46

3

In your page_load, add this:

Response.CacheControl = "no-cache";
Response.AddHeader("Pragma", "no-cache");
Response.Expires = -1;

edited Mar 05 '13 at 22:46

answered Jan 19 '11 at 21:27

sjehutch

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score 2 · Answer 11 · edited Aug 15 '11 at 11:58

2

Response.Write("<script>window.opener.location.href = window.opener.location.href </script>");

edited Aug 15 '11 at 11:58

agf

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answered Oct 08 '10 at 14:39

farhana

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score 2 · Answer 12 · answered Dec 12 '16 at 16:47

2

The only correct way that I could do page refresh was through JavaScript, many of top .NET answers failed for me.

Response.Write("<script type='text/javascript'> setTimeout('location.reload(true); ', timeout);</script>");

Put the above code in button click event or anywhere you want to force page refresh.

answered Dec 12 '16 at 16:47

TheTechGuy

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Will this hard reload also HTTP images from the server? – David.P Nov 15 '22 at 08:18

score 2 · Answer 13 · answered Oct 06 '20 at 11:34

2

for asp.net core 3.1

Response.Headers.Add("Refresh", "2");// in secound

and

Response.Headers.Remove("Refresh");

answered Oct 06 '20 at 11:34

afshar

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This didn't work for me but there is not much explanation, so perhaps I misunderstood? I just added the first line to my existing code, between these 2 lines: Response.AddHeader("content-disposition", "attachment; filename=" + ZipFileName) 'Response.Headers.Add("Refresh", "2") Response.TransmitFile(ZipFilePath) 'File.FullName); – Zeek2 Jun 29 '21 at 16:00

score 2 · Answer 14 · answered Nov 14 '11 at 07:15

You can use 2 ways for solve this problem: 1) After the head tag

<head> 
<meta http-equiv="refresh" content="600">
</head>

2) If your page hasn't head tag you must use Javascript to implement

<script type="text/javascript">
  function RefreshPage()
  {
    window.location.reload()
  }
</script>

My contact:

http://gola.vn

How do I refresh the page in ASP.NET? (Let it reload itself by code)

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