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The response.redirect method is great for moving a user from one page to another. However, it does have one major limitation--you can only use it if absolutely nothing has been written to the page. Sometimes, you actually do want to write something to the page and then redirect it, for example when displaying the status of an operation. In this case, the following JavaRedirect function comes in handy. It requires a Java compatible browser. (Note:this script has been changed to incorporate Lewis Moten's helpful suggestions).
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By using this code, you agree to the following terms...
- You may use
this code in your own programs (and may compile it into a program and distribute it in compiled format for languages that allow it) freely and with no charge.
- You MAY NOT redistribute this code (for example to a web site) without written permission from the original author. Failure to do so is a violation of copyright laws.
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'**************************************
' Name: A better response.redirect
' Description:The response.redirect method is great for moving a user from one page to another. However, it does have one major limitation--you can only use it if absolutely nothing has been written to the page. Sometimes, you actually do want to write something to the page and then redirect it, for example when displaying the status of an operation. In this case, the following JavaRedirect function comes in handy. It requires a Java compatible browser. (Note:this script has been changed to incorporate Lewis Moten's helpful suggestions).
' By: Ian Ippolito (vWorker)
'
'This code is copyrighted and has' limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=0&lngWId=4'for details.'**************************************
sub JavaRedirect (strURL)
'Response.Write "redirect to:" & strURL
%>
<SCRIPT language="JavaScript">
<!--
window.location.href =
'<%=URL%>';
//-->
</SCRIPT>
<%
end sub
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Other 34 submission(s) by this author
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Your Vote
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Other User Comments
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 4/21/2000 8:19:55 AM: cpsarros
Excellent simplicity
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6/3/2000 11:55:28 AM: Tony
Err... It would be much easier to set the following line server-side:
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6/3/2000 12:10:37 PM: Tony
Response.Buffer = True
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6/5/2000 12:12:34 PM: Ian Ippolito
Tony,
I appreciate the feedback but doing response.buffer = true doesn't quite do the same thing. If you use that method, the redirect will succeed, but you won't actually see the text that was output to the screen before hand. That won't work for the 'status' situation described.
Ian
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6/17/2000 7:52:32 AM: serkan
this is so cool. thnx.
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7/21/2000 12:32:00 PM: Lewis Moten
If you want to let users see content before redirecting them, you can always use META tags to refresh the page to another URL after a specified amount of time. More browsers would be compatable with this method. Your code doesn't even use timers to give the users time to see what you have written.
Also, your javascript is in a vbScript format.
1. javascript is case sensitive
2. javascript uses {} to define content within if comparisons.
this will definately crash your browsers. here is the real deal.
';
//-->
There is no need to test for netscape browsers by doing it this way.
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7/21/2000 4:45:28 PM: Ian Ippolito
Lewis,
Thanks for the feedback, but the META tag method only works if you know in advance how long the operation is going to take, and alot of times you don't. For example on Planet Source Code, I use the above script when an author submits code so I can display a status. I can't predict in advance how long the upload will take, because each upoad is a different size and each user has a different speed connection.
Regarding {} to wrap comparisons--I've never read any Javascript book describing this as a legal way to do comparisons.
However, I do like your final one line solution. I don't know why I originally did the trap for Netscape that way (this is kind of old code...)
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7/22/2000 4:36:34 PM: Lewis Moten
Cool. Another approach would be to have a function called after the page completly loads . then the function would call a timer to change the location after the user has some time to read the page. There are many different approaches to this situation. I was just unaware of the specific requirements. I usually use the {} tags just about everywhere so that i can stay away from any possible errors that may arise in different versions of javaScript. thanks for the reply.
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10/3/2000 1:13:25 PM: Merlyn
You can use the Response.Redirect even if you have written to the page by using Response.Buffer = True in this case all data to the page is buffered until the page is processed or you force the contents of the buffer to the page.
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10/7/2000 12:58:20 PM: Ian Ippolito
Merlyn,
Thanks for the feedback...but this is the same thing Tony said above. See the response to his message...
Ian
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10/19/2001 4:30:07 PM: Mike Wees
Ian,
I have a question related to this, I couldn't find it answered anywhere else. I'm trying to program a GoBack routine. I want to emulate the user pressing the Back button on the browser so that all the form values are retained. Any idea on the code for this? Thanks in advance.
MW
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11/16/2001 11:18:38 AM: John Tolar
Actully, the last question had nothing to do with the topic or code. But, try history.Back();
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2/18/2002 2:37:29 PM: Imvain
For comparison to the Javascript solution.
Im kind partial to the location.replace(); function.
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2/19/2002 11:29:46 AM: A1 Programmer
If the user Presses the [ Back ] Button on the browser, the form values will be Retained, but anyway...
href=
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2/19/2002 11:30:55 AM: a1 programmer
Back
or
Back
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3/4/2002 11:20:03 PM: Sam Moses
good stuff. This approach never occurred to me. Thanks for the insight.
