Built-in Activities

This topic applies to Windows Workflow Foundation 4 (WF4).

This section contains samples that demonstrate built-in Windows Workflow Foundation (WF) activities.

In This Section

• Fault Handling in a Flowchart Activity Using TryCatch
  Demonstrates how the TryCatch activity can be used within a complex control flow activity.

• Emulating breaking in a While activity
  Demonstrates how to break the looping mechanism of the following activities: DoWhile, ForEach, While, and ParallelForEach.

• DynamicActivity Creation
  Demonstrates two different ways to create an activity at runtime using the DynamicActivity activity.

• Using Variables with a .NET Framework 3.5 Ruleset
  Demonstrates how to create a workflow that uses the Interop activity to integrate a custom activity written in .NET Framework 3.5 that uses policy and rules.

• Load From XAML
  Demonstrates how to dynamically load a XAML workflow without having to run the XamlBuildTask tool.

• Using Collection Activities
  Demonstrates how to use the collection activities (AddToCollection, ClearCollection, ExistsInCollection, and RemoveFromCollection) with a class that implements the ICollection interface and how to create a custom activity that iterates over a collection to print out the contents of each element in the collection.

• Using the InvokeMethod Activity
  Demonstrates how to use the InvokeMethod activity to invoke public methods in public classes.

• Using the Pick Activity
  Demonstrates how to use the Pick activity.

• Using Procedural Activities
  Demonstrates how to use the Sequence, Assign, If, While, Switch, TryCatch, and WriteLine activities to implement a guessing game.

• Using CancellationScope
  Demonstrates how to use the CancellationScope activity to cancel work in an application.

• InvokeMethod
  Demonstrates the different ways to use the InvokeMethod activity to invoke methods of a class.

• Usage of the Switch Activity with Custom Types
  Describes how to enable a Switch activity to evaluate a user-defined complex type at runtime.

• Interop with 3.5 Rule Set
  Demonstrates the use of the Interop activity to integrate with a custom activity in .NET Framework 3.5 using PolicyActivity and rules.

Build Date: 2012-03-02