Help: How to detect if the browser is closed?

Hi,

Would you please tell me how to detect if the client's browser is closed?

I need such event to trigger a database modification.

Thank you

hb

Nov 18 '05 #1

Subscribe Reply

5239

Mike Moore [MSFT]

Hi,

For the most part, your server will never know when the client browser is
closed. Here are some very limited things you can do to tell if the client
is still on your page (whether open or closed)

While your server is processing a request, if it takes a long time to
service that request, you can call Response.IsClie ntConnected to see if the
browser is still on your page.

You can add code to your page's client onunload event which could notify
your server that the page is unloading. This will not tell you if the
browser is being closed.
For example: <body onunload="alert ('closing');">

If you use this method, use showModalDialog to browse to a page which
notifies your server. That page will return JavaScript back to the dialog
with window.close(); .

Another option is that you could write an ActiveX control. However, that
control will only exist so long as the user is on your page. You still
won't know if they close the browser.

Essentially, the internet was designed such that the server only knows
about the browser while it is processing a request from the browser. The
rest of the time, the server is not aware of the browser.

Does this answer your question?

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------

From: "hb" <ho****@goodoff ices.com>
Subject: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 09:09:01 -0500
Lines: 11
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Hi,

Would you please tell me how to detect if the client's browser is closed?

I need such event to trigger a database modification.

Thank you

hb

Nov 18 '05 #2

Hi, Mike,

Thank you for the help.

Would you please tell me where should I put
if(Response.IsC lientConnected)
{
//do something
}

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:H$******** *****@cpmsftngx a06.phx.gbl...

Hi,

For the most part, your server will never know when the client browser is
closed. Here are some very limited things you can do to tell if the client
is still on your page (whether open or closed)

While your server is processing a request, if it takes a long time to
service that request, you can call Response.IsClie ntConnected to see if the browser is still on your page.

You can add code to your page's client onunload event which could notify
your server that the page is unloading. This will not tell you if the
browser is being closed.
For example: <body onunload="alert ('closing');">

If you use this method, use showModalDialog to browse to a page which
notifies your server. That page will return JavaScript back to the dialog
with window.close(); .

Another option is that you could write an ActiveX control. However, that
control will only exist so long as the user is on your page. You still
won't know if they close the browser.

Essentially, the internet was designed such that the server only knows
about the browser while it is processing a request from the browser. The
rest of the time, the server is not aware of the browser.

Does this answer your question?

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no rights.

--------------------
From: "hb" <ho****@goodoff ices.com>
Subject: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 09:09:01 -0500
Lines: 11
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <er************ **@TK2MSFTNGP10 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
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Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl
Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1913 66 X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi,

Would you please tell me how to detect if the client's browser is closed?
I need such event to trigger a database modification.

Thank you

hb

Nov 18 '05 #3

Mike Moore [MSFT]

Hi,

Here's an article that describes usage of IsClientConnect ed and includes a
code sample. It's old ASP code, but the concept remains the same.

182892 HOWTO: Use IsClientConnect ed to Check If Browser Is Connected
http://kb/article.asp?id=Q182892

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computer’s security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------

From: "hb" <ho****@goodoff ices.com>
References: <er************ **@TK2MSFTNGP10 .phx.gbl> <H$************ *@cpmsftngxa06. phx.gbl> Subject: Re: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 16:52:19 -0500
Lines: 90
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <es************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP12.phx.g bl
Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1915 30
X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi, Mike,

Thank you for the help.

Would you please tell me where should I put
if(Response.IsC lientConnected)
{
//do something
}

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:H$******** *****@cpmsftngx a06.phx.gbl...
Hi,

For the most part, your server will never know when the client browser is
closed. Here are some very limited things you can do to tell if the client is still on your page (whether open or closed)

While your server is processing a request, if it takes a long time to
service that request, you can call Response.IsClie ntConnected to see if

the
browser is still on your page.

You can add code to your page's client onunload event which could notify
your server that the page is unloading. This will not tell you if the
browser is being closed.
For example: <body onunload="alert ('closing');">

If you use this method, use showModalDialog to browse to a page which
notifies your server. That page will return JavaScript back to the dialog with window.close(); .

Another option is that you could write an ActiveX control. However, that
control will only exist so long as the user is on your page. You still
won't know if they close the browser.

Essentially, the internet was designed such that the server only knows
about the browser while it is processing a request from the browser. The
rest of the time, the server is not aware of the browser.

Does this answer your question?

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three

straightforward
steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no

rights.

