SqlTransaction.Commit Metode

Definisi

Ruang nama:

Microsoft.Data.SqlClient

Rakitan:

Microsoft.Data.SqlClient.dll

Paket:

Microsoft.Data.SqlClient v5.2.0

Menerapkan transaksi database.

public:
 override void Commit();

public override void Commit ();

override this.Commit : unit -> unit

Public Overrides Sub Commit ()

Pengecualian

Exception

Terjadi kesalahan saat mencoba melakukan transaksi.

InvalidOperationException

Transaksi telah dilakukan atau digulung balik.

-atau-

Koneksi terputus.

Contoh

Contoh berikut membuat SqlConnection dan SqlTransaction. Ini juga menunjukkan cara menggunakan Commitmetode , , BeginTransactiondan Rollback . Transaksi digulung balik pada kesalahan apa pun. Try/Catch penanganan kesalahan digunakan untuk menangani kesalahan apa pun saat mencoba menerapkan atau mengembalikan transaksi.

using Microsoft.Data.SqlClient;

namespace Transaction1CS
{
    class Program
    {
        static void Main()
        {
            string connectionString =
                "Persist Security Info=False;Integrated Security=SSPI;database=Northwind;server=(local)";
            ExecuteSqlTransaction(connectionString);
            Console.ReadLine();
        }
        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();

                // 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);
                    }
                }
            }
        }
    }
}

Keterangan

Metode Commit ini setara dengan pernyataan TRANSACT-SQL COMMIT TRANSACTION. Anda tidak dapat mengembalikan transaksi setelah dilakukan, karena semua modifikasi telah menjadi bagian permanen dari database. Untuk informasi selengkapnya, lihat COMMIT TRANSACTION (Transact-SQL).

Catatan

Try/Catch penanganan pengecualian harus selalu digunakan saat melakukan atau mengembalikan SqlTransaction. Keduanya Commit dan Rollback menghasilkan InvalidOperationException jika koneksi dihentikan atau jika transaksi telah digulung balik di server.

Untuk informasi selengkapnya tentang transaksi SQL Server, lihat Transaksi (Transact-SQL).