- Microsoft Windows Workflow Foundation 4.0 Cookbook
- Andrew Zhu
- 289字
- 2021-04-13 17:00:33
In this chapter, we will cover:
- Creating the first WF program: HelloWorkflow
- Creating a WF program using C# code
- Initializing a WF program using InArguments
- Creating a WF program using OutArgument
- Creating a WF Program using InOutArgument
- Using Variable in a WF program
- Running a WF program asynchronously
- Customizing a MyReadLine activity with Bookmark
- Converting a WF program instance to XAML
- Loading up a WF program from an XAML file
- Testing a WF program with a unit test framework
- Debugging a WF program
Considering workflow programs as imperative programs, we need to think of three fundamental things:
- How to define workflow programs
- How to build (compile) workflow programs
- How to execute workflow programs
In WF4, we can define a workflow in either managed .NET code or in XAML. There are two kinds of code workflow authoring styles:
There are also two ways to author workflow in XAML:
- By WF designer (recommended)
- Typing XML tags manually
Essentially, a workflow program is a .NET program, no matter how we create it.
After defining workflows, we can build workflow applications as we build normal .NET applications.
When it comes to workflow execution, we need to consider three basic things:
- How to flow data into and out of a workflow
- How to store temporary data when a workflow is executing
- How to manipulate data in a workflow
This chapter is going to focus on answering these questions.
Before moving ahead, make sure we have the following installed on our computer:
- Windows Vista/7 or Windows Server 2008
- Visual Studio 2010 and .NET framework 4.0
We can also use Windows XP; however, its usage is not recommended.
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