Delay Class (System.Activities.Statements)

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Lightweight
ScriptFree
.NET Framework Class Library
Delay Class

Creates a timer for a specified duration, using a TimerExtension.

Inheritance Hierarchy
System.Object
  System.Activities.Activity
    System.Activities.NativeActivity
      System.Activities.Statements.Delay

Namespace:  System.Activities.Statements
Assembly:  System.Activities (in System.Activities.dll)
Syntax
Visual Basic
<ContentPropertyAttribute("Duration")> _
Public NotInheritable Class Delay _
	Inherits NativeActivity
C#
[ContentPropertyAttribute("Duration")]
public sealed class Delay : NativeActivity
Visual C++
[ContentPropertyAttribute(L"Duration")]
public ref class Delay sealed : public NativeActivity
F#
[<Sealed>]
[<ContentPropertyAttribute("Duration")>]
type Delay =  
    class
        inherit NativeActivity
    end

The Delay type exposes the following members.

Constructors
  Name Description
Public method Delay Creates a new instance of the Delay activity.
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Properties
  Name Description
Protected property CacheId Gets the identifier of the cache that is unique within the scope of the workflow definition. (Inherited from Activity.)
Protected property CanInduceIdle Gets or sets a value that indicates whether the activity can cause the workflow to become idle. (Inherited from NativeActivity.)
Protected property Constraints Gets a collection of Constraint activities that can be configured to provide validation for the Activity. (Inherited from Activity.)
Public property DisplayName Gets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from Activity.)
Public property Duration The duration of the timer that the Delay activity creates.
Public property Id Gets an identifier that is unique in the scope of the workflow definition. (Inherited from Activity.)
Protected property Implementation The execution logic of the activity. (Inherited from NativeActivity.)
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Methods
  Name Description
Protected method Abort When implemented in a derived class, takes actions in response to the activity being aborted. (Inherited from NativeActivity.)
Protected method CacheMetadata(ActivityMetadata) Not implemented. Use the CacheMetadata(NativeActivityMetadata) method instead. (Inherited from NativeActivity.)
Protected method CacheMetadata(NativeActivityMetadata) Creates and validates a description of the activity’s arguments, variables, child activities, and activity delegates. (Inherited from NativeActivity.)
Protected method Cancel When implemented in a derived class, runs logic to cause graceful early completion of the activity. (Inherited from NativeActivity.)
Public method Equals(Object) Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Execute When implemented in a derived class, runs the activity’s execution logic. (Inherited from NativeActivity.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ShouldSerializeDisplayName Indicates whether the DisplayName property should be serialized. (Inherited from Activity.)
Public method ToString Returns a String that contains the Id and DisplayName of the Activity. (Inherited from Activity.)
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Remarks

When the activity’s timer expires, the Delay activity completes its execution. If a workflow instance persists while a Delay activity has an outstanding timer, then an ITimerExpiredNotification standard endpoint must be configured to receive notification that the timer has expired.

Examples

The following code sample demonstrates creating a Delay activity. This example is from the Using the Pick Activity sample.

C#

static Activity CreateWF()
{
    Variable<string> name = new Variable<string>();
    Sequence body = new Sequence
    {
        Variables = { name },
        Activities = 
        {
            new WriteLine { Text = "What is your name? (You have 5 seconds to answer)" },
            new Pick
            {
               Branches = 
               {
                   new PickBranch
                    {
                       Trigger = new ReadString
                       {
                           Result = name,
                           BookmarkName = bookmarkName
                       },
                       Action = new WriteLine 
                       { 
                           Text = new InArgument<string>(env => "Hello " + name.Get(env)) 
                       }
                   },
                   new PickBranch
                    {
                       Trigger = new Delay
                       {
                           Duration = TimeSpan.FromSeconds(5)
                       },
                       Action = new WriteLine
                       {
                           Text = "Time is up."
                       }
                   }
               }
           }
       }
    };

    return body;
}
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.
See Also

Reference

System.Activities.Statements Namespace