SqlTransaction.Commit 方法

定義

認可資料庫交易。Commits the database transaction.

public:
 virtual void Commit();
public void Commit ();
abstract member Commit : unit -> unit
override this.Commit : unit -> unit
Public Sub Commit ()

實作

例外狀況

嘗試認可交易時發生錯誤。An error occurred while trying to commit the transaction.

已認可或復原交易。The transaction has already been committed or rolled back.

-或--or-

連線已中斷。The connection is broken.

範例

下列範例會建立SqlConnection SqlTransaction和。The following example creates a SqlConnection and a SqlTransaction. 它也會示範如何使用CommitBeginTransactionRollback方法。It also demonstrates how to use the Commit, BeginTransaction, and Rollback methods. 發生任何錯誤時,就會回復交易。The transaction is rolled back on any error. Try/Catch當嘗試認可或回復交易時,會使用錯誤處理來處理任何錯誤。Try/Catch error handling is used to handle any errors when attempting to commit or roll back the transaction.

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

備註

Commit方法相當於 transact-sql COMMIT TRANSACTION 語句。The Commit method is equivalent to the Transact-SQL COMMIT TRANSACTION statement. 一旦交易認可之後,您就無法回復它,因為所有修改都已成為資料庫的永久部分。You cannot roll back a transaction once it has been committed, because all modifications have become a permanent part of the database. 如需詳細資訊,請參閱COMMIT TRANSACTION (transact-sql) For more information, see COMMIT TRANSACTION (Transact-SQL) .

注意

Try/Catch認可或SqlTransaction回復時,一律會使用例外狀況處理。Try/Catch exception handling should always be used when committing or rolling back a SqlTransaction. 當連接Rollback被終止,或交易已在伺服器上回複時,和都會產生。Commit InvalidOperationExceptionBoth Commit and Rollback generates an InvalidOperationException if the connection is terminated or if the transaction has already been rolled back on the server.

如需 SQL Server 交易的詳細資訊,請參閱交易(transact-sql)For more information on SQL Server transactions, see Transactions (Transact-SQL).

適用於

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