CODEWITHSUNDEEP
c#persistencec#-4.0workflow-foundation-4
Jeff LaFay
Jeff LaFay

Reputation: 13350

How do I properly Load a Workflow after Pausing/Persisting it?

Using this MSDN Article as an example for pausing and resuming, one would assume that this would be pretty straight forward. This is how I'm "pausing" the workflow...

LastWfGuid = workflow.Id;
workflow.Unload();

Pretty simple, it's supposed to persist to the instance store (which I already set prior to these two lines) and I do see entries in the Instance view and the InstancesTable. When I'm ready to resume the workflow I do this...

workflow = new WorkflowApplication( myActivity, myWfArgs );
workflow.InstanceStore = wfStore;
workflow.Load(LastWfGuid);

At that point I get an InvalidOperationException with the exception message being...

Workflow inputs cannot be used with Load or LoadRunnableInstance, since they are only provided to new instances.

If I can't load a workflow that was previously persisted, how do I resume it again? I tried simply caling Persist() in place of Unload() and from the outside it looks ok and I receive no exception. But, the workflow continues to run it's course which is not what I'm looking for. I want to pause and then resume my workflow.

Upvotes: 3

Views: 3790

Answers (1)

Maurice
Maurice

Reputation: 27632

Remove the myWfArgs argument when creating the WorkflowApplication used to load the existing workflow instance. So like this:

workflow = new WorkflowApplication(myActivity);
workflow.InstanceStore = wfStore;
workflow.Load(LastWfGuid);

Upvotes: 3

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