SqlTransaction.Commit 方法

定義

命名空間:

Microsoft.Data.SqlClient

組件:

Microsoft.Data.SqlClient.dll

套件:

Microsoft.Data.SqlClient v5.2.0

認可資料庫交易。

public:
 override void Commit();

public override void Commit ();

override this.Commit : unit -> unit

Public Overrides Sub Commit ()

例外狀況

Exception

嘗試認可交易時發生錯誤。

InvalidOperationException

已認可或復原交易。

-或-

連線已中斷。

範例

下列範例會 SqlConnection 建立 和 SqlTransaction 。 它也示範如何使用 Commit 、 BeginTransaction 和 Rollback 方法。 交易會在任何錯誤時回復。 Try/Catch 錯誤處理可用來處理嘗試認可或回復交易時的任何錯誤。

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);
                    }
                }
            }
        }
    }
}

備註

方法 Commit 相當於 Transact-SQL COMMIT TRANSACTION 語句。 一旦認可交易之後，您無法復原交易，因為所有修改都已成為資料庫的永久部分。 如需詳細資訊，請參閱 COMMIT TRANSACTION (Transact-SQL) 。

注意

Try/Catch 認可或回復 SqlTransaction 時，應該一律使用例外狀況處理。 Commit如果連接已終止，或交易已在伺服器上復原，則 和 Rollback 都會產生 InvalidOperationException 。

如需SQL Server交易的詳細資訊，請參閱Transact-SQL (交易) 。