OdbcTransaction Class

Definition

Namespace:

System.Data.Odbc

Assembly:

System.Data.Odbc.dll

Package:

System.Data.Odbc v9.0.0-rc.2.24473.5

Source:

OdbcTransaction.cs

Represents an SQL transaction to be made at a data source. This class cannot be inherited.

public ref class OdbcTransaction sealed : System::Data::Common::DbTransaction

public sealed class OdbcTransaction : System.Data.Common.DbTransaction

type OdbcTransaction = class
    inherit DbTransaction

Public NotInheritable Class OdbcTransaction
Inherits DbTransaction

Inheritance

Object

DbTransaction

OdbcTransaction

Examples

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

public static void ExecuteTransaction(string connectionString)
{
    using (OdbcConnection connection =
               new OdbcConnection(connectionString))
    {
        OdbcCommand command = new OdbcCommand();
        OdbcTransaction transaction = null;

        // Set the Connection to the new OdbcConnection.
        command.Connection = connection;

        // Open the connection and execute the transaction.
        try
        {
            connection.Open();

            // Start a local transaction
            transaction = connection.BeginTransaction();

            // Assign transaction object for a pending local transaction.
            command.Connection = connection;
            command.Transaction = transaction;

            // Execute the commands.
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            try
            {
                // Attempt to roll back the transaction.
                transaction.Rollback();
            }
            catch
            {
                // Do nothing here; transaction is not active.
            }
        }
        // The connection is automatically closed when the
        // code exits the using block.
    }
}

Public Sub ExecuteTransaction(ByVal connectionString As String)

    Using connection As New OdbcConnection(connectionString)
        Dim command As New OdbcCommand()
        Dim transaction As OdbcTransaction

        ' Set the Connection to the new OdbcConnection.
        command.Connection = connection

        ' Open the connection and execute the transaction.
        Try
            connection.Open()

            ' Start a local transaction.
            transaction = connection.BeginTransaction()

            ' Assign transaction object for a pending local transaction.
            command.Connection = connection
            command.Transaction = transaction

            ' Execute the commands.
            command.CommandText = _
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
            command.ExecuteNonQuery()

            ' Commit the transaction.
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")

        Catch ex As Exception
            Console.WriteLine(ex.Message)
            ' Try to rollback the transaction
            Try
                transaction.Rollback()

            Catch
                ' Do nothing here; transaction is not active.
            End Try
        End Try
        ' The connection is automatically closed when the
        ' code exits the Using block.
    End Using
End Sub

Remarks

The application creates an OdbcTransaction object by calling BeginTransaction on the OdbcConnection object. All subsequent operations associated with the transaction (for example, committing or aborting the transaction) are performed on the OdbcTransaction object.

Properties

Connection	Gets the OdbcConnection object associated with the transaction, or null if the transaction is no longer valid.
DbConnection	When overridden in a derived class, gets the DbConnection object associated with the transaction. (Inherited from DbTransaction)
IsolationLevel	Specifies the IsolationLevel for this transaction.
SupportsSavepoints	Gets a value that indicates whether this DbTransaction instance supports database savepoints. If false, the methods SaveAsync(String, CancellationToken), RollbackAsync(String, CancellationToken) and ReleaseAsync(String, CancellationToken) as well as their synchronous counterparts are expected to throw NotSupportedException. (Inherited from DbTransaction)

Methods

Commit()	Commits the database transaction.
CommitAsync(CancellationToken)	Asynchronously commits the database transaction. (Inherited from DbTransaction)
Dispose()	Releases the unmanaged resources used by the DbTransaction. (Inherited from DbTransaction)
Dispose(Boolean)	Releases the unmanaged resources used by the DbTransaction and optionally releases the managed resources. (Inherited from DbTransaction)
DisposeAsync()	Asynchronously diposes the transaction object. (Inherited from DbTransaction)
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
Release(String)	Destroys a savepoint previously defined in the current transaction. This allows the system to reclaim some resources before the transaction ends. (Inherited from DbTransaction)
ReleaseAsync(String, CancellationToken)	Destroys a savepoint previously defined in the current transaction. This allows the system to reclaim some resources before the transaction ends. (Inherited from DbTransaction)
Rollback()	Rolls back a transaction from a pending state.
Rollback(String)	Rolls back all commands that were executed after the specified savepoint was established. (Inherited from DbTransaction)
RollbackAsync(CancellationToken)	Asynchronously rolls back a transaction from a pending state. (Inherited from DbTransaction)
RollbackAsync(String, CancellationToken)	Rolls back all commands that were executed after the specified savepoint was established. (Inherited from DbTransaction)
Save(String)	Creates a savepoint in the transaction. This allows all commands that are executed after the savepoint was established to be rolled back, restoring the transaction state to what it was at the time of the savepoint. (Inherited from DbTransaction)
SaveAsync(String, CancellationToken)	Creates a savepoint in the transaction. This allows all commands that are executed after the savepoint was established to be rolled back, restoring the transaction state to what it was at the time of the savepoint. (Inherited from DbTransaction)
ToString()	Returns a string that represents the current object. (Inherited from Object)

See also

• OdbcDataAdapter
• OdbcConnection
• Performing Transactions