CODEWITHSUNDEEP
workflow-foundation
Megacan
Megacan

Reputation: 2518

Executing WorkflowInstance more then once

If I have have a WorkflowInstance can I executed twice in a row?

WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(...));
instance.start();
instance.start();

When I do this I get and exception telling me that I don't have a persistence service configured. However my question is: after I execute the WorkflowInstance once can a instance be run a second time, or dos it become unusable? Do I have to create another instance everytime I want to executed?

Upvotes: 0

Views: 593

Answers (4)

Kwal
Kwal

Reputation: 1531

As per Rutesh's answer, you cannot start the same instance twice. If the workflow has been unloaded (i.e. persisted) you can load the workflow again using WorkflowInstance.Load().

Upvotes: 0

Dave Swersky
Dave Swersky

Reputation: 34820

A workflow Instance, once started, moves forward through the workflow definition and then terminates. It cannot be "reused" to execute another workflow the way an object can be cached and reused.

There are several things you can do to improve the performance of your workflow, depending on how it is built.

Upvotes: 0

Megacan
Megacan

Reputation: 2518

Yes I see I can't start an instance twice. However, what I wanted was to create the instance once and be able to run the workflow several times.

My problem is that WorkflowInstance creation is somewhat heavy.

Upvotes: 0

Rutesh Makhijani
Rutesh Makhijani

Reputation: 17235

As per the specifications of WorkflowInstance you can start the instance only once

have a look at http://msdn.microsoft.com/en-us/library/system.workflow.runtime.workflowinstance.start.aspx

An InvalidOperationException is thrown if the instance is already running

Upvotes: 1

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