TransactionFlowAttribute 类

定义

public ref class TransactionFlowAttribute sealed : Attribute, System::ServiceModel::Description::IOperationBehavior

[System.AttributeUsage(System.AttributeTargets.Method)]
public sealed class TransactionFlowAttribute : Attribute, System.ServiceModel.Description.IOperationBehavior

[<System.AttributeUsage(System.AttributeTargets.Method)>]
type TransactionFlowAttribute = class
    inherit Attribute
    interface IOperationBehavior

Public NotInheritable Class TransactionFlowAttribute
Inherits Attribute
Implements IOperationBehavior

继承

Object

Attribute

TransactionFlowAttribute

属性

AttributeUsageAttribute

实现

IOperationBehavior

示例

下面的代码示例演示如何将此枚举与 TransactionFlowOption 操作级别的类一起使用。

using System;  
using System.ServiceModel;  
using System.Transactions;  

namespace Microsoft.WCF.Documentation  
{  
  [ServiceContract(  
    Namespace="http://microsoft.wcf.documentation",   
    SessionMode=SessionMode.Required  
  )]  
  public interface IBehaviorService  
  {  
    [OperationContract]  
    [TransactionFlow(TransactionFlowOption.Mandatory)]  
    string TxWork(string message);  
  }  

  // Note: To use the TransactionIsolationLevel property, you   
  // must add a reference to the System.Transactions.dll assembly.  
  /* The following service implementation:  
   *   -- Processes messages on one thread at a time  
   *   -- Creates one service object per session  
   *   -- Releases the service object when the transaction commits  
   */  
  [ServiceBehavior(  
    ConcurrencyMode=ConcurrencyMode.Single,  
    InstanceContextMode=InstanceContextMode.PerSession,  
    ReleaseServiceInstanceOnTransactionComplete=true  
  )]  
  public class BehaviorService : IBehaviorService, IDisposable  
  {  
    Guid myID;  

    public BehaviorService()  
    {  
      myID = Guid.NewGuid();  
      Console.WriteLine(  
        "Object "  
        + myID.ToString()  
        + " created.");  
    }  

    /*  
    / * The following operation-level behaviors are specified:  
    / * Always executes under a transaction scope.  
    / * The transaction scope is completed when the operation  
    / * terminates without an unhandled exception.  
    /*  
    [OperationBehavior(  
      TransactionAutoComplete = true,  
      TransactionScopeRequired = true  
    )]  
    public string TxWork(string message)  
    {  
      // Do some transactable work.  
      Console.WriteLine("TxWork called with: " + message);  
      // Display transaction information.  

      TransactionInformation info = Transaction.Current.TransactionInformation;  
      Console.WriteLine("The distributed tx ID: {0}.", info.DistributedIdentifier);  
      Console.WriteLine("The tx status: {0}.", info.Status);  
      return String.Format("Hello. This was object {0}.",myID.ToString()) ;  
    }  

    public void Dispose()  
    {  
      Console.WriteLine(  
        "Service "  
        + myID.ToString()  
        + " is being recycled."  
      );  
    }  
  }  
}  

注解

TransactionFlowAttribute这是一个以声明方式用于将特定事务流策略与服务操作关联的属性。 此属性 TransactionFlowOption 的属性指定相应的操作是接受从客户端流动的事务，还是操作要求客户端始终流事务。 TransactionFlowAttribute还可以用作操作行为，以编程方式将事务流策略与特定操作相关联。 在这种情况下，应将其添加到 Behaviors 操作说明的集合中。

另请参阅

• 启用事务流