SqlTransaction Klas

Definitie

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

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

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

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

type SqlTransaction = class
    inherit MarshalByRefObject
    interface IDbTransaction
    interface IDisposable

type SqlTransaction = class
    inherit DbTransaction

Public NotInheritable Class SqlTransaction
Inherits MarshalByRefObject
Implements IDbTransaction, IDisposable

Public NotInheritable Class SqlTransaction
Inherits DbTransaction

Overname

Object

MarshalByRefObject

SqlTransaction

Overname

Object

MarshalByRefObject

DbTransaction

SqlTransaction

Implementeringen

IDbTransaction IDisposable

Voorbeelden

In het volgende voorbeeld wordt een SqlConnection en een SqlTransaction. Het laat ook zien hoe u de BeginTransaction, Commiten Rollback methoden gebruikt. De transactie wordt teruggedraaid op een fout of als deze wordt verwijderd zonder eerst te worden doorgevoerd. Try / Catch foutafhandeling wordt gebruikt om eventuele fouten af te handelen bij het doorvoeren of terugdraaien van de transactie.

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

Opmerkingen

De toepassing maakt een SqlTransaction object door het SqlConnection object aan te roepenBeginTransaction. Alle volgende bewerkingen die zijn gekoppeld aan de transactie (bijvoorbeeld het doorvoeren of afbreken van de transactie), worden uitgevoerd op het SqlTransaction object.

Zie Explicit Transactions en Coding Efficient Transactions voor meer informatie over SQL Server transacties.

Zie ook

• Lokale transacties
• overzicht van ADO.NET