TransactionFlowAttribute Class
Definition
Specifies whether a service operation accepts incoming transactions from a client.
public ref class TransactionFlowAttribute sealed : Attribute, System::ServiceModel::Description::IOperationBehavior
[System.AttributeUsage(System.AttributeTargets.Method)]
public sealed class TransactionFlowAttribute : Attribute, System.ServiceModel.Description.IOperationBehavior
type TransactionFlowAttribute = class
inherit Attribute
interface IOperationBehavior
Public NotInheritable Class TransactionFlowAttribute
Inherits Attribute
Implements IOperationBehavior
- Inheritance
- Attributes
- Implements
Examples
The following code example shows the use of this enumeration together with the TransactionFlowOption class at the operation level.
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."
);
}
}
}
Remarks
The TransactionFlowAttribute is an attribute used declaratively to associate a specific transaction flow policy with a service operation. The TransactionFlowOption property of this attribute specifies whether the respective operation accepts a transaction flowed from the client, or if the operation requires the client to always flow a transaction. The TransactionFlowAttribute can also be used as an operation behavior to programmatically associate a transaction flow policy with a specific operation. In this case, it should be added to the Behaviors
collection on the operation's description.
Note
The OperationContract
for each method that uses the TransactionFlowAttribute must provide a fully-qualified Action
string. A value of "*" is not supported.
Constructors
TransactionFlowAttribute(TransactionFlowOption) |
Initializes a new instance of the TransactionFlowAttribute class. |
Properties
Transactions |
Gets a value that indicates whether the incoming transaction is supported. |
TypeId |
When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute) |
Methods
Equals(Object) |
Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute) |
GetHashCode() |
Returns the hash code for this instance. (Inherited from Attribute) |
GetType() |
Gets the Type of the current instance. (Inherited from Object) |
IsDefaultAttribute() |
When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute) |
Match(Object) |
When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute) |
MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Explicit Interface Implementations
_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute) |
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) |
Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute) |
_Attribute.GetTypeInfoCount(UInt32) |
Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute) |
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
Provides access to properties and methods exposed by an object. (Inherited from Attribute) |
IOperationBehavior.AddBindingParameters(OperationDescription, BindingParameterCollection) |
Adds extra parameters (settings) to the binding context to support this operation's behavior. This method cannot be inherited. |
IOperationBehavior.ApplyClientBehavior(OperationDescription, ClientOperation) |
Attaches the attribute functionality to the |
IOperationBehavior.ApplyDispatchBehavior(OperationDescription, DispatchOperation) |
Attaches the attribute functionality to the DispatchOperation object for the method that the attribute marks. This method cannot be inherited. |
IOperationBehavior.Validate(OperationDescription) |
Verifies that the operation can support this behavior. This method cannot be inherited. |