CorrelationAliasAttribute Class
Overrides the correlation parameter value when the correlation value must be obtained from a parameter other than that indicated by the CorrelationParameterAttribute. This class cannot be inherited.
Assembly: System.Workflow.Activities (in System.Workflow.Activities.dll)
The CorrelationAliasAttribute type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | CorrelationAliasAttribute | Initializes a new instance of the CorrelationAliasAttribute with the name of the correlation that is being aliased and the path to where the value can be found. |
| Name | Description | |
|---|---|---|
![]() | Equals | Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | 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 | 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.) |
| Name | Description | |
|---|---|---|
![]() ![]() | _Attribute::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfo | Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.) |
![]() ![]() | _Attribute::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.) |
![]() ![]() | _Attribute::Invoke | Provides access to properties and methods exposed by an object. (Inherited from Attribute.) |
To match an incoming message with the appropriate workflow instance, the message and the workflow instance must share a key. This key is called a correlation set. Typically, the key can be a single-valued correlation set. This means that an ID field in the message can be matched against an ID of the same type that is held by schedule instances.
The CorrelationAliasAttribute is applied to a method or an event on an interface on a data exchange interface.
The following code example shows how to use a CorrelationAliasAttribute to override a CorrelationParameterAttribute. This code example is from the CorrelatedLocalService SDK sample. For more information, seeCorrelated Local Service Sample.
[ExternalDataExchange] [CorrelationParameter("taskId")] public interface ITaskService2 { [CorrelationInitializer] void CreateTask(string taskId, string assignee, string text); [CorrelationAlias("taskId", "e.Id")] event EventHandler<TaskEventArgs> TaskCompleted; }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
