问题
I am developing an application where the users can execute tasks / workflows. Each task is made up of a queue of actions to be executed. I want to be able to be able to have user input after the workflow is started.
Example:
- Task starts
- Action1 starts
- Action1 ends
- Action2 starts
- Action2 ends
- Action3 needs user input (UI opens window to get user input)
- Action3 gets user input
- Action3 starts
- Action3 ends
- Task ends
I am developing this i C# and I am aware of Workflow Foundation and tasks in C#. They may have what I need, but I am also interested in hearing about a design pattern for doing this from scratch.
回答1:
What you have described is the Sequence Workflow Pattern.
There are more Workflow Patterns at the Workflow Patterns initiative and in MSDN Magazine.
回答2:
I think the following articles can help you with the async task part:
The Task-based Asynchronous Pattern
TPL and Traditional .NET Asynchronous Programming
来源：https://stackoverflow.com/questions/8613905/recommend-a-design-pattern-for-a-workflow-application