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I tried it again, I don't know why the new data are just getting appended but not updating the database.
rachael
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In the 12 years ive been developing software ive never been so stumped on one issue for so long...
I took over the design of the companies web application from my boss.
I tidied up 75% of the code and now have a pretty tidy way of doing things as follows...
each page inherits a page called 'basePage', this has all the necessary functions in it for data manipulation, such as...
<br />
GetConnection() as SqlConnection (returns it unopened but populated with the connection string)<br />
GetDataTable(sql as string) as DataTable<br />
ExecuteQuery(sql as string) as integer<br />
etc...<br />
Recently we started getting "Timeout Expired" errors "while obtaining a connection from the pool".
Ive tried various extremities of parameters in the connection string such as "min pool size=5;max pool size=1000;connect timeout=90;". and have read numerous articles on the subject.
I have also turned off connection pooling entirely and still receive the same error (differing only by not mentioning "the pool").
Before you ask - yes, i am using try catch blocks in my basepage functions and always closing and disposing my objects in the finally block.
Today i received no less than 840 timeout error reports on the server in one hour - there was only 46 people using the application at the most within that hour.
The timeouts seem to happen all at once for a few minutes, like a big bottleneck. The server itself was running fine - not even brushing 50% cpu usage. But the web application itself would slow down quite badly, taking up to a minute to serve the page.
I set up some tracing and noticed that some pages made no less than 60 calls per page load to the GetConnection() method 
This is due to various business objects being called and checking data etc...
Before i even suggest that any of the business model be redesigned, id like to ask.. has anyone ever come across this type of situation before?
are most of you spitting coffee on your monitor over the 60 page calls like i nearly did? 
or have you seen this before in big applications with many components?
Any help, comments or suggestions are welcomed.
Regards,
Guy
---Guy H (  ---
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Guy Harwood wrote: I set up some tracing and noticed that some pages made no less than 60 calls per page load to the GetConnection() method
Is the code closing the connection before getting another?
Guy Harwood wrote: are most of you spitting coffee on your monitor over the 60 page calls like i nearly did?
You might want to see if you can rationalise some of these calls. For example, if you alwasy call the same three stored procedures in sucession then you might be able to create a wrapper stored procedure that calls the other three so you can only doing one call to the database. You can then iterate over the result sets and pull out multiple sets of data from one database call. (If you are using DataReaders the NextResult() method is the one that moves to the next result set)
The thing that causes the most slow down in an application is roundtrips to the database. If you can reduce the number of roundtrips it would improve performance, and reduce the number of connections you are making.
I'll also admit that I've never had to alter the timeout of the connection from the 15 second default.
By the way, what edition of SQL Server are you using?
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Hi Colin,
Yes the code always closes the connection before getting another.
Ive used the nextresult() stuff before, very handy and will come in useful when i end up knocking down those 60 calls per page load!
We are using SQL Server 2000 with SP4 on 2003 server.
The server has 3GB ram and 2 Xeon 2.4GHZ processors (effectively 4 cpus according to sql server).
I did notice something odd in the event viewer application log earlier that was entered right about the time the errors started pouring in...
Error: 15457, Severity: 0, State: 1
Configuration option 'show advanced options' changed from 1 to 1. Run the RECONFIGURE statement to install.
wasnt doing any maintenance and never seen it before.
---Guy H ( ---
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Guy Harwood wrote: Error: 15457,
If you Google “SQL Server 15457” there are quite a number of hits, would seem error code 15457 is an informational error code, but most of the people posing questions about this error code have the same issues you’re experiencing. Most of the issues seem to be related to the db getting locked or query time out values changed. Might want to take a look.
http://www.experts-exchange.com/Databases/Microsoft_SQL_Server/Q_20684322.html[^]
I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:
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For some stupid reason i never looked this up 
seems a restart solved the problem. gonna look into it more and see what i find.
thanks everyone 
---Guy H ( ---
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Guy Harwood wrote: seems a restart solved the problem.
 Hope it works out for yea.
I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:
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Hi 2 all,
Is there enyone who have explanation
about this error
Server: Msg 8624, Level 16, State 21, Line 52
Internal SQL Server error.
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alexrad wrote: Is there enyone who have explanation
about this error
Would you care to tell us what you were doing at the time?
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Google[^]
"My advice to you is to get married. If you find a good wife, you will be happy; if not, you will become a philosopher." Socrates
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Need support....
I d'like to copy a file aspnetdb.mdf (ms sql 2005 db) created with microsoft visual web developer 2005 to my websites host. I have already a website copied with asp 2.0 sites to my host without problems.
But now it is the first time that i try to copy a ms sql 2005 db. The aspnetdb.mdf works fine on my local PC. Now the provider told me, that i have to create a db Login in his Control Panel for accessing sql 2005 server.
I have to define a Login user name and a password. And later a sql 2005 db.
My Problem: Why should i create an new sql 2005 db on the host server. I d'like to transfer my local sql 2005 db (microsoft visual web developer 2005) to the host?
What changes are necessary in the web.config:
The definition on my local pc:
<connectionStrings>
<add name="ASPNETDBConnectionString1" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
Do I have to add a user id and a password?
What connection string is necessary to access to my host sql server?
Do you know some recommended tutorials? I could not see a solution in the following video:
http://www.asp.net/learn/videos/view.aspx?tabid=63&id=5
Thanks a lot for your support.
You see -- I am a beginner....
Best regards
ullk
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ullk wrote: My Problem: Why should i create an new sql 2005 db on the host server. I d'like to transfer my local sql 2005 db (microsoft visual web developer 2005) to the host?
