.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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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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Nov 12, 2009
Does calling the Dispose method on a Windows.Forms.Timer call it's Stop method? Or should I stop the timer before I dispose it?
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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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Feb 3, 2009
I created a VB.NET web application project. Recently I got the dreaded above error message when a certain amount of web pages have loaded. On a form1_Load event, I do this:
vb Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles form1.Load
MyConnection = New SqlConnection
MyConnection.ConnectionString = CONN_STRING
MyConnection.Open()
[Code]...
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Jun 1, 2012
We have a VB.net application using both ADO.net and ADODB connections(both connecting to MS SQl server) Whenever an ADO.net connection throws an expection, we cleared the pools Now if any ADO.connection reopened and everything works fine Is there any way to clear pools for ADODB connection?
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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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Feb 19, 2008
"Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool.his may have occured because all pooled connections were in use and max pool size was reached."I am googling and find out the answer to it is increase my connection pool size from to 100 or so.
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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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Mar 28, 2012
I am indifferent if you are a VB.NET or C# or other .NET developer. I have a FACTORY class like the following:
[Code]...
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Jan 28, 2009
When is it appropriate to apply the dispose method to controls?For example in a form that has five group boxes, once the first group box is used to gather user entries and is no longer needed, is it worth it to apply the dispose method to the first group box? Is it needed for local variables, for example a StringBuilder used within a private function which is only used while the function is executing?
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Jan 7, 2010
I was experimenting with ways to get rid of some memory leaks within my application the other day when I realized that I know virtually nothing about cleaning up my resources. I did some research, and hoped that just calling the .dispose() would solve all of my problems. We have a table in our database that contains about 65,000 records. Obviously when I fill my dataset from the dataadapter, the memory usage can get pretty high. When I called the dispose method on the dataset, I was surprised to find out that NONE of the memory got released.
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Feb 7, 2012
I have Overloaded the Dispose method of System.Windows.Forms.Form Class in which I have written some extra code which I need to execute when object of Form Disposes. But when I create the object of Form in 'Using' statement, the 'End Using, statement do not execute my overloaded Dispose method. What should I do?
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Feb 17, 2010
Is there any sense to set custom object to null(Nothing in VB.NET) in the Dispose() method?Could this prevent memory leaks or it's useless?!Let's consider two examples:
public class Foo : IDisposable
{
private Bar bar; // standard custom .NET object
public Foo(Bar bar) {
[code]....
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Jun 22, 2011
I have a class that has a destructor and a Dispose method (I also inherit IDisposable). Why is it that the only time my destructor gets called is when I call GC.Collect()?
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Oct 14, 2009
I have 2 question, hope somebody give me an explanation: 1. Should a local variable call dispose method and set to nothing? 2. If some method have an arguments which it is a ByVal argument, it means a method create a new object? But If it is a ByRef argument, it means a method don't create a new object?
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Sep 12, 2011
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
Try
[code].....
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Jul 17, 2009
"Time Out expired.The time out elapsed prior to obtaining a connection from the pool .This have occurred because all pooled connections were in use and max pool size was reached"
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Jun 25, 2012
I looked at the Dispose() method in System.Data.SqlClient.SqlTransaction (using a decompiler):
[Code]....
Why does everyone say in forums that it is Rolling back in the dispose? Where does it rollback?
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Jul 29, 2008
At my workplace I have been developing a server/client application which receives on port 8000 and sends on 8001. We do not have any other applications that use these ports, but we do have an application that accesses an SQL database in which part data is stored.
When I am doing testing on the application, if the server were to crash while the client app was sending a packet, could this lost packet cause issues with the network at all?I ask because for some reason we have been receiving connection timeout errors from the application that stores our product data, but we haven't made any changes or started running any new jobs on the network that I am aware of.
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Nov 23, 2010
Was a new project. Most questions can be answered with a little self research. Runs in the back ground; Registered key ALT-Q This was used since it does not directly interfere inside visual studio.
[Code]....
My next version plans to move from using a textfile saved data to XML. Maybe Only activate(hotkey) if VS opens...
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Apr 26, 2010
I have a script returns a string:
[URL]
PHP script:
$data = $_GET['q'];
$query = "SELECT * FROM `table` WHERE ID = '$data'";
$result = mysql_query($query);
[Code].....
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May 24, 2010
I'm learning VB.NET on Visual Studio 2010. What approach should I be taking to connect my project to an SQL Express database?
I see lots of different buzzwords - ADO.NET, LINQ, ADO Entity Framework. Which is most relevant or is it dependant on what I wish to achieve?
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Aug 26, 2009
I have a utility class that creates & returns a db connection:
Public Shared Function GetConnection() as OracleConnection
dim c as New OracleConnection()
... set connection string...
c.Open()
Return c
End Function
Is there any risk of concurrent calls returning the same connection? The connection string enables pooling.
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Feb 21, 2011
How can i make http Connection in vb.net? what is the method call used?
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Dec 7, 2010
I just bought the MCTS Self-Paced Training Kit (Exam 70-561): Microsoft.NET Framework 3.5 - ADO.NET Application Development, and am trying to do the Lab Exercises now. Allready at the first exercise (point 8), where I am supposed to make an "UNIT TEST",[code]
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Mar 8, 2009
I have a code that basically grab data from a file, split into array and use a FOR loop to input data into a different file. I want to use thread pool to create multiple threads to do a specific task. For example for the array() I want a thread to read the first item in a array and perform the task, a second thread reads the second item and perform the task, a third thread reads the third item and perform the task, etc. How would I add thread pool to something like:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim data As String
[code]....
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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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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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Jul 20, 2011
I am confused about something and I hope someone here can give me an answer
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