SqlTransaction.Commit 方法

定义

命名空间:

Microsoft.Data.SqlClient

程序集:

Microsoft.Data.SqlClient.dll

包:

Microsoft.Data.SqlClient v5.2.0

提交数据库事务。

public:
 override void Commit();

public override void Commit ();

override this.Commit : unit -> unit

Public Overrides Sub Commit ()

例外

Exception

在尝试提交事务时出错。

InvalidOperationException

已提交或回滚事务。

- 或 -

连接已断开。

示例

以下示例创建 SqlConnection 和 SqlTransaction。 它还演示如何使用 Commit、 BeginTransaction和 Rollback 方法。 事务在任何错误时都回滚。 Try/Catch 错误处理用于在尝试提交或回滚事务时处理任何错误。

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);
                    }
                }
            }
        }
    }
}

注解

方法 Commit 等效于 Transact-SQL COMMIT TRANSACTION 语句。 提交事务后，无法回滚该事务，因为所有修改都已成为数据库的永久部分。 有关详细信息，请参阅 COMMIT TRANSACTION (Transact-SQL) 。

注意

Try/Catch 提交或回滚 SqlTransaction时，应始终使用异常处理。 如果连接终止或事务已在服务器上回滚，则 和 Rollback 都会Commit生成 InvalidOperationException 。

有关SQL Server事务的详细信息，请参阅事务 (Transact-SQL) 。