Opened Connections Are Closed After Transaction?
Mar 31, 2009
I am in the situation on preventing connection leaks. and one of the possible solutions is to make sure that all opened connections are closed after transaction. That means closing the sqldatareader too.
I am confused on the part of closing the sqldatareader. if the method that will be read by sqldatareader encounters error, it is not successfully initialize. If this happens, i will encounter an error once i close the sqldatareader. does it mean the most proper way of closing sqldatareader is like this?
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Nov 7, 2011
I have a Visual Studio 2008-SQL Server 2005 app that will be throwing alot at it. It's my testbed learning app. I'm also a student of this craft(43 years young) like another poster posted on another thread. I come from a PICK/BASIC jBase background. Anyway as-is my app has a connection to the database that is opened on form load. I close the connection on form close. It's a one form app currently. Is this wrong? It seems that maybe I should not have a connection opened possibly all day. I'm looking into incorporating Datasets, dataAdapters into my next phase of evolution. I looked at the material and it's tough. For me anyway. But I will get into it. I will fetch the data into a dataset so that I can keep the connection open only for a little while. I was turned on to this "keep the connection just as long as you need it" idea from someth
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Jul 19, 2011
Using VB.Net and SQL Server 2008 R2: I have recently had a database that using sp_who2 reflects a connection ".Net SqlClient Data Provider" is still active even though the .Net application has closed and disposed of all connections.
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May 24, 2012
I searched araound and having some difficulties in implementing one scenario with SQL Server 2000 and sybase.I have two SQL servers on different locations naming ServerA (MSSQL Server) and ServerB (Sybase server).I have a table called SALARY.Whenever I insert one record to customer SALARY in ServerA, I also will insert it into ServerB.If should any of them failed, both of them should be rolled back.I am using Asp .Net with VB for the programming.I do not have the right to change / add table in Server B. The only thing allowed in Server B is insert/delete/update record.I looked around and find a method to use TransactionScope but I am not quite sure it is the right way to do.url...
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May 29, 2009
In our VB 2008 we are making a lot of connections to sql server 2005 databases. Is there a possibillity to check with a program or a tool of 2005, all connections are closed?
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Sep 24, 2010
I have an app that opens and closes several other forms. How can I stop the fade in out of the forms when they are opened/closed in used in Vista/7? It just gets annoying.
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Jan 2, 2012
My program will need to store some settings for when the program gets closed then opened again. I would then like to reload the settings, and I was wondering what is the best way to do this with VB?
- Flat file
- Database
- Registry
- Other
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Feb 11, 2010
Is there a way to determine whether processes have been opened or closed during a given time frame? I'm working on code that will take an initial copy of your processes list, and then based on a timer, continue to take copies, which will compared to the initial processes list to determine which processes have been opened or closed until the timer ends. I'm capturing the processes list's in an Array list.
Dim processesList As String //Initial processes list
Dim processActivity As String //Opened or Closed processes
Dim processesAtStart As New ArrayList // Initial processes as ArrayList (To Compare)
Dim processesCheck As New ArrayList // Latest processes as ArrayList (To Compare)
[code]....
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Apr 14, 2009
i need to generate a category report that calculates the percentage of the tickets whereby the ticketstatus are closed and opened.I have to get the percentage of opened tickets by:(number of open tickets/total number of tickets) * 100 with that, i came up with a function in the class
below is the code:
Public Function DBSelect_TicketCategoryOpen() As DataTable
Dim local_dbConn As New SqlConnection
Dim local_sqlCommand As New SqlCommand
[code]....
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Oct 31, 2011
I want to know that do you still need to rollback your transaction if you haven't commit the transaction that was created earlier.
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Jan 28, 2009
My program will need to store some settings for when the program gets closed then opened again. I would then like to reload the settings?
- Flat file
- Database
- Registry
- Other
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May 9, 2011
I get this error at the Commit of a transaction in a desktop application:
This OleDbTransaction has completed; it is no longer usable.
Other posts I have seen with similar error suggests this can occur if it takes a long time, or contains large amounts of data. This is not the case here.Logging tells me it takes 140 ms from Begin to Commit and about 10 commands executed inside the transaction.It is using an Oracle database.This class is a simplified version of my database class:
Class MyDatabase
Private mConnection AS OleDbConnection
Private mTransaction AS OleDbTransaction
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Is it not allowed to run a select inside a transaction like this? Or can it be done by running the transaction in a specific isolation level (I see that the BeginTransaction method has an optional parameter for doing this) ? ..Or some other sollution..? In my case, it was not a problem to move the select to run before the transaction started, but what if you need to run selects that must run inside the transaction?
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Apr 29, 2009
I've seen plenty of examples of transactions in the actual store procedure's SQL. But I'm wanting to do the transaction and keep track of it in code. I tried this but it says that my insertcommand's transaction object is null. How can I fix this?
vb Dim conn As SqlConnection = DBConnections.SQLServerConnection
conn.Open()
Dim params(1) As SqlParameter
[CODE]....
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Mar 5, 2009
What is this kind of exception?
Error : Execute requires the command to have a transaction object when the connection assigned to the command is in a pending local transaction. The transaction property of the command has not been initialized..
This one causes the error: Dim oOperation As COperationOutputTypeBS
oOperation = COperationOutputTypeBS.GetOperationOutputType(txtOperationCode.Text)
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May 31, 2011
for example i have this code :
Sub Month()
Dim Conn As New Data.OracleClient.OracleConnection
Conn.Open()
Try
Dim Cmd As New Data.OracleClient.OracleCommand
With Cmd
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What will happen to the datareader when the Connection is closed ( Conn.close)
Will the Cursor that is used by the datareader be freed ? or will it stay open ?
