TransactionOption 枚举

指定组件请求的自动事务类型。

**命名空间:**System.EnterpriseServices
**程序集:**System.EnterpriseServices（在 system.enterpriseservices.dll 中）

语法

声明
<SerializableAttribute> _
Public Enumeration TransactionOption
用法
Dim instance As TransactionOption

[SerializableAttribute] 
public enum TransactionOption

[SerializableAttribute] 
public enum class TransactionOption

/** @attribute SerializableAttribute() */ 
public enum TransactionOption

SerializableAttribute 
public enum TransactionOption

成员

	成员名称	说明
	Disabled	忽略当前上下文中的任何事务。
	NotSupported	使用非受控事务在上下文中创建组件。
	Required	如果事务存在，则共享该事务；如有必要，则创建新事务。
	RequiresNew	使用新事务创建组件，而与当前上下文的状态无关。
	Supported	如果事务存在，则共享该事务。

备注

在使用 .NET 安装工具 (Regsvcs.exe) 时，ServicedComponent 的事务选项默认为 Disabled。

示例

下面的代码示例演示如何使用 TransactionOption 类型。

Imports System
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 'TransactionAttribute_TransactionDisabled

' 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 'TransactionAttribute_TransactionNotSupported

' 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 'TransactionAttribute_TransactionSupported

' 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 'TransactionAttribute_TransactionRequired

' A new transaction will always be created for an instance of this class.
<Transaction(TransactionOption.RequiresNew)>  _
Public Class TransactionAttribute_TransactionRequiresNew
    Inherits ServicedComponent
End Class 'TransactionAttribute_TransactionRequiresNew

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
{
}

#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
{
};

import System.*;
import System.EnterpriseServices.*;
import 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.
/** @attribute Transaction(TransactionOption.Disabled)
 */
public class TransactionAttribute_TransactionDisabled extends ServicedComponent
{
} //TransactionAttribute_TransactionDisabled

// 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.
/** @attribute Transaction(TransactionOption.NotSupported)
 */
public class TransactionAttribute_TransactionNotSupported extends 
    ServicedComponent
{
} //TransactionAttribute_TransactionNotSupported

// An instance of this class will participate in its caller's transaction
// if one exists.
/** @attribute Transaction(TransactionOption.Supported)
 */
public class TransactionAttribute_TransactionSupported extends ServicedComponent
{
} //TransactionAttribute_TransactionSupported

// 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.
/** @attribute Transaction(TransactionOption.Required)
 */
public class TransactionAttribute_TransactionRequired extends ServicedComponent
{
} //TransactionAttribute_TransactionRequired

// A new transaction will always be created for an instance of this class.
/** @attribute Transaction(TransactionOption.RequiresNew)
 */
public class TransactionAttribute_TransactionRequiresNew extends 
    ServicedComponent
{
} //TransactionAttribute_TransactionRequiresNew

平台

Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

请参见

参考

System.EnterpriseServices 命名空间