Control Flow Activity Designers

 

Windows Workflow Designer includes a number of system-provided activities that you can use when constructing your workflows. This section contains the system-provided activities used to control the flow within a workflow. The following topics describe these activities and provide guidance on how to use them.

DoWhile
Executes the activity contained in its body at least once, until a specified condition evaluates to true.

ForEach<T>
Executes the activity contained in its body for each item in a specified collection.

If
Evaluates a condition and executes an activity depending on the results of that evaluation.

Parallel
Executes a collection of child activities concurrently.

ParallelForEach<T>
Enumerates the elements of a collection and executes an embedded statement for each element of the collection in parallel

Pick
Executes one of several branches in response to some event that provides event-based flow control.

PickBranch
Provides a potential path of execution within a Pick activity.

Sequence
Contains an ordered collection of child activities that it executes in order.

Switch<T>
Evaluates a specified expression and executes the activity from a collection of activities whose associated key matches the value obtained from the evaluation.

While
Executes the activity contained in its body while a specified condition evaluates to true.

Activity

DoWhile

ForEach<T>

If

Parallel

ParallelForEach<T>

Pick

PickBranch

Sequence

Switch<T>

While

For other types of activity designers, see the following topics.

Using the Activity Designers

Flowchart

Messaging

Runtime

Primitives

Transaction

Collection

Error Handling

Using the Activity Designers

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