SqlTransaction.Commit Method

public:
 override void Commit();

public override void Commit ();

override this.Commit : unit -> unit

Public Overrides Sub Commit ()

Exceptions

Examples

The following example creates a SqlConnection and a SqlTransaction. It also demonstrates how to use the Commit, BeginTransaction, and Rollback methods. The transaction is rolled back on any error. Try/Catch error handling is used to handle any errors when attempting to commit or roll back the transaction.

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);
                    }
                }
            }
        }
    }
}

Remarks

The Commit method is equivalent to the Transact-SQL COMMIT TRANSACTION statement. You cannot roll back a transaction once it has been committed, because all modifications have become a permanent part of the database. For more information, see COMMIT TRANSACTION (Transact-SQL).

For more information on SQL Server transactions, see Transactions (Transact-SQL).

Applies to