Application And Research On Design Pattern In OA

Along with the popularity of Internet,the traditional client/server model isn't fit for the basic architecture of enterprise management system any longer..NET,which leaded by Microsoft Corporation,is an-tier based,distributed application design environment.It provides strong support to the development of web based multi-tiers application.But,it is not enough to develop robust,extensible and easy maintained application that we just know the technique details.We also need to know when and how to use design patterns correctly.Design patterns root in the practice of many experts in studying system designing and maintaining.It describes general solutions to a certain kind of common problems in the process of software design.It is a kind of successful architecture,design, executive plan.Design patterns not only redounds to accumulating and transferring the experience,but also helps us to record and communicate the solution which has been proved to be right.Such solution can resolve the problems which occurred in different environment.We can overcome a variety of difficulties that we have been faced with during developing enterprise application software by using design patterns efficiently.The thesis introduces all of the 23 kinds of design patterns and emphasizes some rules that to be followed when use those patterns.The thesis focuses on four of the patterns and gives some examples in details.As to these four patterns,author analyses all of them detailedly,points out its advantage and applicable area and paints corresponding structure diagram.In the last section of thesis,author provides an example to demonstrate how to combine multiple patterns together.The example isn't complicated,but its design and code according to the design patterns strictly.