Activity Class (System.Activities)

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.NET Framework Class Library

Activity Class

An abstract base class used to create composite activities from pre-existing Activity objects.

Inheritance Hierarchy

System.Object
  System.Activities.Activity
    System.Activities.ActivityWithResult
    System.Activities.AsyncCodeActivity
    System.Activities.CodeActivity
    System.Activities.DynamicActivity
    System.Activities.NativeActivity
    System.ServiceModel.Activities.Receive
    System.ServiceModel.Activities.ReceiveReply
    System.ServiceModel.Activities.Send
    System.ServiceModel.Activities.SendReply

Namespace: System.Activities
Assembly: System.Activities (in System.Activities.dll)

Syntax

Visual Basic

<ContentPropertyAttribute("Implementation")> _
Public MustInherit Class Activity

[ContentPropertyAttribute("Implementation")]
public abstract class Activity

Visual C++

[ContentPropertyAttribute(L"Implementation")]
public ref class Activity abstract

[<AbstractClass>]
[<ContentPropertyAttribute("Implementation")>]
type Activity =  class end

The Activity type exposes the following members.

Constructors

	Name	Description
	Activity	When implemented in a derived class, creates a new instance of the derived class.

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Properties

	Name	Description
	CacheId	Gets the identifier of the cache that is unique within the scope of the workflow definition.
	Constraints	Gets a collection of Constraint activities that can be configured to provide validation for the Activity.
	DisplayName	Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking.
	Id	Gets an identifier that is unique in the scope of the workflow definition.
	Implementation	Gets or sets the delegate that returns an Activity that contains the execution logic.

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Methods

	Name	Description
	CacheMetadata	Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	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	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ShouldSerializeDisplayName	Indicates whether the DisplayName property should be serialized.
	ToString	Returns a String that contains the Id and DisplayName of the Activity. (Overrides Object.ToString().)

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Remarks

Activity is the base class in the activity type hierarchy. All other activity types such as CodeActivity, NativeActivity, AsyncCodeActivity, DynamicActivity, and ActivityWithResult derive from this class.

Examples

The following example shows a simple implementation of an Activity derived class.

Version Information

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Platforms

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.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Reference

System.Activities Namespace

Community Content

jeremiahAdams

Problem in WPF Browser Application

*removed* Questions about usage belong in the forums.

Papy Normand

Example missing ?

I have read
"Examples

The following example shows a simple implementation of an Activity derived class"

But no example nor a link towards an example.
I am supposing that the link has been forgotten