Activity Library

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

This section contains samples that demonstrate advanced custom activities in Windows Workflow Foundation (WF).

In This Section

• Policy Activity in .NET Framework 4
  Demonstrates how the Policy4 activity allows Windows Workflow Foundation in .NET Framework version 3.5 (WF 3.5) RuleSet objects to be used in Windows Workflow Foundationin .NET Framework version 4 (WF 4) directly by using the rules engine that is shipped in WF 3.5.

• Custom Activity to Switch on a Range of Values
  Demonstrates how to create a custom activity that extends the use of a Switch.

• LINQ to Objects Activity
  Demonstrates how to create an activity to use LINQ to Objects to query elements in a collection.

• LINQ to SQL
  Demonstrates how to create an activity to use LINQ to SQL query entities from tables in SQL Server databases.

• Using the InvokePowerShell Activity
  Demonstrates how to invoke Windows PowerShell commands using the InvokePowerShell activity.

• RangeEnumeration Activity
  Demonstrates how to create a custom activity that iterates over a collection of numbers.

• Regular Expression Activities
  Demonstrates how to create a set of activities that expose the regular expression functionality of the System.Text.RegularExpressions namespace.

• SendMail Custom Activity
  Demonstrates how to create a custom activity that derives from AsyncCodeActivity to send mail using SMTP for use within a workflow application.

• For Activity
  Demonstrates how to build a custom activity that inherits from NativeActivity and use it in a workflow to iterate over a range of values.

• Wait For Input Activity
  Demonstrates how to create named bookmarks in a workflow.

• Throttled Parallel ForEach
  Demonstrates how the ThrottleParallelForEach activity is similar to the ParallelForEach activity with the one exception that it allows setting a concurrency factor to restrict the number of simultaneous branches to execute.

• Entity Activities
  Demonstrates how to use the ADO.NET Entity Framework with Windows Workflow Foundation to simplify data access.

• Database Access Activities
  Demonstrates how to create activities that allow accessing databases to retrieve or modify information and use ADO.NET to access the database.

• CommentOut Activity
  Demonstrates how to write a custom activity that removes other activities from the path of execution, effectively commenting them out.

• Externalized Policy Activity in .NET Framework 4
  Demonstrates how the ExternalizedPolicy4 activity allows executing existing Windows Workflow Foundation in .NET Framework version 3.5 (WF 3.5) RuleSet objects in Windows Workflow Foundation in .NET Framework version 4 (WF 4) directly by using the rules engine that is shipped in WF 3.5.

• NoPersistScope Activity
  Demonstrates how to manipulate a non-serializable and disposable state within a workflow.

• Non-Generic ForEach
  Demonstrates how to create a non-generic version of the ForEach activity.

• Non-Generic ParallelForEach
  Demonstrates how to create a non-generic version of the ParallelForEach activity.

• Get WorkflowInstanceId
  Demonstrates how to use the custom activity, GetWorkflowInstanceId, to return the workflow instance ID.

Build Date: 2012-03-02