1. I have a chain of six asynch callbacks initiated by a button, and want
the page to refresh at the end of each callback to display
A. Results of a SQLServer query showing cumulative running time, and
B. A progress bar.
2. I have this working with a refresh timer:
<META http-equiv="refresh" content="5">
3. However, the blinking of page reloads is annoying, and I'd prefer to have
the page reload at exactly the end of each callback EndInvoke.
What is the command to force page reload in C#?
4. One of my HandleCompletio ns is below, with the place indicated where I
want to reload the page.
Thanks for any help.
Alan
private void HandleUpdateCap italCompletion( IAsyncResult asyncResult)
{
try
{
// Retrieve Update delegate object
UpdateCapitalDe legate updateCapital = (UpdateCapitalD elegate)
asyncResult.Asy ncState;
//Call EndInvoke to get result of UpdateCapital
string updateCapitalRe sult = updateCapital.E ndInvoke(asyncR esult);
//*** RELOAD THE PAGE HERE ****
// Start next delegate in chain
StartUpdateAver ageCapitalDeleg ate();
}
catch (Exception ex)
{
// Exception will be thrown by EndInvoke if Update() threw an exception
Console.Error.W riteLine(ex.ToS tring());
}
}
Nov 18 '05
18  10146 
Steven,
1. Just a note to thank you for your help and sample files on the
Refresh/iFrame method of handling async calls.
Everything is working fine.
1. I have one question remaining:
Is there a way to programmaticall y turn the http-equiv = "refresh" on and
off?
Or some equivalent JScript method?
Thanks.
Alan
Hi Alan,
Thanks for the followup. To answer your question:
1. I have no idea how to control the http-equiv = "refresh" meta of the
page
2. Of course ,we can use javascript code to post a page after a certain
period of time. The
window.setTimeo ut function is just for such function. For example:
We define the following function "setTimer() " and in it we add the
window.setTimeo ut("document.fo rms[0].submit()",1000 );
which indicate that the page will be submit 1 second later after we call
this function.
<script language="javas cript">
function setTimer()
{
window.setTimeo ut("document.fo rms[0].submit()",1000 );
}
</script>
Then, we can call this function at the page's clientside's onload event,
just like:
<body onload="setTime r()" >
And if we want to control whether to call it or not at serverside. We can
use
Page.RegisterSt artupScript method to programmaticall y add this script call,
just as below:
private void Page_Load(objec t sender, System.EventArg s e)
{
Page.RegisterSt artupScript("se tTimer","<scrip t
language='javas cript'>setTimer ();</script>");
}
Hope this helps. Thanks.
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey http://msdn.microsoft.com/asp.net/whidbey/default.aspx
Steven,
Thanks again for the detailed example.
I will try it out and let you know how it goes.
Regards,
Alan
"Steven Cheng[MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:Ve******** ******@cpmsftng xa10.phx.gbl... Hi Alan,
Thanks for the followup. To answer your question:
1. I have no idea how to control the http-equiv = "refresh" meta of the
page
2. Of course ,we can use javascript code to post a page after a certain
period of time. The
window.setTimeo ut function is just for such function. For example:
We define the following function "setTimer() " and in it we add the
window.setTimeo ut("document.fo rms[0].submit()",1000 );
which indicate that the page will be submit 1 second later after we call
this function.
<script language="javas cript">
function setTimer()
{
window.setTimeo ut("document.fo rms[0].submit()",1000 );
}
</script>
Then, we can call this function at the page's clientside's onload event,
just like:
<body onload="setTime r()" >
And if we want to control whether to call it or not at serverside. We can
use
Page.RegisterSt artupScript method to programmaticall y add this script
call, just as below:
private void Page_Load(objec t sender, System.EventArg s e)
{
Page.RegisterSt artupScript("se tTimer","<scrip t
language='javas cript'>setTimer ();</script>");
}
Hope this helps. Thanks.
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
Hi Steven,
I realized what I'd like to do is the following:
1. Right now, my Progress page has six async calls and completion handlers.
The Refresh page is continually refreshing every 5 seconds and is contained
in the Progress page as an iFrame..
2. Instead of the continual refreshes of the Refresh page, I would like to
call a refresh (Submit) of the Refresh page as part of each completion
handler on the main Progress page.
That way, the Refresh page would only refresh at completion of each of the
six async routines.
3. Is this possible, i.e. either
(a) calling a "submit" of the iFrame on the Progress page, or
(b) passing a submit command through to the Refresh page from the Progress
page completion handlers?
Thanks again for your help and examples.