--------------------
From: "hb" <ho****@goodoff ices.com>
Subject: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 09:09:01 -0500
Lines: 11
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <er************ **@TK2MSFTNGP10 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl
Xref: cpmsftngxa06.ph x.gbl

microsoft.publi c.dotnet.framew ork.aspnet:1913 66 X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi,

Would you please tell me how to detect if the client's browser is closed?
I need such event to trigger a database modification.

Thank you

hb

Nov 18 '05 #4

Hi, Mike,

I have tried the method provided by the article Q182892.

The IsClientConnect will become false when either the browser is closed or
the user is redirected to another URL. I tried to use Request.Url to catch
the
new URL after IsClientConnect =false, but the URL I caught stay the same.

Plus, the process uses about 70% CPU. So this method cannot be use in
production code.

What I am looking for is a way that can allow me to detect if the browser
gets closed or
if user gets redirected to another URL that has different domain. The result
of such detection
triggers a modification in database.

Would you please give me some ideas?

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:nw******** ******@cpmsftng xa06.phx.gbl...

Hi,

Here's an article that describes usage of IsClientConnect ed and includes a
code sample. It's old ASP code, but the concept remains the same.

182892 HOWTO: Use IsClientConnect ed to Check If Browser Is Connected
http://kb/article.asp?id=Q182892

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no rights.

--------------------
From: "hb" <ho****@goodoff ices.com>
References: <er************ **@TK2MSFTNGP10 .phx.gbl>

<H$************ *@cpmsftngxa06. phx.gbl>
Subject: Re: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 16:52:19 -0500
Lines: 90
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <es************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP12.phx.g bl
Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1915 30
X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi, Mike,

Thank you for the help.

Would you please tell me where should I put
if(Response.IsC lientConnected)
{
//do something
}

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:H$******** *****@cpmsftngx a06.phx.gbl...
Hi,

For the most part, your server will never know when the client browser is closed. Here are some very limited things you can do to tell if the client is still on your page (whether open or closed)

While your server is processing a request, if it takes a long time to
service that request, you can call Response.IsClie ntConnected to see if the
browser is still on your page.

You can add code to your page's client onunload event which could
notify your server that the page is unloading. This will not tell you if the
browser is being closed.
For example: <body onunload="alert ('closing');">

If you use this method, use showModalDialog to browse to a page which
notifies your server. That page will return JavaScript back to the

dialog with window.close(); .

Another option is that you could write an ActiveX control. However, that control will only exist so long as the user is on your page. You still
won't know if they close the browser.

Essentially, the internet was designed such that the server only knows
about the browser while it is processing a request from the browser. The rest of the time, the server is not aware of the browser.

Does this answer your question?

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the http://www.microsoft.com/protect site and perform the three

straightforward
steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no

rights.

--------------------
> From: "hb" <ho****@goodoff ices.com>
> Subject: Help: How to detect if the browser is closed?
> Date: Mon, 17 Nov 2003 09:09:01 -0500
> Lines: 11
> X-Priority: 3
> X-MSMail-Priority: Normal
> X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
> Message-ID: <er************ **@TK2MSFTNGP10 .phx.gbl>
> Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
> NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
> Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl
> Xref: cpmsftngxa06.ph x.gbl

microsoft.publi c.dotnet.framew ork.aspnet:1913 66
> X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet
>
> Hi,
>
> Would you please tell me how to detect if the client's browser is

closed?
>
> I need such event to trigger a database modification.
>
> Thank you
>
> hb
>
>
>

Nov 18 '05 #5

Mike Moore [MSFT]

Hi,

The internet (specifically the HTTP protocol) does not allow the server to
keep watch over the client. The things I've mentioned are what is available
for watching the client.

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computer’s security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------

From: "hb" <ho****@goodoff ices.com>
References: <er************ **@TK2MSFTNGP10 .phx.gbl> <H$************ *@cpmsftngxa06. phx.gbl>
<es************ **@TK2MSFTNGP12 .phx.gbl>
<nw************ **@cpmsftngxa06 .phx.gbl> Subject: Re: Help: How to detect if the browser is closed?
Date: Wed, 19 Nov 2003 10:41:06 -0500
Lines: 166
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <OR************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path: cpmsftngxa07.ph x.gbl!cpmsftngx a10.phx.gbl!TK2 MSFTNGXA05.phx. gbl!TK2MSFTNGP0 8
..phx.gbl!TK2MS FTNGP12.phx.gbl Xref: cpmsftngxa07.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1912 49
X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi, Mike,

I have tried the method provided by the article Q182892.