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5/16/2002 11:42:44 AM: xmetrix@aol.com
response.buffer=true
response.flush
response.redirect(
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5/16/2002 12:36:13 PM: Ian Ippolito (psc)
Thanks xmetrix, but like the others, it still doesn't help with the situation described above "Sometimes, you actually do want to write something to the page and then redirect it". The code you put up would never display anything.
Ian
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9/13/2002 4:13:29 AM:
Hi, how can I use Response.Redirect and target the page if I am using either frames ot Iframes. Many thanks, Mike
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9/13/2002 4:16:11 AM:
Hi, how do I use Response.Redirect with frames if I want to break out of the frames and use target="_parent". Many thanks, Mike
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9/13/2002 11:19:22 PM: Ian Ippolito (psc)
Mike,
Javascript can bust you out of the frameset, but I don't think response.write will do the trick, because it will only basically redirect the user in the current frameset/pane that it is opened up in. Of course there are ways around that...for example, if you set the target for the frame = _parent...then the response.redirect would work. But your situation may or may not allow you to do this.
Ian
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9/19/2002 2:47:28 PM:
i really don´t know what people thinking about. Look my work:
keep loling
<% some asp code go here lol %>
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9/19/2002 5:54:37 PM: Ian Ippolito (psc)
You didnt leave your name, but whomever you are...please read the previous comments before posting. You're the 3rd or 4th person on this thread I've had to explain why the same 'solution' doesn't work for this scenario. I'm not going to do it again...please see above, so we don't have to waste anymore bandwidth on this..thanks.
Ian
Ian
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9/27/2002 6:08:16 AM:
To those trying to 'correct' Ians coding:
I think its cool and all that your trying to put your minds together and make things better but, one of the main reasons i like this code is its simplicity, no meta calls needed and it works!! I think the code is great just as it is.
Thanks
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12/2/2002 1:51:55 PM:
This is great! It help me solve my problem. Now I can disable a submit button after click on it and before redirect it to a new page. This can avoid duplicate form submissions.
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12/4/2002 10:22:18 AM:
I just wanted to say that this code rocks! I didnt use all of the original code, but it was good enough for me to take it and make it do what I needed. Thanks!!
Eric Krauss
Application Programmer
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4/28/2003 1:23:45 PM:
I am new to ASP. Actually I am very new to ASP. There is no comment for the codes. Is the code suppose to display the status of redirecting to a new page?
Can you explain this part?
*****************************
';
//-->
***********************************
it looks like you commented the whole thing out.
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4/28/2003 1:50:23 PM: Ian Ippolito (RAC)
No it doesn't display a status..just redirects the user to the page.
The comment is a 'trick' to make sure that it is only seen by browsers that support the Javascript tag (and is seen as a comment by those that don't). This code was written a long time ago, when not all browsers did support it. Today, most do, and it's pretty safe to remove the start and end comments.
Ian
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5/13/2003 8:43:32 AM:
Another handy way is to use server.transfer. Description below
Transfer
The transfer method sends all of the information that has been assembled for processing by one .asp file to a second .asp file.
Syntax
Server.Transfer (path)
Parameters
Path
The location of the .asp file to which control should be transferred.
Remarks
When you call Server.Transfer, the state information for all the built-in objects will be included in the transfer. This means that any variables or objects that have been assigned a value in session or application scope will be maintained. In addition, all of the current contents for the request collections will be available to the .asp file receiving the transfer.
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6/22/2003 2:27:54 AM:
Ian, this bit of code was exactly what I needed for my current project. Works great, and easy to understand. Thanks!
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6/22/2003 10:11:11 AM: Ian Ippolito (RAC)
Great...I'm glad to hear it. :)
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7/1/2003 4:51:47 AM:
where to place your code?
i have this lines of code
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7/1/2003 4:53:34 AM:
where to place your code?
i have
this lines of code
<%
Dim rsRecords, sql
Set rsRecords = Server.CreateObject("ADODB.Recordset")
ID = Request("ID")
Response.Write(Request("ID"))
sql = "DELETE ID FROM records WHERE ID= " & ID &" "
Response.Write(sql)
connDatabase.Execute sql
Response.Redirect("listing.asp")
%>
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7/1/2003 10:17:49 AM: Ian Ippolito (RAC)
You can place it anywhere...usually at the end of your processing. So place a call to it as the last line of your code.
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6/20/2004 4:12:07 PM:
Like someone else mentioned, the Server.Transfer method is pretty nice as well.
Btw the meta tag has a big drawback in my opinion, that one can easily disable it on IE. Javascript also can be disabled, but is not as easy. Anyway I have used all 3 methods and I stuck with Server.Transfer, as the usage is the same as Response.Redirect:
Server.Transfer "yourpage.asp"
PS. Server.Transfer only works on ASP 3.0
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7/29/2004 2:24:13 PM: PHP Duo
And also, when someone uses frames like hotmail forcibly embeds each of the links in the email body, it's usefull. I always see RAC's link get redirected to the main page destroing frames unlike META refresh where the page is redirected within the sub-frame.
Ian, do you use some other technique for that on RAC?
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