Regards,
Alan
"Steven Cheng[MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:Ve******** ******@cpmsftng xa10.phx.gbl... Hi Alan,
Thanks for the followup. To answer your question:
1. I have no idea how to control the http-equiv = "refresh" meta of the
page
2. Of course ,we can use javascript code to post a page after a certain
period of time. The
window.setTimeo ut function is just for such function. For example:
We define the following function "setTimer() " and in it we add the
window.setTimeo ut("document.fo rms[0].submit()",1000 );
which indicate that the page will be submit 1 second later after we call
this function.
<script language="javas cript">
function setTimer()
{
window.setTimeo ut("document.fo rms[0].submit()",1000 );
}
</script>
Then, we can call this function at the page's clientside's onload event,
just like:
<body onload="setTime r()" >
And if we want to control whether to call it or not at serverside. We can
use
Page.RegisterSt artupScript method to programmaticall y add this script
call, just as below:
private void Page_Load(objec t sender, System.EventArg s e)
{
Page.RegisterSt artupScript("se tTimer","<scrip t
language='javas cript'>setTimer ();</script>");
}
Hope this helps. Thanks.
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
Hi Alan,
Thanks for the response. As for the #1 and #2 in your further description,
I don't think they're possible. You means you want to refresh the iframe
page only when the async call finish? Then, I wonder how you make the async
call ,at clientside or at serverside? If at serverside, since the web based
application is request/response mode, we can't get the async call 's call
back and the only way is to constantly refresh the page(post back to
server) to query the serverside state info, do you think so?
As for the
=============== ============
(a) calling a "submit" of the iFrame on the Progress page, or
(b) passing a submit command through to the Refresh page from the Progress
page completion handlers?
=============== ============
you mentioned, do you mean using javascript to post back the iframe page ?
If so, this is ok, we can referece the iframe element in the Progress page
via
var frm = document.getEle mentById(iframe Id);
Then call
frm.document.fo rms[0].submit(); to submit the iframe page(refresh page).
In fact, this is the general javascript skills. Here are some web resources
on manipulating iframe in javascript http://developer.netscape.com/suppor...ascript.html#4 http://www.quirksmode.org/js/iframe.html http://www.xs4all.nl/~ppk/js/iframe.html
############### ####
In addition, I'm not sure whether you've ever trying calling webservice via
DHTML javascript in web page? This is also a means to call serverside
webservice in clientside script so as to prevent page be postedback to
server. Here is the reference in MSDN:
#Accessing Web Services From DHTML http://msdn.microsoft.com/library/en...01.asp?frame=t
rue http://msdn.microsoft.com/library/de...thor/webservic
e/overview.asp
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey http://msdn.microsoft.com/asp.net/whidbey/default.aspx
Hi Steven,
Thanks again very much for your examples and the references. Your help has
been invaluable!
Regards,
Alan
"Steven Cheng[MSFT]" <v-******@online.m icrosoft.com> wrote in message
news:$K******** ******@cpmsftng xa10.phx.gbl... Hi Alan,
Thanks for the response. As for the #1 and #2 in your further description,
I don't think they're possible. You means you want to refresh the iframe
page only when the async call finish? Then, I wonder how you make the
async call ,at clientside or at serverside? If at serverside, since the web
based application is request/response mode, we can't get the async call 's call
back and the only way is to constantly refresh the page(post back to
server) to query the serverside state info, do you think so?
As for the
=============== ============
(a) calling a "submit" of the iFrame on the Progress page, or
(b) passing a submit command through to the Refresh page from the Progress
page completion handlers?
=============== ============
you mentioned, do you mean using javascript to post back the iframe page ?
If so, this is ok, we can referece the iframe element in the Progress page
via
var frm = document.getEle mentById(iframe Id);
Then call
frm.document.fo rms[0].submit(); to submit the iframe page(refresh page).
In fact, this is the general javascript skills. Here are some web
resources on manipulating iframe in javascript
http://developer.netscape.com/suppor...ascript.html#4
http://www.quirksmode.org/js/iframe.html
http://www.xs4all.nl/~ppk/js/iframe.html
############### ####
In addition, I'm not sure whether you've ever trying calling webservice
via DHTML javascript in web page? This is also a means to call serverside
webservice in clientside script so as to prevent page be postedback to
server. Here is the reference in MSDN:
#Accessing Web Services From DHTML
http://msdn.microsoft.com/library/en...01.asp?frame=t rue
http://msdn.microsoft.com/library/de...thor/webservic e/overview.asp
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
Hello,
Would it be possible for you to send me these examplea as I can’t see them attached in posts?
Try using outlookexpress as your newsgroup reader.
It should pick up the attachments.
That may be your problem.
The server address is msnews.microsof t.com
Alan
"David P" <da**********@h otmail.com> wrote in message
news:22******** *************** ***********@mic rosoft.com... Hello,
I could be going mad here but the link
http://msdn.microsoft.com/newsgroups...d-57287813491d
Shows only text no examples, could you please send me these as I seem to
be trying to do exactly what you have done here
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