The IsClientConnect will become false when either the browser is closed or
the user is redirected to another URL. I tried to use Request.Url to catch
the
new URL after IsClientConnect =false, but the URL I caught stay the same.

Plus, the process uses about 70% CPU. So this method cannot be use in
production code.

What I am looking for is a way that can allow me to detect if the browser
gets closed or
if user gets redirected to another URL that has different domain. The result of such detection
triggers a modification in database.

Would you please give me some ideas?

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:nw******** ******@cpmsftng xa06.phx.gbl...
Hi,

Here's an article that describes usage of IsClientConnect ed and includes a
code sample. It's old ASP code, but the concept remains the same.

182892 HOWTO: Use IsClientConnect ed to Check If Browser Is Connected
http://kb/article.asp?id=Q182892

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three

straightforward
steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no

rights.

--------------------
From: "hb" <ho****@goodoff ices.com>
References: <er************ **@TK2MSFTNGP10 .phx.gbl>

<H$************ *@cpmsftngxa06. phx.gbl>
Subject: Re: Help: How to detect if the browser is closed?
Date: Mon, 17 Nov 2003 16:52:19 -0500
Lines: 90
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <es************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP12.phx.g bl
Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1915 30 X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi, Mike,

Thank you for the help.

Would you please tell me where should I put
if(Response.IsC lientConnected)
{
//do something
}

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:H$******** *****@cpmsftngx a06.phx.gbl...
> Hi,
>
> For the most part, your server will never know when the client browser is
> closed. Here are some very limited things you can do to tell if the

client
> is still on your page (whether open or closed)
>
> While your server is processing a request, if it takes a long time
to > service that request, you can call Response.IsClie ntConnected to see

if the
> browser is still on your page.
>
> You can add code to your page's client onunload event which could notify > your server that the page is unloading. This will not tell you if the > browser is being closed.
> For example: <body onunload="alert ('closing');">
>
> If you use this method, use showModalDialog to browse to a page which > notifies your server. That page will return JavaScript back to the

dialog
> with window.close(); .
>
> Another option is that you could write an ActiveX control. However, that > control will only exist so long as the user is on your page. You still > won't know if they close the browser.
>
> Essentially, the internet was designed such that the server only knows > about the browser while it is processing a request from the browser. The > rest of the time, the server is not aware of the browser.
>
> Does this answer your question?
>
> Thank you, Mike
> Microsoft, ASP.NET Support Professional
>
> Microsoft highly recommends to all of our customers that they visit the > http://www.microsoft.com/protect site and perform the three
straightforward
> steps listed to improve your computer's security.
>
> This posting is provided "AS IS", with no warranties, and confers no
rights.
>
>
> --------------------
> > From: "hb" <ho****@goodoff ices.com>
> > Subject: Help: How to detect if the browser is closed?
> > Date: Mon, 17 Nov 2003 09:09:01 -0500
> > Lines: 11
> > X-Priority: 3
> > X-MSMail-Priority: Normal
> > X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
> > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
> > Message-ID: <er************ **@TK2MSFTNGP10 .phx.gbl>
> > Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
> > NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
> > Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl > > Xref: cpmsftngxa06.ph x.gbl
microsoft.publi c.dotnet.framew ork.aspnet:1913 66
> > X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet
> >
> > Hi,
> >
> > Would you please tell me how to detect if the client's browser is
closed?
> >
> > I need such event to trigger a database modification.
> >
> > Thank you
> >
> > hb
> >
> >
> >
>

Nov 18 '05 #6

I got it.

Thank you for the help!

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:Ec******** ******@cpmsftng xa07.phx.gbl...

Hi,

The internet (specifically the HTTP protocol) does not allow the server to
keep watch over the client. The things I've mentioned are what is available for watching the client.

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no rights.

--------------------
From: "hb" <ho****@goodoff ices.com>
References: <er************ **@TK2MSFTNGP10 .phx.gbl> <H$************ *@cpmsftngxa06. phx.gbl>
<es************ **@TK2MSFTNGP12 .phx.gbl>
<nw************ **@cpmsftngxa06 .phx.gbl>
Subject: Re: Help: How to detect if the browser is closed?
Date: Wed, 19 Nov 2003 10:41:06 -0500
Lines: 166
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
Message-ID: <OR************ **@TK2MSFTNGP12 .phx.gbl>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
Path:

cpmsftngxa07.ph x.gbl!cpmsftngx a10.phx.gbl!TK2 MSFTNGXA05.phx. gbl!TK2MSFTNGP0 8 phx.gbl!TK2MSFT NGP12.phx.gbl
Xref: cpmsftngxa07.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1912 49
X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

Hi, Mike,

I have tried the method provided by the article Q182892.

