Question

Autorefresh Of ASPX Page Inheriting a .DLL File

Asked by: rkneal

I am having an issue trying to auto-refresh an ASPX page that is inheriting a .DLL file I have in my /bin directory.  Here is the code for my ASPX page.

The MobiileTrend.DLL file has three functions that are called from Page_Load.  One checks the Browser type, if supported browser then next function grabs all the passed in values after the ? in the link.(example: http://mylink/default.aspx?tag=tag1&server=myserver), and the last one builds a Graphic file and renders it on the screen as a .GIF file.  It works fine if I hit the refresh button on the browser.  I have tried to use <meta http-equiv="refresh" content="600"> but it doesn't work.  Any other ideas how I can get this to auto refresh the page?      

<%@ Page Language="vb" AutoEventWireup="false" Inherits="MobileTrend.MobileTrend" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
     <title>Smart Phone Trend</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    </div>
    </form>
</body>
</html>

                                  
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Asked On
2009-10-26 at 18:14:03ID24845815
Tags

ASP.NET

,

ASP

,

Visual Basic

Topic

NetBeans IDE

Participating Experts
1
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Comments
9

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Answers

 

by: HainKurtPosted on 2009-10-26 at 18:36:38ID: 25668564

<meta http-equiv="refresh" content="600"> refreshes the page every 10 minutes...
is there any url to test? I could not understand the problem exactly...
you open http://mylink/default.aspx?tag=tag1&server=myserver in the browser, it does not display anything, but when you click refresh it shows the image, right?

 

by: rknealPosted on 2009-10-26 at 18:52:51ID: 25668621

That link is just an example, the link to the working page is not accessible via the internet.

When I hit the link it works.  When I refresh the page it works.  But when I try to create a method for auto-refreshing the page (so user doesn't have to keep hitting refresh)  nothing I have tried works.  I am unsure if it has something to do with using the System.Drawing and System.Drawing.Drawing2D namespaces.  The page creates a Trend picture as a .GIF and then displays it on the screen.  

 

by: HainKurtPosted on 2009-10-26 at 20:42:11ID: 25668989

try fiddler, make refresh timeout 10
and check whats happening to the side... maybe it is cached...

 

by: HainKurtPosted on 2009-10-26 at 20:50:51ID: 25669019

try this...

<body onload="setTimeout()">

<script>
var url = location.href;
var newurl;
var ts = new Date();
var ix = location.href.indexOf("&ts")
if (ts == -1) newurl = url + "&ts=" + ts;
else newurl = url.substr(0,ix) + "&ts=" + ts;
location.href=newurl;
</script>

 

by: HainKurtPosted on 2009-10-26 at 20:51:59ID: 25669023

above solution will work if the probles is page cashing... it may have some syntax error, not tested...
idea is, add a timestamp to url, and get that page, so browser will think it is a new page and reload the page...

 

by: rknealPosted on 2009-10-26 at 21:00:27ID: 25669051

Still no luck.  I found a link with an example that can reconsruct my issue.

http://msdn.microsoft.com/en-us/library/system.web.httpresponse.outputstream.aspx

If copy the Visual Basic example and paste it into an ASPX page.  Then open the ASPX page in Internet Explorer.  The page opens just fine with an ASP.Net Sample picture that has some boxes that randomly move when the page is refreshed.  When open the page everything works great, if you refresh the page everything works great.  But if I add some auto-refresh code using the <META> tag, refresh does not work.  Any other ideas?  

 

by: HainKurtPosted on 2009-10-26 at 21:27:46ID: 25669130

because it is clearing all page headers...

 

by: rknealPosted on 2009-11-03 at 13:54:19ID: 25734214

So does this mean there is no way of Auto-Refreshing the page when using the sample from the link above?  

 

by: rknealPosted on 2009-11-16 at 10:54:53ID: 25832772

I was able to use AJAX to create an ASPX page that called up the APSX page to redraw the image on a counter time interval.  

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