C# - Why ThreadAbortException When Trying To Close A SqlConnection In .NET

Apr 26, 2012

I keep getting the following exception when I do:

[code]...

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How To Close A Sqlconnection

May 17, 2010

i would like to know if there's something wrong in this asp.net code:

mydatareader = mycmd.executeReader()
if myDataReader.HasRow then
// Do something

[code].....

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C# - What Happens If Close A SqlConnection Before The SqlDataReader

Jun 2, 2009

What would happen if you call Close() on a SqlConnection object before you call Close() on a SqlDataReader using that connection?

Actually, what I really want to know is whether or not the order in which you Close them matters. Does calling SqlConnection.Close() completely close the connection, or will it remain open if you do not call Close() on a SqlDataReader using that connection?

I don't think I really understand how connection closing works.

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How To Completely Close SQLConnection String

May 16, 2011

I'm running a multithreaded application that connects to a database, the connections are closed when I'm done with them (and I dispose of all the threads). I've tried clearing the connection pools, setting pooling=false and I've used both .dispose and .close.

I get the error "cannot drop the database X because it is currently in use" if I try to drop the database I connected to after the connections have all been closed.

Below is my code:
Dim comExecuteInsert As New SqlCommand
Dim comm As New SqlConnection
If (Not comm Is Nothing) Then
comm = Nothing
End If
[Code] .....

The stored procedure creates temporary tables which it later drops and inserts data into tables existing in the database.

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C# - 'System.Threading.ThreadAbortException' In ASP.net Page

May 23, 2012

I have the below code in my ASP.net page:

Response.StatusCode = 404
Response.Write(strResult)
Response.End()

The code above throws "An exception of type 'System.Threading.ThreadAbortException' occurred and was caught."

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RTF Close - Add A Close Button To Menu Strip That Will Just Close The Currently Opened File

Jan 16, 2009

I'm currently in the process of building a text editor type program, and have run into a brick wall. I haven't done VB in years, so I may just need a little reminder on some things. I have coded everything so far as far as opening files, saving them, changing fonts, colors, etc. However, I'm looking to add a Close button to my menu strip that will just close the currently opened file, and not the entire program, while also ask the user if he/she would like to save before closing the file, and then if they select yes, it will show the save dialog, and if not, it will go ahead and close the currently opened item.

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.net - Sqlconnection Is Not Defined

Jan 13, 2011

I am trying to update some code. I have a vb file that begins with this...

Imports System.Data.SqlClient
Imports System.Data.Sql
Imports System.Data.SqlTypes

[Code].....

...and it accepts it. Why do I need to explicitly write out System.Data.SqlClient every time I use an object from that class???

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SqlConnection And Sql Express?

Jul 20, 2011

I am confused about something and I hope someone here can give me an answer

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Ado.net SqlConnection Open Method

Nov 20, 2011

I am learning ADO.NET But it very hard for me... I dont understand why have got this compiler error:"Declaration expected" for the connection.Open().[code]

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Creating A SqlConnection From A Function?

Aug 13, 2010

I'm having a problem with my global connection function. It used to be a readonly property but I changed it to a function because the code anaylsis engine was complaining about my property raising exceptions. The function is designed to take account of our offsite database mirroring system, so if it can't create a connection to the principal server it switches the connection string to the mirror server. This works fine in another project we have:

Public Shared Function Connection() As SqlConnection
If String.IsNullOrEmpty(ActiveConnectionString) = True Then
Throw New PropertyNotSetException("Cannot call Connection() before

[Code].....

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Monitoring The SqlConnection State?

Jun 19, 2009

I have a SqlConnection global variable in my proyect that it is always open (I wouldn't like to start a discussion about keep the connection open all the time or close it everytime a transaccion is executed).

This variable is sent to every class I need to execute a function or method. Instead of checking the connection in every single operation, is there any way to monitor the connection state in a centralized way ?

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SqlConnection Transaction Support?

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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VS 2010 Reuse An SQLConnection?

Jan 28, 2011

I am recently new to Visual Basic and am starting to learn some things i have managed to connect to the SQL Server and Insert rows to a table. But is there a way to be able to re-use an already existing connection ?My code below. I tried to create a class for the Connection object.

Imports System.Data.SqlClient
Imports System.Data.Sql
Public Class dbConnection

[code]....

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Are Object SqlConnection And SQLCommand Disposed

May 20, 2010

[code]in this code, do the objects con and cmd get disposed because the return statement is placed before the end using statement.

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Building A Dynamic Sqlconnection String?

Jul 14, 2011

Imports System.Data.Sql
Imports System.Data.SqlClient
Imports System.Configuration
Module Module1

[code].....

this is my connection string on my pc how can i make this as a dynamic connectionstring so i cant remove the db and get a new connectionstring?

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Difference Between Using DataContext Class And SqlConnection?

Mar 2, 2012

I asked a question earlier where I was told a simple way to "bind data to objects" is to just run a SqlConnection(connectionString). The response also included a comment saying I could get fancy with L2S and Entity Frameworks, so I looked deeper into those. It seems all you have to do with the DataContext object is point to the database. Why would SqlConnection be a benefit? What is the difference (or pros/cons) of using either one of these? Is one more "standard"? Is one more modern?

