TransactionOption Enumeração
Definição
Importante
Algumas informações dizem respeito a um produto pré-lançado que pode ser substancialmente modificado antes de ser lançado. A Microsoft não faz garantias, de forma expressa ou implícita, em relação à informação aqui apresentada.
Especifica o tipo automático de transação solicitado pelo componente.
public enum class TransactionOption[System.Serializable]
public enum TransactionOption[<System.Serializable>]
type TransactionOption = Public Enum TransactionOption- Herança
- Atributos
Campos
| Name | Valor | Description |
|---|---|---|
| Disabled | 0 | Ignora qualquer transação no contexto atual. |
| NotSupported | 1 | Cria o componente num contexto sem transação reguladora. |
| Supported | 2 | Partilha uma transação, se existir. |
| Required | 3 | Partilha uma transação, se existe, e cria uma nova transação se necessário. |
| RequiresNew | 4 | Cria o componente com uma nova transação, independentemente do estado do contexto atual. |
Exemplos
O seguinte exemplo de código demonstra a utilização do TransactionOption tipo.
#using <System.EnterpriseServices.dll>
using namespace System;
using namespace System::EnterpriseServices;
using namespace System::Reflection;
// References:
// System.EnterpriseServices
// An instance of this class will not participate in transactions, but can
// share its caller's context even if its caller is configured as
// NotSupported, Supported, Required, or RequiresNew.
[Transaction(TransactionOption::Disabled)]
public ref class TransactionDisabled : public ServicedComponent
{
};
// An instance of this class will not participate in transactions, and will
// share its caller's context only if its caller is also configured as
// NotSupported.
[Transaction(TransactionOption::NotSupported)]
public ref class TransactionNotSupported : public ServicedComponent
{
};
// An instance of this class will participate in its caller's transaction
// if one exists.
[Transaction(TransactionOption::Supported)]
public ref class TransactionSupported : public ServicedComponent
{
};
// An instance of this class will participate in its caller's transaction
// if one exists. If not, a new transaction will be created for it.
[Transaction(TransactionOption::Required)]
public ref class TransactionRequired : public ServicedComponent
{
};
// A new transaction will always be created for an instance of this class.
[Transaction(TransactionOption::RequiresNew)]
public ref class TransactionRequiresNew : public ServicedComponent
{
};
using System;
using System.EnterpriseServices;
using System.Reflection;
// References:
// System.EnterpriseServices
// An instance of this class will not participate in transactions, but can
// share its caller's context even if its caller is configured as
// NotSupported, Supported, Required, or RequiresNew.
[Transaction(TransactionOption.Disabled)]
public class TransactionAttribute_TransactionDisabled : ServicedComponent
{
}
// An instance of this class will not participate in transactions, and will
// share its caller's context only if its caller is also configured as
// NotSupported.
[Transaction(TransactionOption.NotSupported)]
public class TransactionAttribute_TransactionNotSupported : ServicedComponent
{
}
// An instance of this class will participate in its caller's transaction
// if one exists.
[Transaction(TransactionOption.Supported)]
public class TransactionAttribute_TransactionSupported : ServicedComponent
{
}
// An instance of this class will participate in its caller's transaction
// if one exists. If not, a new transaction will be created for it.
[Transaction(TransactionOption.Required)]
public class TransactionAttribute_TransactionRequired : ServicedComponent
{
}
// A new transaction will always be created for an instance of this class.
[Transaction(TransactionOption.RequiresNew)]
public class TransactionAttribute_TransactionRequiresNew : ServicedComponent
{
}
Imports System.EnterpriseServices
Imports System.Reflection
' References:
' System.EnterpriseServices
' An instance of this class will not participate in transactions, but can
' share its caller's context even if its caller is configured as
' NotSupported, Supported, Required, or RequiresNew.
<Transaction(TransactionOption.Disabled)> _
Public Class TransactionAttribute_TransactionDisabled
Inherits ServicedComponent
End Class
' An instance of this class will not participate in transactions, and will
' share its caller's context only if its caller is also configured as
' NotSupported.
<Transaction(TransactionOption.NotSupported)> _
Public Class TransactionAttribute_TransactionNotSupported
Inherits ServicedComponent
End Class
' An instance of this class will participate in its caller's transaction
' if one exists.
<Transaction(TransactionOption.Supported)> _
Public Class TransactionAttribute_TransactionSupported
Inherits ServicedComponent
End Class
' An instance of this class will participate in its caller's transaction
' if one exists. If not, a new transaction will be created for it.
<Transaction(TransactionOption.Required)> _
Public Class TransactionAttribute_TransactionRequired
Inherits ServicedComponent
End Class
' A new transaction will always be created for an instance of this class.
<Transaction(TransactionOption.RequiresNew)> _
Public Class TransactionAttribute_TransactionRequiresNew
Inherits ServicedComponent
End Class
Observações
Ao usar a Ferramenta de Instalação .NET (Regsvcs.exe), a opção de transação para um ServicedComponent passa por defeito a Disabled.
