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how to keep one connection between two aspx page calls

Hi

I have asp.net programs. I used a very simple data transfer method by using
URLs

First.aspx contents a line to send data to the second.aspx page, for
example: http://server/path/seond.apsx?data=mydata

There is a customer setting refresh rate in First.aspx page.

So, if customer set refresh rate to 6 sec (mydata could be different each
time), there are more then 10 different calls (connections) to
second.aspx from the same first.aspx page in one minute. This gave
me Error 403.9. (too many connections)

Is anyway I can keep the one connetions all the time between the two pages?

thanks
Nov 17 '05 #1
13 1905
Hello Larry:

With connection pooling in .NET you do not need to share the connection
object between web pages (though you can technically store it in the session
object). It might work better if you explicitly closed the connection after
you finished retrieving the data.

You can further read about the connection pooling on MSDN:
http://msdn.microsoft.com/library/de...taProvider.asp

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
Hi

I have asp.net programs. I used a very simple data transfer method by using
URLs

¡°First.aspx ± contents a line to send data to the ¡°second.aspx ¡± page, for
example: http://server/path/seond.apsx?data=mydata

There is a customer setting refresh rate in ¡°First.aspx ± page.

So, if customer set refresh rate to 6 sec (mydata could be different each
time), there are more then 10 different calls (connections) to
¡°second.aspx ¡± from the same ¡°first.aspx ± page in one minute. This gave
me Error 403.9. (too many connections)

Is anyway I can keep the one connetions all the time between the two pages?

thanks

Nov 17 '05 #2
will it be ok if I use the "connection lifetime" in my connection string?

"Server=mypc;Da tabase=mydata;U ser ID=sa;Password= ps;Trusted_Conn ection=True;
Connection Lifetime=5"

disconnect it after 6 sec.
thanks
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3D******** *************** ***********@mic rosoft.com...
Hello Larry:

With connection pooling in .NET you do not need to share the connection
object between web pages (though you can technically store it in the session object). It might work better if you explicitly closed the connection after you finished retrieving the data.

You can further read about the connection pooling on MSDN:
http://msdn.microsoft.com/library/de...us/cpguide/htm
l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp
HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
Hi

I have asp.net programs. I used a very simple data transfer method by using URLs

?First.aspx? contents a line to send data to the ?second.aspx? page, for example: http://server/path/seond.apsx?data=mydata

There is a customer setting refresh rate in ?First.aspx? page.

So, if customer set refresh rate to 6 sec (mydata could be different each time), there are more then 10 different calls (connections) to
?second.aspx? from the same ?first.aspx? page in one minute. This gave me Error 403.9. (too many connections)

Is anyway I can keep the one connetions all the time between the two pages?
thanks

Nov 17 '05 #3
Hello Larry,

You can certainly experiment with the Connection Lifetime values if you find
that it makes a difference. But, are you still getting the "too many
connections" error if you close the connection object directly after the
retrieval of the data is done in every page?
--
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
will it be ok if I use the "connection lifetime" in my connection string?

"Server=mypc;Da tabase=mydata;U ser ID=sa;Password= ps;Trusted_Conn ection=True;
Connection Lifetime=5"

disconnect it after 6 sec.
thanks
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3D******** *************** ***********@mic rosoft.com...
Hello Larry:

With connection pooling in .NET you do not need to share the connection
object between web pages (though you can technically store it in the

session
object). It might work better if you explicitly closed the connection

after
you finished retrieving the data.

You can further read about the connection pooling on MSDN:

http://msdn.microsoft.com/library/de...us/cpguide/htm
l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
Hi

I have asp.net programs. I used a very simple data transfer method by using URLs

?¡ãFirst.aspx ?¡À contents a line to send data to the ?¡ãsecond.asp x?¡À page, for example: http://server/path/seond.apsx?data=mydata

There is a customer setting refresh rate in ?¡ãFirst.aspx ?¡À page.