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HTML SqlConnection Connection = Getconnection()

Jul 17, 2009

HTML SqlConnection connection = Getconnection() Anybody knows which reference should be added for Getconnection()? I am using 2008. Tried System.Data but...

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Sql - Create ASP.NET Syndication Feeds With SqlConnection And .NET?

May 19, 2009

This seems to be a great article by Scott Mitchell for creating syndicated feeds in ASP.NET 3.5. The problem for me is that it uses C# and Linq, which I'm not as sharp on at the current time.[URL]...Does anyone know where an example might exist for the System.ServiceModel.Syndication namespace that can produce a syndicated feed like this article using VB.NET and a SQLConnection object?

I've looked around and every example seems to be produced in C# and Linq (which is probably a testament to my need to learn them soon rather than later).

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SQLConnection - Max Pool Size Reached

Nov 1, 2009

My code read a thousand files, and for each file a connection is made and open to check against a recordset in SQL. After 143 files, the application will stopped and thrown this exception regarding maximum pool size reached. What I don't understand is I'm closing the connection after every file is processed, could it be I'm doing it incorrectly?

Please see my code below. I was only able to make this work by setting max pool size = 3000 in the connection string, since closing the connection does not seem to work.[code...]

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Sqlconnection Vs Oledbconnection And DB Access 2003?

Nov 6, 2009

I have seen some comments about the difference of sqlconnection vs oledbconnection.

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Public Shared SqlConnection - Used In Multiple Functions

Jan 29, 2010

I have an asp.net web app. It has a shared class, and I want to have the connection string the same through out the site. My string is in my web config, but I don't want to type this all over the place:

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Using Same Connection String In A DataContext Constructor And SqlConnection?

Oct 4, 2011

I am preparing to deploy a web service that uses SqlConnection primarily as its means to get to the database, and I am adding some new methods that use a DataContext instead of thatand the default constructor and DBML file would use a connection string refering to my development machine (I believe...)

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VS 2008 - Download Sqlconnection Data Component?

Jan 26, 2012

i want to know how to download sqlconnection data component, which site i can download....

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'SqlConnection' Is Ambiguous In The Namespace 'System.Data.SqlClient'?

Mar 10, 2009

I have imports namespace System.Data.SqlClient.I just create object of SqlConnection,But error is there-
'SqlConnection' is ambiguous in the namespace 'System.Data.SqlClient'.

[Code]...

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.net - Will SqlConnection's Dispose Method Interfere With Connection Pool

Jul 20, 2011

From my understanding, .Net will pool SqlConnection objects where the Connection String is the same by default. Will the connection still be pooled if I call the Dispose method? This question is asked under the context of an ASP .Net application that at times makes many hits to the database in a single PageLoad event. I want the connections to be pooled, but would like confirmation that Closing and Disposing of the connection once the data operation is complete does not interfere with .Net's handling of the connection pool.

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Odbc.OdbcConnection Vs. OleDb.OleDbConnection And Sqlclient.SqlConnection?

Apr 27, 2009

I have a VB.net 2005 application that will use both Access and SQL server databases. I have DSN namesfor both access and sql server database. I used OleDb.OleDbConnection to open the Access database and it works fine. I am trying to make it work with sql server database. Do I have to have to have separate source codes using Sqlclient.SqlConnection and its related name spaces? Can I use odbc.OdbcConnection name space

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[2008] Select Random A Column In SQL 2005 Using SqlConnection?

Jan 18, 2009

It's possible to select random a column in SQL 2005 using SqlConnection? And this column to send "UserID" e " ChName" for Label1.Text and Label2.Text?

example: after choosing random the column, send "UserID" and "ChName" to Label1.Text and Label2.Text.

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VS 2005 'SqlConnection' Is Ambiguous In The Namespace 'System.Data.SqlClient'?

Jan 23, 2011

I am creating class libraries in my project so that I can update code without having to update the whole app.I created a class library project and added some code to it. I also added a reference to System.Data.SqlClient and also imported it into the class file.I am getting an error and I have never seen it before. Been looking online and not able to find an answer yet.

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VS 2010 - ThreadPool And SqlConnection Pooling - Error: Timeout Expired

Jul 21, 2010

I am working on uses the ThreadPool class and specifically the QueueUserWorkItem method to launch its background tasks. I am however having an issue related to SqlConnection timeouts. My error is this: "Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached."

This code is using all available ThreadPool threads because it is processing nearly 100,000 items, each on a threadpool thread, and updating an SQL database. So my question is this? Has anyone ran into a similar problem or could shed some light on a resolution to this issue? In testing, if I use the threadpool. setmaxthreads function and give it a value of 100 (to match the default Sql connection pooling count) then all runs just fine, but much to slow to process this much data.
[Code]

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The Type Initializer For 'System.Data.SqlClient.SqlConnection' Threw An Exception

May 4, 2007

Is there something wrong with my connection string that I would get this exception thrown back at me from my code? I have the string saved in the code and when I try to create an SqlConnection I get the exception above thrown and below is my connection string which is actually the address to my DB file.

Connection = "Data Source=.SQLEXPRESS;AttachDbFilename= C:Documents and SettingsTTTMy DocumentsBASEO.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"

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