TransactionAttribute 类

定义

指定可用于特性化对象的事务的类型。Specifies the type of transaction that is available to the attributed object. 允许值是 TransactionOption 枚举的成员。Permissible values are members of the TransactionOption enumeration.

public ref class TransactionAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Class, Inherited=true)]
[System.Runtime.InteropServices.ComVisible(false)]
public sealed class TransactionAttribute : Attribute
type TransactionAttribute = class
    inherit Attribute
Public NotInheritable Class TransactionAttribute
Inherits Attribute
继承
TransactionAttribute
属性

示例

下面的代码示例演示TransactionAttribute如何使用将ServicedComponent标记为事务性。The following code example demonstrates the use of the TransactionAttribute to mark a ServicedComponent as transactional.


[assembly:System::Reflection::AssemblyKeyFile("Transaction.snk")];
[Transaction]
public ref class TransactionalComponent: public ServicedComponent
{
public:
   void TransactionalMethod( String^ data )
   {
      ContextUtil::DeactivateOnReturn = true;
      ContextUtil::MyTransactionVote = TransactionVote::Abort;
      
      // do work with data
      ContextUtil::MyTransactionVote = TransactionVote::Commit;
   }

};

[Transaction]
public class TransactionalComponent : ServicedComponent
{

    public void TransactionalMethod (string data)
    {

      ContextUtil.DeactivateOnReturn = true;
      ContextUtil.MyTransactionVote = TransactionVote.Abort;

      // Do work with data. Return if any errors occur.

      // Vote to commit. If any errors occur, this code will not execute.
      ContextUtil.MyTransactionVote = TransactionVote.Commit;
    }
}
<Transaction()>  _
Public Class TransactionalComponent
    Inherits ServicedComponent
    
    
    Public Sub TransactionalMethod(ByVal data As String) 
        
        ContextUtil.DeactivateOnReturn = True
        ContextUtil.MyTransactionVote = TransactionVote.Abort
        
        ' Do work with data. Return if any errors occur.
        ' Vote to commit. If any errors occur, this code will not execute.
        ContextUtil.MyTransactionVote = TransactionVote.Commit
    
    End Sub
End Class

注解

如果使用此属性指定了事务类型, 则不能在 COM + 目录中更改它。If a transaction type is specified with this attribute, it must not be changed in the COM+ catalog. 如果在 COM + 目录中更改了事务类型, 则必须在具有此属性的组件上指定相同的事务类型。If the transaction type is changed in the COM+ catalog, the same transaction type must be specified on the component with this attribute.

有关使用特性的详细信息, 请参阅特性For more information about using attributes, see Attributes.

构造函数

TransactionAttribute()

初始化 TransactionAttribute 类的新实例,并且将组件的请求的事务类型设置为 RequiredInitializes a new instance of the TransactionAttribute class, setting the component's requested transaction type to Required.

TransactionAttribute(TransactionOption)

初始化 TransactionAttribute 类的新实例,并且指定事务类型。Initializes a new instance of the TransactionAttribute class, specifying the transaction type.

属性

Isolation

获取或设置事务隔离级别。Gets or sets the transaction isolation level.

Timeout

获取或设置该事务的超时。Gets or sets the time-out for this transaction.

TypeId

在派生类中实现时,获取此 Attribute 的唯一标识符。When implemented in a derived class, gets a unique identifier for this Attribute.

(继承自 Attribute)
Value

获取事务的 TransactionOption 值,并且可以选择禁用事务服务。Gets the TransactionOption value for the transaction, optionally disabling the transaction service.

方法

Equals(Object)

返回一个值,该值指示此实例是否与指定的对象相等。Returns a value that indicates whether this instance is equal to a specified object.

(继承自 Attribute)
GetHashCode()

返回此实例的哈希代码。Returns the hash code for this instance.

(继承自 Attribute)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
IsDefaultAttribute()

在派生类中重写时,指示此实例的值是否是派生类的默认值。When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(继承自 Attribute)
Match(Object)

当在派生类中重写时,返回一个指示此实例是否等于指定对象的值。When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(继承自 Attribute)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)

显式接口实现

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

将一组名称映射为对应的一组调度标识符。Maps a set of names to a corresponding set of dispatch identifiers.

(继承自 Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

检索对象的类型信息,然后可以使用该信息获取接口的类型信息。Retrieves the type information for an object, which can be used to get the type information for an interface.

(继承自 Attribute)
_Attribute.GetTypeInfoCount(UInt32)

检索对象提供的类型信息接口的数量(0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(继承自 Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

提供对某一对象公开的属性和方法的访问。Provides access to properties and methods exposed by an object.

(继承自 Attribute)

适用于