Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

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

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

Namespace:  System.Activities
Assembly:  System.Activities (in System.Activities.dll)
public WorkflowApplication(
	Activity workflowDefinition,
	IDictionary<string, Object> inputs


Type: System.Activities.Activity

The workflow definition.

Type: System.Collections.Generic.IDictionary<String, Object>

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

The following example hosts a workflow using WorkflowApplication. A WorkflowApplication instance is constructed using 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
    public InArgument<int> Dividend { get; set; }

    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}",
    else if (e.CompletionState == ActivityInstanceState.Canceled)
        Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
        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.

.NET Framework

Supported in: 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback
© 2014 Microsoft. All rights reserved.