Like many sites, mine has a standard "look" -- a template, if you will
-- that visitors see on each page. I've tried to keep the code and HTML
separate to the extent possible, and for most standard page
presentations, it works well.
However, I have a couple of screen scrape / import routines that can
take minutes, even hours, to complete. I'd like to have some way of
outputting my template first to the browser, and then within the
template, providing feedback to the user as the import progresses. I've
yet to figure out how to do this. If I do, e.g. ... (pseudo code)
<script runat="server">
Response.Write( userfeedback);
Response.Flush;
</script>
....from within the code, I can provide good feedback, but these lines
will end up in the browser before any the rest of the template arrives.
If, instead I do, e.g. ... (pseudo code)
<script runat="server">
StringBuilder sb = new Stringbuilder() ;
sb.Append(userf eedback);
myControl.Text = sb.ToString();
</script>
<html>
<body>
<asp:Literal id="myControl" runat="server" />
</body>
</html>
....I may have to wait a very long time before seeing anything on the screen.
Is there any way to output the template first, and then target my
Response.Write/Response.Flush statements to, say, a <div> or some kind
of <asp:n> control?
Thanks for any input!
--Brent 2  1587 
this is probably a bad approach. minutes is sorta ok, hours is too long, the
browser will shut down. also if the user get bored, and quicks, your
execution will abort. you shoudl swich to a queueing syatem where the page
queues up the request, then polls for the results. this means if it runs for
1/2 hour, the user can go away, come back and check the status.
your current approach is push content to the browser and have it rendered
right away. this will work as long as the markup is simple. if you
processing message appear in a table, then the browser will wait for the end
tags of the table before rendering, and thus defeat you purpose. if you want
header to apper try this:
<html>
<!-- all my template stuff -->
<script runat=server>
DoLongRunngProc ess();
</script>
<!-- more template stuff>
</html>
in DoLongRunngProc ess(), call Response.Write( ), Response.Flush( ) to output
your processing messages. be sure page Buffering is turned off. remeber if
the template is too complex the browser may not render until all html has
been received.
-- bruce (sqlwork.com)
"Brent" <""b b i g l e r \"@ y a h o o . c o m"> wrote in message
news:11******** *****@corp.supe rnews.com... Like many sites, mine has a standard "look" -- a template, if you will --
that visitors see on each page. I've tried to keep the code and HTML
separate to the extent possible, and for most standard page presentations,
it works well.
However, I have a couple of screen scrape / import routines that can take
minutes, even hours, to complete. I'd like to have some way of outputting
my template first to the browser, and then within the template, providing
feedback to the user as the import progresses. I've yet to figure out how
to do this. If I do, e.g. ... (pseudo code)
<script runat="server">
Response.Write( userfeedback);
Response.Flush;
</script>
...from within the code, I can provide good feedback, but these lines will
end up in the browser before any the rest of the template arrives.
If, instead I do, e.g. ... (pseudo code)
<script runat="server">
StringBuilder sb = new Stringbuilder() ;
sb.Append(userf eedback);
myControl.Text = sb.ToString();
</script>
<html>
<body>
<asp:Literal id="myControl" runat="server" />
</body>
</html>
...I may have to wait a very long time before seeing anything on the
screen.
Is there any way to output the template first, and then target my
Response.Write/Response.Flush statements to, say, a <div> or some kind of
<asp:n> control?
Thanks for any input!
--Brent
Thanks, Bruce.
Do you have a place I can learn about queuing and polling? Sounds like a
better option!
--Brent
Bruce Barker wrote: this is probably a bad approach. minutes is sorta ok, hours is too long, the
browser will shut down. also if the user get bored, and quicks, your
execution will abort. you shoudl swich to a queueing syatem where the page
queues up the request, then polls for the results. this means if it runs for
1/2 hour, the user can go away, come back and check the status. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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