Microsoft Windows Workflow Foundation 4.0 Cookbook

Chapter 4. Manipulating Collections

In this chapter, we will cover:

• Printing collection items
• Using AddToCollection<T> activity
• Using ClearCollection<T> activity
• Using RemoveFromCollection<T> activity
• Using ExistsInCollection<T> activity

Introduction

Imagine that we have defined a List<T> type Variable in workflow, and we want to add, remove, and update items of the collection object. By default, WF4 provides us with four activities—AddToCollection<T>, ClearCollection<T>, RemoveFromCollection<T>, and ExistsInCollection<T>—using which we can manipulate collection as we wish.