BeginTransaction Method (IsolationLevel)
Collapse the table of content
Expand the table of content

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)

Public Function BeginTransaction (
	il As IsolationLevel
) As OracleTransaction

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.

Exception Condition
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

.NET Framework
Available since 1.1
Return to top
Show:
© 2016 Microsoft