If the cursor that is used by the datareader is still open , when will it be automatically closed ? or should i just closed it manually ?
Will it cause the dreaded "ORA-01000: maximum open cursors exceeded" ?
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Sep 22, 2010
I am getting the following error while handling transaction(Isoloation level is serializable) in Ado.Net."Transaction (Process ID 75) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction."
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May 20, 2010
Can I code to add transaction for some subs? If there is an error in any sub will roll back.For example,
sub1 delete some tables
sub2 insert data into tables which just be deleted
sub3 send out confirmation email
sub4 make submit button disable
I knew that transaction will work for sub1 and sub2 but I do not know if transaction will work for all of subs
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Sep 27, 2011
I've found my current side project has become a great learning experience and have decided to keep it going that way. What I'm trying to do is update a table from a DataTable. The datatable has been created and isn't a direct result of a
query otherwise I'd just use a update and not learn anything new. This is what I have for code thus far[code]...
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Jun 12, 2011
I'm having a hard time on using Transaction then after that I need to use sqldataadapter. When I tried the code below I'm having an error "ExecuteReader requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized." Pointing to this block.[code...]
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Mar 7, 2012
While working on some functions that update my database, I was writing some quick tests just to make sure my functions were executing properly. When it comes time to actually update the database I can pass a transaction to a function and then commit it:
user.Assignment("assignment value for some column in table", connection, transaction)
transaction.Commit()
I am curious if there is a way to write a quick test that can verify that the transaction will actually update certain rows before committing?
(pseudoish-code)
user.Assignment("assignment value for some column in table", connection, transaction)
If Not transaction["SomeColumn"] = "Expected value for SomeColumn"
assert("ColumnName was not going to be updated to the expected value!")
transaction.Rollback()
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Mar 20, 2012
In my project i am using begin transaction commit or rollback changes. but this causes lock to the tables in that particular functionality.
So if the any other user does any other functionality those locked table are not available until the transaction is completed. I want to know if there is any alternative to transaction which insures data security but the tables are not locked out.
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Jun 21, 2010
i am building a transaction called client search the location of movie in store which mean client search the movie then get the direction of the movie where it is located in store. So now i need to build classes for this transaction which i am unable to find it because i am confuse about direction table .
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Oct 8, 2011
I am using visual studio 2008. and i put dataset to use report wizard. but, when i compiled it, i got this errors.
Error1Property 'Transaction' is 'ReadOnly'.C:\Documents and Settings\mahalia\Desktop\NewProject\NewProject\DataSet2.Designer.vb292321NewProject
Error6'OracleDbTypeEx' is not a member of 'Oracle.DataAccess.Client.OracleParameter'.C:\Documents and Settings\mahalia\Desktop\NewProject\NewProject\DataSet2.Designer.vb299113NewProject
--- and when i locate it, i saw it in dataset.designer.vb.
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Sep 5, 2011
I am generating new code for a transaction.
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Mar 5, 2010
I'm learning about VB.Net and need to work with an SQLite database using the open-source System.Data.SQLite ADO.Net solution.The examples I found in the HOWTO section are only in C#. Would someone have a simple example in VB.Net that I could study to understand how to use transactions when INSERTing multiple parameters?[code]
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May 28, 2009
However, I've just inherited a problem and was wondering if anyone knows if I can solve it with a command line application written in .NET. Basically, we have a SAP transaction which has been written which imports data from a csv file.At the moment, it will be a manual process requiring someone to log in and run the transaction. Does anyone know if it's possible to action this from a command line app which we could then set up as a scheduled task?
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May 4, 2012
We are developping an application VB.net 2.0 and SQL 2005. Users are allowed to cancel a reception based on a purchase which may contains many received goods. But, during the process of cancellation, some questions are asked to users such as "Do you want to cancel Good #1".
If yes, delete. Then, "Do you want to cancel Good #2", no, do not delete and one another question (if received item is issued, a process must be made manualy by the user). And, at the end, if all goods were successfully cancelled, we have to cancel the reception itself. But sometime, if an error occurs or some conditions occurs once asked to user in this process, we want to cancel any actions made from the beginning and make it back to his original state. So I thought about Transaction.
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Mar 7, 2012
I am trying to use a transaction for the duration that the dialog is open and then commit the changes once the dialog has been ok�d or rollback'd if canceled by the user.My problem is when I use the transaction it is locking the whole of the tables that I�m using to update and insert new records too.I update the record in the first (current) table and insert a new record into the second (history) table. Obviously this is causing me problems as I only want the transaction to lock the specific records i'm updating and not allow a new insert record with my PK associated to my that I�m updating, not lock the whole of the 2 tables.This is my code[code]....
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Nov 11, 2011
I have 2 tables which I want to insert data into, table "CAM" and table "COut", after inserting data in "CAM" it shall return a retAutoID which will be hand to "COut" as one of the parameter required for it's insertion. I implemented a rollback in my Business Logic such that if "Cout" hits an exception error while inserting, the previous insertion for "CAM" will rollback even if successful.With the code below, I am getting this error after trying to do perform insertion:"ExecuteNonQuery requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized." [code]
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Jan 4, 2012
I'm trying to add transaction support to our database object.This object is a Remoting object. (this to ensure that on the Windows Client, no database connection is required.)Now I want to add support for transactions;Basically, a client will need to use it like this;
BeginTransaction
ExecuteNonQuery("insert...")
ExecuteNonQuery("insert...")
[code].....
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