| title | description | ms.date | ms.assetid |
|---|---|---|---|
Procedural Workflows |
In Workflow Foundation, procedural workflows use flow-control methods similar to those found in procedural languages. |
03/30/2017 |
52401de9-9115-472d-8fd9-047af6a072b9 |
Procedural workflows use flow-control methods similar to those found in procedural languages. These constructs include While and If. These workflows can be freely composed using other flow control activities such as xref:System.Activities.Statements.Flowchart and xref:System.Activities.Statements.Sequence.
The workflow activity library has activities for modeling most flow-control methods used in procedural languages. These include:
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xref:System.Activities.Statements.While
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xref:System.Activities.Statements.DoWhile
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xref:System.Activities.Statements.ForEach%601
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xref:System.Activities.Statements.Parallel
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xref:System.Activities.Statements.ParallelForEach%601
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xref:System.Activities.Statements.If
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xref:System.Activities.Statements.Switch%601
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xref:System.Activities.Statements.Pick
To use flow control activities, drag and drop them from the Activity toolbox into a composite activity inside the designer window.
Note
If using the hosting features of Windows Server AppFabric to host workflows on a Web farm, AppFabric will move instances between different AppFabric servers. This requires that the resources are able to be shared between all nodes. None of the default NET 4 workflow activities contain any operations that access local resources. Since AppFabric does not offer any mechanism to mark a workflow as immovable, a developer must not create custom activities that fail when a workflow is moved.