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OracleConnection.BeginTransaction Method (IsolationLevel)

Begins a transaction at the database with the specified IsolationLevel value.

Namespace:  System.Data.OracleClient
Assembly:  System.Data.OracleClient (in System.Data.OracleClient.dll)

'Declaration
Public Function BeginTransaction ( _
	il As IsolationLevel _
) As OracleTransaction
'Usage
Dim instance As OracleConnection 
Dim il As IsolationLevel 
Dim returnValue As OracleTransaction 

returnValue = instance.BeginTransaction(il)

Parameters

il
Type: System.Data.IsolationLevel

The transaction isolation level for this connection.

Return Value

Type: System.Data.OracleClient.OracleTransaction
An object representing the new transaction.

ExceptionCondition
InvalidOperationException

Parallel transactions are not supported.

To commit or roll back the transaction, you must explicitly use the Commit or Rollback methods.

To ensure that the .NET Framework Data Provider for Oracle transaction management model performs correctly, avoid using other transaction management models, such as those provided by the database.

The following example creates an OracleConnection and an OracleTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods.

Public Sub RunOracleTransaction(ByVal connectionString As String)
    Using connection As New OracleConnection(connectionString)
        connection.Open()

        Dim command As OracleCommand = connection.CreateCommand()
        Dim transaction As OracleTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted)
        ' Assign transaction object for a pending local transaction
        command.Transaction = transaction

        Try
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')"
            command.ExecuteNonQuery()
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")
        Catch e As Exception
            transaction.Rollback()
            Console.WriteLine(e.ToString())
            Console.WriteLine("Neither record was written to database.")
        End Try 
    End Using 
End Sub

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

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, 1.1

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