SetStateEventArgs Class
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SetStateEventArgs Class

Represents a class that is used as an argument to set the state of a StateMachineWorkflowActivity.

System.Object
  System.EventArgs
    System.Workflow.Activities.SetStateEventArgs

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

[SerializableAttribute]
[ComVisibleAttribute(false)]
public class SetStateEventArgs : EventArgs

The SetStateEventArgs type exposes the following members.

  NameDescription
Public methodSetStateEventArgsInitializes a new instance of the SetStateEventArgs class.
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  NameDescription
Public propertyTargetStateNameGets the state to set the StateActivity to.
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  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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The StateMachineWorkflowActivity allows for setting the state from the host application. This enables the host application to override the current state of a state machine. This can be accomplished by enqueuing an instance of the SetStateEventArgs class to the WorkflowQueue named by the constant StateMachineWorkflowActivity.SetStateQueueName.

A simpler way to accomplish this is to use the SetState method in the StateMachineWorkflowInstance class.

You can use the SetState method to perform a SetState operation from the host, or you can do it yourself by enqueuing an event to the state machine workflow as shown in the following example.

public void SetState(string targetStateName)
{
      if (targetStateName == null)
      {
            throw new ArgumentNullException("targetStateName");
      }
      SetStateEventArgs args1 = new SetStateEventArgs(targetStateName);
      this.WorkflowInstance.EnqueueItemOnIdle("SetStateQueue", args1, null, null);
}

The state machine workflow uses a special queue called SetStateQueue to listen to these special events.

.NET Framework

Supported in: 4, 3.5, 3.0

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.

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

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