So, if customer set refresh rate to 6 sec (mydata could be different each time), there are more then 10 different calls (connections) to
?¡ãsecond.asp x?¡À from the same ?¡ãfirst.aspx ?¡À page in one minute. This gave me Error 403.9. (too many connections)

Is anyway I can keep the one connetions all the time between the two pages?
thanks


Nov 17 '05 #4
Trying to keep connections alive between page requests will only
excacerbate your problem. The symptoms you describe lead me to believe
that you're not closing and disposing of your connections properly.
Make sure you explicitly close all connections, and never open and
close them outside a single block of code.

Here is a typical lifecycle for one of your connections:

using (SqlConnection objConn = new SqlConnection(y ourConnectionSt ring))
{
objConn.Open();

// build your command, fill a dataset, or whatever

objConn.Close()
}

If your code is missing the using block or the .Close(), you run the
risk of it staying alive longer that you expect it to. Given your
description of the problem, I'd sat that is probably what's happening.
Good luck!

Jason Kester
Expat Software Consulting Services
http://www.expatsoftware.com

Nov 17 '05 #5
I did close the connetions, please check the code.

---------------------
switch ((CommandFuncti ons)Convert.ToI nt32(xmlNode.In nerText))
{
case CommandFunction s.Select:
strSQL = CreateSqlSelect (true);
*
if (xdData.Documen tElement == null )
{ *
if (GetConnection( ))
{
IDataReader dbDataReader = null;
try
{
GetCommand(strS QL);
dbDataReader = dbCommand.Execu teReader();
while (dbDataReader.R ead())
{* }
}
catch (System.Excepti on e) { * }
finally
{
if ( dbDataReader != null ) dbDataReader.Cl ose();
dbDataReader = null;
CloseConnection ();
}
UpdateCacheList (xnNode.OuterXm l);
}
}
break;
case: *
}
---------------------
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3E******** *************** ***********@mic rosoft.com...
Hello Larry,

You can certainly experiment with the Connection Lifetime values if you find that it makes a difference. But, are you still getting the "too many
connections" error if you close the connection object directly after the
retrieval of the data is done in every page?
--
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
will it be ok if I use the "connection lifetime" in my connection string?
"Server=mypc;Da tabase=mydata;U ser ID=sa;Password= ps;Trusted_Conn ection=True; Connection Lifetime=5"

disconnect it after 6 sec.
thanks
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3D******** *************** ***********@mic rosoft.com...
Hello Larry:

With connection pooling in .NET you do not need to share the connection object between web pages (though you can technically store it in the

session
object). It might work better if you explicitly closed the connection

after
you finished retrieving the data.

You can further read about the connection pooling on MSDN:

http://msdn.microsoft.com/library/de...us/cpguide/htm l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:

> Hi
>
>
>
> I have asp.net programs. I used a very simple data transfer method
by using
> URLs
>
>
>
> ???First.aspx?? contents a line to send data to the
???second.aspx? ? page, for
> example: http://server/path/seond.apsx?data=mydata
>
>
>
> There is a customer setting refresh rate in ???First.aspx?? page.
>
> So, if customer set refresh rate to 6 sec (mydata could be different

each
> time), there are more then 10 different calls (connections) to
> ???second.aspx? ? from the same ???first.aspx?? page in one
minute. This gave
> me Error 403.9. (too many connections)
>
>
>
> Is anyway I can keep the one connetions all the time between the two

pages?
>
>
>
> thanks
>
>
>


Nov 17 '05 #6
Well, the code you posted looks ok to me. There is no reason that it would
cause the "too many connections" error.

Look for other possible causes:

1- The other Cases in your Select block: Do any of them do an update using
another connection object?

2- The connectionManag ement element of your machine.config and web.config
(if any)
http://msdn.microsoft.com/library/de...entelement.asp

3- The frequency of this page being hit as compared to the time that the
query takes to complete.
That is my best guess.

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"larry" wrote:
I did close the connetions, please check the code.