The IsClientConnect will become false when either the browser is closed or the user is redirected to another URL. I tried to use Request.Url to catch the
new URL after IsClientConnect =false, but the URL I caught stay the same.

Plus, the process uses about 70% CPU. So this method cannot be use in
production code.

What I am looking for is a way that can allow me to detect if the browser gets closed or
if user gets redirected to another URL that has different domain. The

result
of such detection
triggers a modification in database.

Would you please give me some ideas?

Thank you

hb
""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
news:nw******** ******@cpmsftng xa06.phx.gbl...
Hi,

Here's an article that describes usage of IsClientConnect ed and includes a code sample. It's old ASP code, but the concept remains the same.

182892 HOWTO: Use IsClientConnect ed to Check If Browser Is Connected
http://kb/article.asp?id=Q182892

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the http://www.microsoft.com/protect site and perform the three

straightforward
steps listed to improve your computer's security.

This posting is provided "AS IS", with no warranties, and confers no

rights.

--------------------
> From: "hb" <ho****@goodoff ices.com>
> References: <er************ **@TK2MSFTNGP10 .phx.gbl>
<H$************ *@cpmsftngxa06. phx.gbl>
> Subject: Re: Help: How to detect if the browser is closed?
> Date: Mon, 17 Nov 2003 16:52:19 -0500
> Lines: 90
> X-Priority: 3
> X-MSMail-Priority: Normal
> X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
> Message-ID: <es************ **@TK2MSFTNGP12 .phx.gbl>
> Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
> NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
> Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP12.phx.g bl
> Xref: cpmsftngxa06.ph x.gbl

microsoft.publi c.dotnet.framew ork.aspnet:1915 30
> X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet
>
> Hi, Mike,
>
> Thank you for the help.
>
> Would you please tell me where should I put
> if(Response.IsC lientConnected)
> {
> //do something
> }
>
> Thank you
>
> hb
> ""Mike Moore [MSFT]"" <mi****@online. microsoft.com> wrote in message
> news:H$******** *****@cpmsftngx a06.phx.gbl...
> > Hi,
> >
> > For the most part, your server will never know when the client browser is
> > closed. Here are some very limited things you can do to tell if the client
> > is still on your page (whether open or closed)
> >
> > While your server is processing a request, if it takes a long time to > > service that request, you can call Response.IsClie ntConnected to see if
> the
> > browser is still on your page.
> >
> > You can add code to your page's client onunload event which could

notify
> > your server that the page is unloading. This will not tell you if the > > browser is being closed.
> > For example: <body onunload="alert ('closing');">
> >
> > If you use this method, use showModalDialog to browse to a page which > > notifies your server. That page will return JavaScript back to the
dialog
> > with window.close(); .
> >
> > Another option is that you could write an ActiveX control.
However,
that
> > control will only exist so long as the user is on your page. You still > > won't know if they close the browser.
> >
> > Essentially, the internet was designed such that the server only knows > > about the browser while it is processing a request from the
browser. The
> > rest of the time, the server is not aware of the browser.
> >
> > Does this answer your question?
> >
> > Thank you, Mike
> > Microsoft, ASP.NET Support Professional
> >
> > Microsoft highly recommends to all of our customers that they
visit the
> > http://www.microsoft.com/protect site and perform the three
> straightforward
> > steps listed to improve your computer's security.
> >
> > This posting is provided "AS IS", with no warranties, and confers

no > rights.
> >
> >
> > --------------------
> > > From: "hb" <ho****@goodoff ices.com>
> > > Subject: Help: How to detect if the browser is closed?
> > > Date: Mon, 17 Nov 2003 09:09:01 -0500
> > > Lines: 11
> > > X-Priority: 3
> > > X-MSMail-Priority: Normal
> > > X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
> > > X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
> > > Message-ID: <er************ **@TK2MSFTNGP10 .phx.gbl>
> > > Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
> > > NNTP-Posting-Host: x403446fe.ip.e-nt.net 64.52.70.254
> > > Path:

cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!TK2 MSFTNGP10.phx.g bl > > > Xref: cpmsftngxa06.ph x.gbl
> microsoft.publi c.dotnet.framew ork.aspnet:1913 66
> > > X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet
> > >
> > > Hi,
> > >
> > > Would you please tell me how to detect if the client's browser is > closed?
> > >
> > > I need such event to trigger a database modification.
> > >
> > > Thank you
> > >
> > > hb
> > >
> > >
> > >
> >
>
>
>

Nov 18 '05 #7

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