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OleDbConnection.Open Method

Opens a database connection with the property settings specified by the ConnectionString.

Namespace: System.Data.OleDb
Assembly: System.Data (in system.data.dll)

public override void Open ()
public void Open ()
public override function Open ()
Not applicable.

Exception typeCondition

InvalidOperationException

The connection is already open.

OleDbException

A connection-level error occurred while opening the connection.

The OleDbConnection draws an open connection from the connection pool if one is available. Otherwise, it establishes a new connection to the data source. You can open more than one DataReader on a single OleDbConnection. If the OLEDB provider you use does not support more than one active DataReader on a single connection, the OLEDB provider implicitly opens an additional connection for each.

NoteNote:

If the OleDbConnection goes out of scope, it is not closed. Therefore, you must explicitly close the connection by calling Close or Dispose, or using the connection within a Using statement.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0
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