---------------------
switch ((CommandFuncti ons)Convert.ToI nt32(xmlNode.In nerText))
{
case CommandFunction s.Select:
strSQL = CreateSqlSelect (true);
¡*
if (xdData.Documen tElement == null )
{ ¡*
if (GetConnection( ))
{
IDataReader dbDataReader = null;
try
{
GetCommand(strS QL);
dbDataReader = dbCommand.Execu teReader();
while (dbDataReader.R ead())
{¡* }
}
catch (System.Excepti on e) { ¡* }
finally
{
if ( dbDataReader != null ) dbDataReader.Cl ose();
dbDataReader = null;
CloseConnection ();
}
UpdateCacheList (xnNode.OuterXm l);
}
}
break;
case: ¡*
}
---------------------
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3E******** *************** ***********@mic rosoft.com...
Hello Larry,

You can certainly experiment with the Connection Lifetime values if you

find
that it makes a difference. But, are you still getting the "too many
connections" error if you close the connection object directly after the
retrieval of the data is done in every page?
--
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:
will it be ok if I use the "connection lifetime" in my connection string?
"Server=mypc;Da tabase=mydata;U ser ID=sa;Password= ps;Trusted_Conn ection=True; Connection Lifetime=5"

disconnect it after 6 sec.
thanks
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3D******** *************** ***********@mic rosoft.com...
> Hello Larry:
>
> With connection pooling in .NET you do not need to share the connection > object between web pages (though you can technically store it in the
session
> object). It might work better if you explicitly closed the connection
after
> you finished retrieving the data.
>
> You can further read about the connection pooling on MSDN:
>
http://msdn.microsoft.com/library/de...us/cpguide/htm l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp
>
> HTH,
> Phillip Williams
> http://www.societopia.net
> http://www.webswapp.com
>
>
> "Larry" wrote:
>
> > Hi
> >
> >
> >
> > I have asp.net programs. I used a very simple data transfer method by using
> > URLs
> >
> >
> >
> > ???First.aspx?? ¨¤ contents a line to send data to the ???second.aspx? ?¨¤ page, for
> > example: http://server/path/seond.apsx?data=mydata
> >
> >
> >
> > There is a customer setting refresh rate in ???First.aspx?? ¨¤ page.
> >
> > So, if customer set refresh rate to 6 sec (mydata could be different
each
> > time), there are more then 10 different calls (connections) to
> > ???second.aspx? ?¨¤ from the same ???first.aspx?? ¨¤ page in one minute. This gave
> > me Error 403.9. (too many connections)
> >
> >
> >
> > Is anyway I can keep the one connetions all the time between the two
pages?
> >
> >
> >
> > thanks
> >
> >
> >


Nov 17 '05 #7

"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:4C******** *************** ***********@mic rosoft.com...
Well, the code you posted looks ok to me. There is no reason that it would cause the "too many connections" error.

Look for other possible causes:

1- The other Cases in your Select block: Do any of them do an update using another connection object?
Yes, I did use UPDATE here in another case statement.
2- The connectionManag ement element of your machine.config and web.config
(if any)
http://msdn.microsoft.com/library/de...us/cpgenref/ht
ml/gngrfconnection managementeleme nt.asp
Please tell me what is the Max connection number? my machine.config file has
"<add name = "*" maxconnection = "2" />"
3- The frequency of this page being hit as compared to the time that the
query takes to complete.
I think it is very hard to measure. ??

That is my best guess.

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"larry" wrote:
I did close the connetions, please check the code.

---------------------
switch ((CommandFuncti ons)Convert.ToI nt32(xmlNode.In nerText))
{
case CommandFunction s.Select:
strSQL = CreateSqlSelect (true);
?-
if (xdData.Documen tElement == null )
{ ?-
if (GetConnection( ))
{
IDataReader dbDataReader = null;
try
{
GetCommand(strS QL);
dbDataReader = dbCommand.Execu teReader();
while (dbDataReader.R ead())
{?- }
}
catch (System.Excepti on e) { ?- }
finally
{
if ( dbDataReader != null ) dbDataReader.Cl ose();
dbDataReader = null;
CloseConnection ();
}
UpdateCacheList (xnNode.OuterXm l);
}
}
break;
case: ?-
}
---------------------
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3E******** *************** ***********@mic rosoft.com...
Hello Larry,

You can certainly experiment with the Connection Lifetime values if you
find
that it makes a difference. But, are you still getting the "too many
connections" error if you close the connection object directly after
the retrieval of the data is done in every page?
--
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"Larry" wrote:

