WorkflowApplication Constructors

Definition

Namespace:

System.Activities

Assembly:

System.Activities.dll

Creates a new instance of the WorkflowApplication class.

Overloads

WorkflowApplication(Activity)	Creates a new instance of the WorkflowApplication class with the specified workflow definition.
WorkflowApplication(Activity, WorkflowIdentity)	Creates a new instance of the WorkflowApplication class with the specified workflow definition and definition identity.
WorkflowApplication(Activity, IDictionary<String,Object>)	Creates a new instance of the WorkflowApplication class that uses the specified workflow definition and argument values.
WorkflowApplication(Activity, IDictionary<String,Object>, WorkflowIdentity)	Creates a new instance of the WorkflowApplication class that uses the specified workflow definition and argument values, and definition identity.

WorkflowApplication(Activity)

Creates a new instance of the WorkflowApplication class with the specified workflow definition.

public:
 WorkflowApplication(System::Activities::Activity ^ workflowDefinition);

public WorkflowApplication (System.Activities.Activity workflowDefinition);

new System.Activities.WorkflowApplication : System.Activities.Activity -> System.Activities.WorkflowApplication

Public Sub New (workflowDefinition As Activity)

Parameters

workflowDefinition

Activity

The workflow definition.

Examples

The following example hosts a workflow using WorkflowApplication. A WorkflowApplication instance is constructed using a workflow definition consisting of a single DiceRoll activity. The DiceRoll activity has two output arguments that represent the results of the dice roll operation. When the workflow completes, the outputs are retrieved in the Completed handler, and the following output is displayed to the console.

Workflow aae3fb48-7229-4737-b969-d63e131b96b3 Completed.   
The two dice are 1 and 5.  

public sealed class DiceRoll : CodeActivity
{
    public OutArgument<int> D1 { get; set; }
    public OutArgument<int> D2 { get; set; }

    static Random r = new Random();

    protected override void Execute(CodeActivityContext context)
    {
        D1.Set(context, r.Next(1, 7));
        D2.Set(context, r.Next(1, 7));
    }
}

 // Create a WorkflowApplication instance.
 WorkflowApplication wfApp = new WorkflowApplication(new DiceRoll());

 // Subscribe to any desired workflow lifecycle events.
 wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
 {
     if (e.CompletionState == ActivityInstanceState.Faulted)
     {
         Console.WriteLine("Workflow {0} Terminated.", e.InstanceId);
         Console.WriteLine("Exception: {0}\n{1}",
             e.TerminationException.GetType().FullName,
             e.TerminationException.Message);
     }
     else if (e.CompletionState == ActivityInstanceState.Canceled)
     {
         Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
     }
     else
     {
         Console.WriteLine("Workflow {0} Completed.", e.InstanceId);

         // Outputs can be retrieved from the Outputs dictionary,
         // keyed by argument name.
         Console.WriteLine("The two dice are {0} and {1}.",
             e.Outputs["D1"], e.Outputs["D2"]);
     }
 };

// Run the workflow.
 wfApp.Run();

WorkflowApplication(Activity, WorkflowIdentity)

Creates a new instance of the WorkflowApplication class with the specified workflow definition and definition identity.

public:
 WorkflowApplication(System::Activities::Activity ^ workflowDefinition, System::Activities::WorkflowIdentity ^ definitionIdentity);

public WorkflowApplication (System.Activities.Activity workflowDefinition, System.Activities.WorkflowIdentity definitionIdentity);

new System.Activities.WorkflowApplication : System.Activities.Activity * System.Activities.WorkflowIdentity -> System.Activities.WorkflowApplication

Public Sub New (workflowDefinition As Activity, definitionIdentity As WorkflowIdentity)

Parameters

workflowDefinition

Activity

The workflow definition.

definitionIdentity

WorkflowIdentity

The definition identity.

