TAILIEUCHUNG - Apress Expert C sharp 2005 (Phần 8)

Tham khảo tài liệu 'apress expert c sharp 2005 (phần 8)', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 2 26 06 9 56 PM Page 324 324 CHAPTER 6 OBJECT-ORIENTED APPLICATION DESIGN have a start date but no end date. When the project is complete the project manager can enter an end date. These dates will be used to report on the average lengths of the projects so obviously the end date can t be earlier than the start date. Every project also has a list of the resources assigned to it see the Assigning a Resource section later in this chapter . Editing a Project Project managers can edit any existing projects. The manager chooses from a list of projects and can then edit that project. They need the ability to change the project s start and end dates as well as its description. They also need to be able to change the resources assigned to the project see the Assigning a Resource section later in this chapter . Removing a Project Project managers or administrators must be able to remove projects. There is no need to keep historical data about deleted projects so such data should be completely removed from the system. The user should just choose from a list of projects confirm his choice and the project should be removed. Resource Maintenance At this point the system not only tracks projects but also tracks the resources assigned to each project. For the purposes of this simple example the only project resources tracked are the people assigned to the projects. With further questioning of the users a set of use cases revolving around the resources can be developed without reference yet to the projects in which they may be involved. Adding a Resource We don t want to replicate the Human Resources HR database but we can t make use of the HR database because the HR staff won t give us access. We just want to be able to keep track of the people we can assign to our projects. All we care about is the person s name and employee ID. Obviously each person must have an employee ID and a valid name. Resources can be added by project managers or supervisors. It would

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