IDbTransaction.Rollback 메서드

정의

보류 상태에서 트랜잭션을 롤백합니다.Rolls back a transaction from a pending state.

public:
 void Rollback();
public void Rollback ();
abstract member Rollback : unit -> unit
Public Sub Rollback ()

예외

트랜잭션을 커밋하는 동안 오류가 발생한 경우An error occurred while trying to commit the transaction.

트랜잭션이 이미 커밋 또는 롤백된 경우The transaction has already been committed or rolled back.

또는-or-

연결이 손상된 경우The connection is broken.

예제

다음 예제에서는 파생된 클래스의 인스턴스를 만듭니다 SqlConnectionSqlTransaction합니다.The following example creates instances of the derived classes, SqlConnection and a SqlTransaction. 사용 하는 방법을 보여 줍니다 합니다 BeginTransaction, Commit, 및 Rollback 메서드.It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods.

private static void ExecuteSqlTransaction(string connectionString)
{
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();

        SqlCommand command = connection.CreateCommand();
        SqlTransaction transaction;

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

        // Must assign both transaction object and connection
        // to Command object for a pending local transaction
        command.Connection = connection;
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Attempt to commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType());
            Console.WriteLine("  Message: {0}", ex.Message);

            // Attempt to roll back the transaction.
            try
            {
                transaction.Rollback();
            }
            catch (Exception ex2)
            {
                // This catch block will handle any errors that may have occurred
                // on the server that would cause the rollback to fail, such as
                // a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType());
                Console.WriteLine("  Message: {0}", ex2.Message);
            }
        }
    }
}
Private Sub ExecuteSqlTransaction(ByVal connectionString As String)
    Using connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As SqlCommand = connection.CreateCommand()
        Dim transaction As SqlTransaction

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

        ' Must assign both transaction object and connection
        ' to Command object for a pending local transaction.
        command.Connection = connection
        command.Transaction = transaction

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

            command.ExecuteNonQuery()

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

        Catch ex As Exception
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType())
            Console.WriteLine("  Message: {0}", ex.Message)

            ' Attempt to roll back the transaction.
            Try
                transaction.Rollback()

            Catch ex2 As Exception
                ' This catch block will handle any errors that may have occurred
                ' on the server that would cause the rollback to fail, such as
                ' a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType())
                Console.WriteLine("  Message: {0}", ex2.Message)
            End Try
        End Try
    End Using
End Sub

설명

트랜잭션이 롤백할 수 보류 상태에서 (후 BeginTransaction 가 호출 된 전에 Commit 라고).The transaction can only be rolled back from a pending state (after BeginTransaction has been called, but before Commit is called).

구현자 참고

재정의 하는 경우 Rollback() 파생된 클래스에서 호출 해야 기본 클래스의 Rollback 메서드.When overriding Rollback() in a derived class, be sure to call the base class's Rollback method.

적용 대상

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