WorkflowApplication(Activity, IDictionary<String,Object>)

Creates a new instance of the WorkflowApplication class that uses the specified workflow definition and argument values.

public:
 WorkflowApplication(System::Activities::Activity ^ workflowDefinition, System::Collections::Generic::IDictionary<System::String ^, System::Object ^> ^ inputs);

public WorkflowApplication (System.Activities.Activity workflowDefinition, System.Collections.Generic.IDictionary<string,object> inputs);

new System.Activities.WorkflowApplication : System.Activities.Activity * System.Collections.Generic.IDictionary<string, obj> -> System.Activities.WorkflowApplication

Public Sub New (workflowDefinition As Activity, inputs As IDictionary(Of String, Object))

Parameters

workflowDefinition

Activity

The workflow definition.

inputs

IDictionary<String,Object>

The values for arguments defined on the root activity of the workflow definition, keyed by argument name.

Examples

The following example hosts a workflow using WorkflowApplication. A WorkflowApplication instance is constructed using a workflow definition consisting of a single Divide activity that takes two input arguments, and a dictionary of input arguments containing the two values to be passed, keyed by argument name. The desired workflow lifecycle events are handled, and the workflow is invoked with a call to Run. When the workflow is completed, the following output is displayed to the console.

Workflow 8dc844c1-bbf8-4b21-a9a2-05f89e416055 Completed  
500 / 36 = 13 Remainder 32  
Workflow 8dc844c1-bbf8-4b21-a9a2-05f89e416055 Unloaded.  

public sealed class Divide : CodeActivity
{
    [RequiredArgument]
    public InArgument<int> Dividend { get; set; }

    [RequiredArgument]
    public InArgument<int> Divisor { get; set; }

    public OutArgument<int> Remainder { get; set; }
    public OutArgument<int> Result { get; set; }

    protected override void Execute(CodeActivityContext context)
    {
        int quotient = Dividend.Get(context) / Divisor.Get(context);
        int remainder = Dividend.Get(context) % Divisor.Get(context);

        Result.Set(context, quotient);
        Remainder.Set(context, remainder);
    }
}

int dividend = 500;
int divisor = 36;

Dictionary<string, object> inputs = new Dictionary<string, object>();
inputs.Add("Dividend", dividend);
inputs.Add("Divisor", divisor);

// Create a WorkflowApplication instance.
WorkflowApplication wfApp = new WorkflowApplication(new Divide(), inputs);

// Subscribe to any desired workflow lifecycle events.
wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
{
    if (e.CompletionState == ActivityInstanceState.Faulted)
    {
        Console.WriteLine("Workflow {0} Terminated.", e.InstanceId);
        Console.WriteLine("Exception: {0}\n{1}",
            e.TerminationException.GetType().FullName,
            e.TerminationException.Message);
    }
    else if (e.CompletionState == ActivityInstanceState.Canceled)
    {
        Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
    }
    else
    {
        Console.WriteLine("Workflow {0} Completed.", e.InstanceId);

        // Outputs can be retrieved from the Outputs dictionary,
        // keyed by argument name.
        Console.WriteLine("{0} / {1} = {2} Remainder {3}",
            dividend, divisor, e.Outputs["Result"], e.Outputs["Remainder"]);
    }
};

// Run the workflow.
wfApp.Run();

WorkflowApplication(Activity, IDictionary<String,Object>, WorkflowIdentity)

Creates a new instance of the WorkflowApplication class that uses the specified workflow definition and argument values, and definition identity.

public:
 WorkflowApplication(System::Activities::Activity ^ workflowDefinition, System::Collections::Generic::IDictionary<System::String ^, System::Object ^> ^ inputs, System::Activities::WorkflowIdentity ^ definitionIdentity);

public WorkflowApplication (System.Activities.Activity workflowDefinition, System.Collections.Generic.IDictionary<string,object> inputs, System.Activities.WorkflowIdentity definitionIdentity);

new System.Activities.WorkflowApplication : System.Activities.Activity * System.Collections.Generic.IDictionary<string, obj> * System.Activities.WorkflowIdentity -> System.Activities.WorkflowApplication

Public Sub New (workflowDefinition As Activity, inputs As IDictionary(Of String, Object), definitionIdentity As WorkflowIdentity)

Parameters

workflowDefinition

Activity

The workflow definition.

inputs

IDictionary<String,Object>

The definition identity.

definitionIdentity

WorkflowIdentity

The values for arguments defined on the root activity of the workflow definition, keyed by argument name.