Becuase the log in information is held in the master database. That has to map to the users set up in the individual database. If the internal user ids don't match between your database and the master database then when you log in it won't know what set of permissions to use on the database.
ullk wrote: Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;Integrated Security=True;User Instance=True
I'd imagine that your ISP has a full SQL Server set up. In which case you will be connecting to a database that is defined in the server rather than a file that it attaches to the server when called. You'll have to change your connection string to reflect that - You'll need to speak to your ISP for the details for the Data Source and Database elements of the connection string. And you'll drop the AttachDbFilename part. (most likely)
ullk wrote: Do I have to add a user id and a password?
Only your ISP can answer that. It depends how they've set up their SQL Server. The login that you create in your ISP's control panel may be a SQL Log in, or it may be one you can use for a trusted connection. I'd imagine that it would be the SQL Login though - it would be easier for your ISP to manage.
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Right now I have a program that queries a database and saves the data into a a strongly typed dataset
Then I perform various calculations on each record and fill in 5 null fields with data
Lastly, I click upload and it does a for loop, for each data row and calls the update method to update the database with the calculated values.
This works all fine and dandy, except the upload part is rather slow.
it looks something like
DataAdapter.StoredProcedureUpdate(Primary key, NewValue1, NewValue2, NewValue3, NewValue4, NewValue5)
I'm guessing that the upload part is slow because its repeating a process where 3/4 of the work done is not the update function
1. creating the connection
2. connecting and authnicating
3. calling the update procedure
4. closing the connection
I'm still somewhat new to ADO.NET so I'm not quite sure if its actually doing this.
Does anyone have some good suggestions on a better method?
Perhaps a way to call a bulk update through ADO.net or SQL?
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Guys , This is a popular Interview question,
i would like to know the various queries that can be written to achieve this.
Table: Employee
Columns: Name, Salary
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Select TOP 1 Name,Salary From (
Select TOP 3 Name, salary from Employee order by Salary DESC
) as temp
order by Salary ASC
Keep Smiling !!!
Parwej Ahamad
g_parwez@rediffmail.com
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knee pads 
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... and lip balm to prevent chapped lips while kissing all those butts.
the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer
Deja View - the feeling that you've seen this post before.
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ednrgc wrote: knee pads
---Guy H (  ---
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Hi
I have to populate some datas from sql server database and display it directly in a CSV Format or CSV file. When i run the project it should provide me an option to whether open or save or cancel the file. when i click open it should be opened and be viewed in a excel sheet in CSV format and when i click save it should ask the destination folder and should be saved there in CSV format and when i click cancel it should be cancelled and the application should be closed. pls note that all these actions should happen in the same browser and should not be redirected to anyother page. Can anybody help me?
Regards
Vijay.
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This is too vague - we are not going to write your software for you. Please break down your problem into smaller parts and if you have difficulty on any particular part then you can come back and ask for help. Be specific about what it is you need help with.
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hey man,
please be specific, we r here for doubts at places where anyone is struck,
regards,
karam C Bose
Pasamulla manidharappa, naanu meesai vacha Kolzandhai yappa.
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I have a problem with a stored procedure.
I create it with this code below, and when I refresh in MS Server Management, procedure is there. As soon as I refresh my application (ASP.NET) that cunsumes this procedure, I get an Object reference not set to an instance of an object, error.
I go back to MS Server Management, hit refresh and stored procedure that previously was there, is gone...
That explains the error, but I don't know why's this happening.
I've noticed that when I change the name of a procedure, then it works:
[spForumPost] - work
[spForumGetNumberOfPosts] - don't work
Sql is OK since I have run it.
Any ideas?
if exists(select * from dbo.sysobjects where id = object_id(N'[spForumGetNumberOfPosts]') and OBJECTPROPERTY(id, N'isProcedure') = 1)
drop procedure [spForumGetNumberOfPosts]
GO
CREATE PROCEDURE [spForumGetNumberOfPosts]
(
@SubForumId int
)
-- WITH ENCRYPTION
AS
begin
select Count(*) as PostsNumber
from posts left join threads on posts.threads_id = threads.threads_id
where
threads.subforums_id = @SubForumId;
end -- end spForumGetPostsNum
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Kasic Slobodan wrote: I get an Object reference not set to an instance of an object
You might want to show your C#/VB code rather than the SQL as it looks more likely the problem is there rather than with the SQL.
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Sorry about that...
When I execute the sql from the procedure, everything runs great, no error.
Here's the code:
MSSqlConn is a class for connecting to MSSql database.
public static int getPostsNum(int podForumId)
{
int tmp;
MSSqlConn s = new MSSqlConn();
s.OpenConn("EXEC [spForumGetNumberOfPosts] " + podForumId);
s.dr.Read();
tmp = (int)s.dr["PostsNumber"];
s.CloseConn();
return tmp;
}
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So which line is causing the exception?
Kasic Slobodan wrote: s.OpenConn("EXEC [spForumGetNumberOfPosts] " + podForumId);
It is a bad idea to inject values into SQL Strings - it can lead to SQL Injection Attacks. Also ADO.NET has the facility to handle calling stored procedures directly.
e.g.
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "StoredProcedureName";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@paramName", paramValue);
Kasic Slobodan wrote: s.dr.Read();
Does this return true or false - you don't check it. If it returns false then there is nothing to read and the following line could fail.
Kasic Slobodan wrote: return tmp;
Sorry - this more code review like than helping with your problem - As a general rule nothing should be called tmp, temp, temporary or varients thereof. I generally use the name "result" for any value that is to be returned out of a method. It makes the purpose clearer and when reading the code later makes it easier to understand what is going on.
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