> will it be ok if I use the "connection lifetime" in my connection

string?
>
> "Server=mypc;Da tabase=mydata;U ser

ID=sa;Password= ps;Trusted_Conn ection=True;
> Connection Lifetime=5"
>
> disconnect it after 6 sec.
> thanks
>
>
> "Phillip Williams" <Ph************ **@webswapp.com > wrote in message
> news:3D******** *************** ***********@mic rosoft.com...
> > Hello Larry:
> >
> > With connection pooling in .NET you do not need to share the

connection
> > object between web pages (though you can technically store it in the > session
> > object). It might work better if you explicitly closed the connection > after
> > you finished retrieving the data.
> >
> > You can further read about the connection pooling on MSDN:
> >
>

http://msdn.microsoft.com/library/de...us/cpguide/htm
> l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp
> >
> > HTH,
> > Phillip Williams
> > http://www.societopia.net
> > http://www.webswapp.com
> >
> >
> > "Larry" wrote:
> >
> > > Hi
> > >
> > >
> > >
> > > I have asp.net programs. I used a very simple data transfer method by
> using
> > > URLs
> > >
> > >
> > >
> > > ???First.aspx?? contents a line to send data to the

???second.aspx? ?
> page, for
> > > example: http://server/path/seond.apsx?data=mydata
> > >
> > >
> > >
> > > There is a customer setting refresh rate in ???First.aspx??
page. > > >
> > > So, if customer set refresh rate to 6 sec (mydata could be different > each
> > > time), there are more then 10 different calls (connections) to
> > > ???second.aspx? ? from the same ???first.aspx?? page in one minute.
> This gave
> > > me Error 403.9. (too many connections)
> > >
> > >
> > >
> > > Is anyway I can keep the one connetions all the time between the

two > pages?
> > >
> > >
> > >
> > > thanks
> > >
> > >
> > >
>
>
>


Nov 17 '05 #8
"larry" <la***@abc.co m> wrote in news:OsBkAwtpFH A.3960
@TK2MSFTNGP12.p hx.gbl:
3- The frequency of this page being hit as compared to the time that the
query takes to complete.


I think it is very hard to measure. ??


Run the query in Query Analyzer to see how long it takes to execute...

--
Lucas Tam (RE********@rog ers.com)
Please delete "REMOVE" from the e-mail address when replying.
http://members.ebay.com/aboutme/coolspot18/
Nov 17 '05 #9
Hello Larry,

The maxconnection number is as the name sounds. For example if your
datareader takes 20 seconds to complete and there are 3 requests on this page
during those 20 seconds then you will definitely get an error because you
only have 2 connections available for this web application. This number
should be decided upon for each application together with your database
administrator.

As for measuring the time of your query, I would simply place Response.Write
(System.DateTim e.Now.ToLongTim eString ()) before dbCommand.Execu teReader()
and after you closed the connection.

Note also the difference between the DataReader and using Dataset and
DataAdapter.Fil l method. "While a DataReader is open, the Connection is in
use exclusively by that DataReader. You will not be able to execute any
commands for the Connection, including creating another DataReader, until the
original DataReader is closed." (As quoted from MSDN) whereas the
DAtaAdapter.Fil l method shares the connection with other processes "If the
connection is closed before Fill is called, it is opened to retrieve data,
then closed. If the connection is open before Fill is called, it remains
open." (As quoted from the MSDN)

So in summary, you can try a few things to resolve this:
1- Find out the time that the DataReader keeps the connection open,
2- Increase the maxconnection number (after consulting with you DB admin)
3- Use a DataSet and DataAdapter instead of a datareader
Hope this helps.

Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"larry" wrote:

"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:4C******** *************** ***********@mic rosoft.com...
Well, the code you posted looks ok to me. There is no reason that it

would
cause the "too many connections" error.

Look for other possible causes:

1- The other Cases in your Select block: Do any of them do an update

using
another connection object?


