By Kenn Scribner
Get hands-on tips for utilizing Microsoft home windows Workflow starting place to create process-managed purposes for Microsoft Windows—one step at a time. figuring out home windows Workflow origin is vital for each developer who works with a number of functions and providers that needs to alternate facts or effects. home windows Workflow beginning defines a method circulate among humans, purposes, and services—mapping dependencies and sequences to permit automation of initiatives throughout formerly stand-alone courses. With step-by-step, you're employed at your individual speed via hands-on, learn-by-doing routines to appreciate the middle features and primary concepts for operating with home windows Workflow starting place. New-to-topic builders can take a sequential method of knowing workflows and studying find out how to create home windows Workflow Foundation–enabled functions and providers. This e-book contains a CD with perform workouts and code samples to assist builders speed up their productivity.
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Extra resources for Windows Workflow Foundation Step By Step
But if you’re like me, just executing wizards and such is fine only if you understand the code they’re inserting. After all, the code is yours to maintain and understand once the code generator’s job is complete. So what does it take to host WF in your application? Well, aside from building the workflow tasks that WF is to run (that’s your job), all you really need to do is reference the WF assemblies and provide the necessary code to bring WorkflowRuntime into execution, start it, and manage the operational conditions you’re interested in managing.
WorkflowIdled Raised when a workflow instance enters the idle state. When workflow instances go idle, you have the opportunity to unload them from memory, store them in a database (in case they’re waiting for a long-running task), and bring them back into memory at a later time. We’ll tackle this in Chapter 6. WorkflowTerminated Raised when a workflow instance is terminated. The workflow can be terminated by the host through a call to the Terminate method of a workflow instance, by a Terminate activity, or by the workflow runtime when an unhandled exception occurs.
Of course, the appropriate place to call StopRuntime is just prior to or during your application shutdown logic, or as the AppDomain is being torn down. Tip Just as calling StartRuntime is not mandatory (but not a bad idea), calling StopRuntime also isn’t mandatory (but is similarly a good idea). As the WF runtime assembly unloads, StopRuntime is called automatically. Note You cannot call StopRuntime once the WorkflowRuntime object is marked as disposed. Doing so results in an ObjectDisposedException.