WorkflowInstance.Start WorkflowInstance.Start WorkflowInstance.Start WorkflowInstance.Start Method


Starts the execution of the workflow instance.

 void Start();
public void Start ();
member this.Start : unit -> unit
Public Sub Start ()


The workflow runtime engine is not running.


The workflow instance has already been started.


The following code example demonstrates how you can use the Start method to start a WorkflowInstance in a workflow host. The code creates an instance of the WorkflowRuntime, adds services to the runtime, and then demonstrates the recommended way to create a WorkflowInstance object. It creates a Type object and casts it to one of the workflow objects with which the host is associated. The code next initializes WorkflowInstance by calling the CreateWorkflow method and passing the previously created type to it. The WorkflowInstance is started with the Start method call.

This code example is part of the Canceling a Workflow SDK sample from the Program.cs file. For more information, see Canceling a Workflow.

Type type = typeof(SampleWorkflow1);
WorkflowInstance workflowInstance = workflowRuntime.CreateWorkflow(type);
Dim workflowInstance As WorkflowInstance
workflowInstance = workflowRuntime.CreateWorkflow(GetType(SampleWorkflow))


Start calls ExecuteActivity on the root activity of this workflow instance. If Start encounters an exception, it terminates the workflow instance by calling Terminate with the Message property of the exception passed as the reason for the termination.

Applies to

See also