Yes, I did use UPDATE here in another case statement.
2- The connectionManag ement element of your machine.config and web.config
(if any)

http://msdn.microsoft.com/library/de...us/cpgenref/ht
ml/gngrfconnection managementeleme nt.asp


Please tell me what is the Max connection number? my machine.config file has
"<add name = "*" maxconnection = "2" />"
3- The frequency of this page being hit as compared to the time that the
query takes to complete.


I think it is very hard to measure. ??

That is my best guess.

HTH,
Phillip Williams
http://www.societopia.net
http://www.webswapp.com
"larry" wrote:
I did close the connetions, please check the code.

---------------------
switch ((CommandFuncti ons)Convert.ToI nt32(xmlNode.In nerText))
{
case CommandFunction s.Select:
strSQL = CreateSqlSelect (true);
?-
if (xdData.Documen tElement == null )
{ ?-
if (GetConnection( ))
{
IDataReader dbDataReader = null;
try
{
GetCommand(strS QL);
dbDataReader = dbCommand.Execu teReader();
while (dbDataReader.R ead())
{?- }
}
catch (System.Excepti on e) { ?- }
finally
{
if ( dbDataReader != null ) dbDataReader.Cl ose();
dbDataReader = null;
CloseConnection ();
}
UpdateCacheList (xnNode.OuterXm l);
}
}
break;
case: ?-
}
---------------------
"Phillip Williams" <Ph************ **@webswapp.com > wrote in message
news:3E******** *************** ***********@mic rosoft.com...
> Hello Larry,
>
> You can certainly experiment with the Connection Lifetime values if you find
> that it makes a difference. But, are you still getting the "too many
> connections" error if you close the connection object directly after the > retrieval of the data is done in every page?
> --
> Phillip Williams
> http://www.societopia.net
> http://www.webswapp.com
>
>
> "Larry" wrote:
>
> > will it be ok if I use the "connection lifetime" in my connection
string?
> >
> > "Server=mypc;Da tabase=mydata;U ser
ID=sa;Password= ps;Trusted_Conn ection=True;
> > Connection Lifetime=5"
> >
> > disconnect it after 6 sec.
> > thanks
> >
> >
> > "Phillip Williams" <Ph************ **@webswapp.com > wrote in message
> > news:3D******** *************** ***********@mic rosoft.com...
> > > Hello Larry:
> > >
> > > With connection pooling in .NET you do not need to share the
connection
> > > object between web pages (though you can technically store it in the > > session
> > > object). It might work better if you explicitly closed the connection > > after
> > > you finished retrieving the data.
> > >
> > > You can further read about the connection pooling on MSDN:
> > >
> >
http://msdn.microsoft.com/library/de...us/cpguide/htm > > l/cpconConnection PoolingForSQLSe rverNETDataProv ider.asp
> > >
> > > HTH,
> > > Phillip Williams
> > > http://www.societopia.net
> > > http://www.webswapp.com
> > >
> > >
> > > "Larry" wrote:
> > >
> > > > Hi
> > > >
> > > >
> > > >
> > > > I have asp.net programs. I used a very simple data transfer method by
> > using
> > > > URLs
> > > >
> > > >
> > > >
> > > > ???First.aspx?? ¡§¡è contents a line to send data to the
???second.aspx? ?¡§¡è
> > page, for
> > > > example: http://server/path/seond.apsx?data=mydata
> > > >
> > > >
> > > >
> > > > There is a customer setting refresh rate in ???First.aspx?? ¡§¡è page. > > > >
> > > > So, if customer set refresh rate to 6 sec (mydata could be different > > each
> > > > time), there are more then 10 different calls (connections) to
> > > > ???second.aspx? ?¡§¡è from the same ???first.aspx?? ¡§¡è page in one minute.
> > This gave
> > > > me Error 403.9. (too many connections)
> > > >
> > > >
> > > >
> > > > Is anyway I can keep the one connetions all the time between the two > > pages?
> > > >
> > > >
> > > >
> > > > thanks
> > > >
> > > >
> > > >
> >
> >
> >


Nov 17 '05 #10

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Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
10863
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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10422
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9588
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development projectplanning, coding, testing, and deploymentwithout human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7978
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupr who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
7136
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
6007
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
2
4230
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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