Workflow and Host Communication in WF 4.0–Parameter Passing

Workflow host is an application responsible for executing the workflow and managing different workflow lifecycle events like start, completion, idle, unloaded etc.Now the workflow host should be capable of exchanging information with the workflow. This information exchange can be broadly categorized into: a) The parameters/arguments needed to start the workflow and to get the results [...]

Workflow Foundation Rule Engine – Policy Activity

In my last post I had written about the Rule Engine that comes embedded with Windows Workflow Foundation and in this post I will show how we can use this with the PolicyActivity. The System.Workflow.Activities.PolicyActivity class is a specialized workflow activity class that encapsulates a RuleSet.The PolicyActivity.RuleSetReference property maintains reference to a RuleSet stored in [...]

Workflow Foundation Rule Engine – Part I

In my post on Business Rules and Rule Engine I have explained about Business Rules,Business Processes and what actually a Rule Engine does.In this post I will be discussing about the Rule Engine that comes with Windows Workflow Foundation(WF). First let us explore the important classes related to Rule Engine and how they provide abstraction [...]