SqlTransaction Class

Definition

public ref class SqlTransaction sealed : System::Data::Common::DbTransaction

public ref class SqlTransaction sealed : MarshalByRefObject, IDisposable, System::Data::IDbTransaction

public sealed class SqlTransaction : System.Data.Common.DbTransaction

[System.Obsolete("Use the Microsoft.Data.SqlClient package instead.")]
public sealed class SqlTransaction : System.Data.Common.DbTransaction

public sealed class SqlTransaction : MarshalByRefObject, IDisposable, System.Data.IDbTransaction

type SqlTransaction = class
    inherit DbTransaction

[<System.Obsolete("Use the Microsoft.Data.SqlClient package instead.")>]
type SqlTransaction = class
    inherit DbTransaction

type SqlTransaction = class
    inherit MarshalByRefObject
    interface IDbTransaction
    interface IDisposable

Public NotInheritable Class SqlTransaction
Inherits DbTransaction

Public NotInheritable Class SqlTransaction
Inherits MarshalByRefObject
Implements IDbTransaction, IDisposable

Inheritance

Object

DbTransaction

SqlTransaction

Inheritance

Object

MarshalByRefObject

DbTransaction

SqlTransaction

Inheritance

Object

MarshalByRefObject

SqlTransaction

Attributes

ObsoleteAttribute

Implements

IDbTransaction IDisposable

Examples

The following example creates a SqlConnection and a SqlTransaction. It also demonstrates how to use the BeginTransaction, Commit, and Rollback methods. The transaction is rolled back on any error, or if it is disposed without first being committed. 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))
    {
        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);
            }
        }
    }
}

Private Sub ExecuteSqlTransaction(ByVal connectionString As String)
    Using connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As SqlCommand = connection.CreateCommand()
        Dim transaction As SqlTransaction

        ' 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 ex As Exception
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType())
            Console.WriteLine("  Message: {0}", ex.Message)

            ' Attempt to roll back the transaction.
            Try
                transaction.Rollback()

            Catch ex2 As Exception
                ' 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)
            End Try
        End Try
    End Using
End Sub

Remarks

The application creates a SqlTransaction object by calling BeginTransaction on the SqlConnection object. All subsequent operations associated with the transaction (for example, committing or aborting the transaction), are performed on the SqlTransaction object.

For more information on SQL Server transactions, see Explicit Transactions and Coding Efficient Transactions.

Properties

Methods

Explicit Interface Implementations

Applies to

See also

• Local Transactions
• ADO.NET Overview