Commit Method
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SqlTransaction.Commit Method

Commits the database transaction.

Namespace:  System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)

public override void Commit()




An error occurred while trying to commit the transaction.


The transaction has already been committed or rolled back.


The connection is broken.

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 SQL Server Books Online.


Try/Catch exception handling should always be used when committing or rolling back a SqlTransaction. Both Commit and Rollback generates an InvalidOperationException if the connection is terminated or if the transaction has already been rolled back on the server.

For more information on SQL Server transactions, see "Explicit Transactions" and "Coding Efficient Transactions" in SQL Server 2005 Books Online.

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.

private static void ExecuteSqlTransaction(string connectionString)
    using (SqlConnection connection = new SqlConnection(connectionString))

        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;

            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";

            // Attempt to commit the transaction.
            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. 
            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);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

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