ADO.NET :: Open And Close Connection?

Mar 23, 2011

When should i open and close the database connection.and which are best data classes (for e.g dataset, datatable etc) should i use when connection is open or close.

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DataSource Controls :: Open / Close Connection To DB?

May 4, 2010

When I'm using this to open Connection to DB,

Do I need to Close it at the end?

Or by using it, it close by itself?

using (SqlConnection cnn = new SqlConnection(connectionInfo))

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Visual Studio :: Error Unable To Add Data Connection. ExecuteScalar Requires An Open And Available Connection. The Connection's Current State Is Closed?

Sep 13, 2010

I'm using Visual Studio 2008, and my database is SQL Server 2000.

I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.

But when I click OK, I get the error:

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Jun 5, 2010

I previously used a datasource and a connection string to connect to my database on sql server and all orked fine. The connection string was saved in my web.config file and is: ....

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Feb 28, 2011

I have a page where I load a couple of dropdown lists from the database (DB). I do this by calling a general function that connects to the DB and gets the data to the dropdownlist. This means that I can have three queries to the DB while rendering one page.

should I close and dispose the sqlconnection, sqlcommand and sqldatareader at the end of this function?

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WCF / ASMX :: Best Place To Close The Connection

May 9, 2010

we are using WCF web service. My job is to create the client WCF service.

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Performance - Close HTTP Connection In C#?

Mar 30, 2011

Our site was under Slow HTTP POST DOS attack recently. It's when your server receives a lot of incoming connections and keep them for long time because the sender sends information very slow and server cant serve real users' request - denial of service.

So I decied to reject such POST requests:

void Application_BeginRequest(object sender, EventArgs e)
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Dec 17, 2010

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Nov 25, 2010

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Nov 9, 2010

does DbCommand.Dispose() automatially close the database connection?

Here is my code:

Database db = DatabaseFactory.CreateDatabase("DBIS");
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Closing-routine / Close Connection Command After Getting Data From The Database?

Oct 4, 2010

I am using a adapted version of't we need something like a closing-routine / close connection command after getting data from the database?If yes: What is the correct closing command?

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Is It Necessary To Open And Close Connections When Using SqlDataAdapter

Jan 28, 2013

Is this necessary to open and close connection when i am using SqlDataAdapter and DataSet to get data from  from table from  databse in sql server? Which one will be better to use in the following code. Code1 or Code2.

Code: 1 With open and colse connection

public DataSet GetFAcadSlidingImage()
SqlConnection con = GetConnection();
cmd = new SqlCommand("Pro_GetFAcadSlidingImage", con);
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Code:2 Without open and colse connection

public DataSet GetFAcadSlidingImage()
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Aug 18, 2010


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Sep 2, 2010

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1)so is what i have done a bad coding practise?2)will it make the application pool to hang?3)should i remove all open/close from the files?

Dim ds As DataSet = New DataSet
Dim dad As SqlDataAdapter = New SqlDataAdapter(cmd)


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Jan 27, 2010

If I have 5 CollapsiblePanelExtenders on page and I want open second one I want close the first one and then open second one...How??

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I'm using 3 diff websiteA,B.C. Im logging in A and accessing B,then logging out it means B has to close;then the redirection is A.likewise C to B.

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Feb 17, 2011

I deployed my MVC app to IIS 7.0 and I keep getting the following error; ExecuteNonQuery requires an open and available Connection. The connection's current state is closed I dont get this with the app locally on my machine. Where could this error be occurring??

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I am opening a thickbox in aspx page using following line

href="BBBuyResult.aspx?keepThis=true<%=getPassResult()%>&TB_iframe=true&height=600&width=800" title="Buy
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then in server side scripting i need to close this page and redirect parent to some other page i use this code


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