Click to Rate and Give Feedback
MSDN
MSDN Library
.NET Development
.NET Framework 3.5
DbConnection Class
 Close Method

  Switch on low bandwidth view
This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
DbConnection..::.Close Method

Closes the connection to the database. This is the preferred method of closing any open connection.

Namespace:  System.Data.Common
Assembly:  System.Data (in System.Data.dll)
Visual Basic (Declaration)
Public MustOverride Sub Close
Visual Basic (Usage)
Dim instance As DbConnection

instance.Close()
C#
public abstract void Close()
Visual C++
public:
virtual void Close() abstract
JScript
public abstract function Close()

Implements

IDbConnection..::.Close()()()
ExceptionCondition
DbException

The connection-level error that occurred while opening the connection.

The Close method rolls back any pending transactions. It then releases the connection to the connection pool, or closes the connection if connection pooling is disabled.

An application can call Close more than one time. No exception is generated.

If the DbConnection goes out of scope, it is not closed. Therefore, you must explicitly close the connection by calling Close or Dispose, which are functionally equivalent. If the connection pooling value Pooling is set to true or yes, this also releases the physical connection.

Caution noteCaution:

Do not call Close or Dispose on a Connection, a DataReader, or any other managed object in the Finalize method of your class. In a finalizer, you should only release unmanaged resources that your class owns directly. If your class does not own any unmanaged resources, do not include a Finalize method in your class definition. For more information, see Garbage Collection.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
Tags What's this?: Add a tag
Community Content   What is Community Content?
Add new content RSS  Annotations
Processing
© 2009 Microsoft Corporation. All rights reserved. Terms of Use  |  Trademarks  |  Privacy Statement
Page view tracker